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#4 Top Locking Nuts
Automation-Style Lock Nuts, Top Locking Lock Nuts or Stover Lock Nuts are lock nuts with a locking feature deformed into the top of the nut. This deformation crimps the internal thread, increasing its friction against the mating bolt or stud, leading to the locking feature.
105 results, (click on any line for more information)
| Search Results Sponsored by Perigee Manufacturing, your source for All Metal Top-Lock Nuts. For more results, visit perigeemfg.com | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Buy Top Locking Nuts from one of our FCH Network Members | ||||||||
| Wurth | IN | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Passivated | #4-10 | #4-10 hex metal self lock nut passivated nas1291-c04m dfars compliant | 12,000 |
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| Century | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 4109-12 | sl4109-12-p-nor nut self-locking | 8 |
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| IRF | NJ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 4 40-2 x .120 | locknut .163x#4-40 unf-2x.120 303 ss | 32,300 |
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| MAINSOURC | NH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 316, 317, A4 Stainless | Plain | #4-40 | 4-40 ny insert l/n (ne/nm) 316 ss | 50 |
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| MAINSOURC | NH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | ms21042l04 (4-40 kaynar l/n stl c&y lub) | 158 |
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| JET FITTING | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | #4-40 | 4-40 lock nut steel cadmium ii plated yellow b18.2.2 | 1260 |
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| RCFast | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | nut, self-locking, hex flange, 4-40 MS21043-04 | 132 |
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| TSF | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | #4-40 | locking ss nut | 280 |
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| GLF | OH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | 4-40 ss reduced height lock nut MS21043-04 b18.2.2 () () () | 19 |
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| GLF | OH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | #4-40 | 4-40 lock nut steel cad ii plating MS21042-04 b18.2.2 () () () | 110 |
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| GLF | OH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | #4-40 | #4-40 flex lock nut stl cad/yel b18.2.2 () () () | 35 |
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| Century | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | #4-40 | ms21042-04 nut self locking nut self locking reduced hexagon height 4/40 thread steel cad-plated (NUT SELF LOCKING REDUCED HEXAGON HEIGHT 4/40 THREAD STEEL CAD-PLATED) (NUT SELF LOCKING REDUCED HEXAGON HEIGHT 4/40 THREAD STEEL CAD-PLATED) | 16633 |
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| Century | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | nas679a04w | 30 |
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| Century | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | ms21045c04 | 115 |
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| Century | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | ms21042l04 locknut (LOCKNUT) (LOCKNUT) | 62 |
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| JHP Fasteners | MI | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | pem alternative plc-440 captive cplc440 self-locking nut ss thread-4-40 | 1000 |
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| American | NY | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Yellow | #4-40 | nylon stop nut zy | 4400 |
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| MFS | KS | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Nylon (Polyamide) | Plain | #4-40 | lock nut | 763 |
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| Cal Fastenrs | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | hex nylok nut low profile 18-8 304 nylon lock nt 4CNNE3/LOW | 60 |
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| Cal Fastenrs | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Clear | #4-40 | hex nylok nut low profile i see 4cnnez/cr3low 4CNNEZ/LOW | 100 |
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| Cal Fastenrs | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Clear | #4-40 | flex lock nut 21fa-440 | 893 |
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| Standard | MA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Brass | Plain | #4-40 | 4-40 full lock nut brass b18.2.2 | 111050 |
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| Standard | MA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 thin lock nut 18-8 stainless steel b18.2.2 | 35744 |
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| Standard | MA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 316, 317, A4 Stainless | Plain | #4-40 | 4-40 full lock nut 316 stainless steel b18.2.2 | 104474 |
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| Standard | MA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 full lock nut 18-8 stainless steel b18.2.2 | 109182 |
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| Global | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | MS21043-04 | 12,860 |
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| Global | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | #4-40 | MS21042-04 | 280 |
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| Global | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | MS21042L04 | 120 |
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| MTP | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-40 | # 4-40 cad flex-lock nuts a bb 100 fb 500 qk 2500 | 200 |
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| Delta | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-40 | nut flexloc full height light hex cad 4-40 | 990 |
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| Delta | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | nut flexloc full height light hex 18-8 sst 4-40 (FLEXLOC) | 100 |
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| SJS Prod | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Yellow | #4-40 x 1/4 | 4-40 x 1/4 fill/hd slot mod thd lng=.125 st zy |
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| Trifast | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | 4-40unc floating nut non lock-2 stl astmb633z1cr3bakesrt | 6662 |
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| Trifast | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 hex loc nut a2 s/s .246a/f .89thk plain self finish | 1616 |
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| SWACO | OH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Yellow | #4-40 | 4-40 lock nut steel cadmium ii plated yellow | 1720 |
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| ULTRA | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-40 | flexloc 21fa440 | 4100 |
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| ULTRA | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | flexloc 20fa440 | 900 |
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| AIH | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | 4-40 self locking nut dry film lube MS21042L04 | 34962 |
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| AIH | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | lock nut reduced height 4-40 s/s MS21043-04 | 4943 |
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| AIH | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | nut 304ss MS21045C04 | 203 |
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| AIH | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | nut NAS679A04W | 51 |
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| ASFCORP | MI | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 full hgt hex ny in lock nut ss pkg | 500 |
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| ASMC | IL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | #4-40 coarse flexloc nut light hex full ss18-8 | 5 |
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| Mid-Valley | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | lock nut top locking all metal (automation style etc.) b18.2.2 | inquire |
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| MTP | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-40 | #4-40 cad flex-lock nuts | 200 |
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| Liberty | IL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 flex-loc nut light 18-8 s/s 18-8 s/s | 100 |
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| AIH | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | self-locking nut carbon | 554 |
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| AIH | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | self-locking nut carbon | 554 |
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| Hayes | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-40 | 4-40 full/lite flex style l/n cad i | 900 |
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| Hayes | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | ms21045c04 4-40 all metal locknut 18-8 | 154 |
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| Hayes | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | #4-40 | ms21072l04 4-40 locking nutplate a286 dfl 450 | 156 |
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| IndexFast | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | n440nlss 4-40 nylon insert lock nut stainless steel | inquire |
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| NAPPCO | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 18-8 304 flexloc full height FLE-50FA440 (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) (555-FLEXLOC) | 40 |
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| Delta | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-40 | flex-.oc typ ln cad 4-40 | 285 |
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| CONTAERO | NJ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Clear | #4-40 | kl locknut Cr3+ | 673600 |
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| SWACO | OH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | ms21043-04 4-40 hex lock nut | 53 |
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| Olander | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 self-locking nut sst steel () | 2217 |
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| JHP Fasteners | MI | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Phosphate | #4-40 | pem alternative feo-440 captive cfeo440 miniture nut self-locking ss blk dry film lube thread-4-40 | 1245 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | 4-40 light hex full height flexslot steel plain 20fa-440 flexloc | 17555 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 microsoze flexslot 18-8 304 steel w/dry film lube 58fm-440 | 74 |
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| AFI | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | 4-40 self-locking nut ss silver () | 2817 |
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| Century | NY | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | #4-40 | ms21042-04 nut self locking nut self locking reduced hexagon height 4/40 thread steel cad-plated | 16745 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Yellow | #4-40 | 4-40 light hex full height flexlsot top lock nut steel zinc yellow and wax 23fa-440-y | 422 |
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| Century | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | ms21045-04 mims21045-04e | 450 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-40 | 4-40 light hex full height flexslot steel cad ii 27fa-440 | 201 |
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| AIH | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | #4-40 | 4-40 lock nut cad plating MS21042-04 | 27 |
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| Olander | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 miniature locknut sst () | 1377 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Yellow | #4-40 | 4-40 light hex full height flexslotted steel zinc yellow and wax | 497 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-40 | 4-40 light hex full height flexslot steel cad ii | 201 |
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| JET FITTING | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | ms21043-04 4-40 hex lock nut MS21043-04 b18.2.2 | 124 |
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| Century | NY | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | kaynar k7000-04-6 4-40 self locking nut | 36 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | 4-40 microsize flexslot steel 30fm-440 | 196 |
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| QCS | OR | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | 4-40 hex nut self locking ms21042l04 | 2000 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Silver | #4-40 | 4-40 light hex full height flexslot 18-8 s/s silver plated | 2086 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Clear | #4-40 | 4-40 light hex full height flexslot steel zinc 23fa-440 | 796 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Brass | Plain | #4-40 | 4-40 microsize flexlsot brass 60fm-440 flexloc | 8 |
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| Olander | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 4-40 lock nut | 63 |
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| JET FITTING | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Yellow | #4-40 | 4-40 lock nut steel cadmium ii plated yellow MS21042-04 b18.2.2 | 770 |
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| Century | NY | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | ms21045-04 mims21045-04e | 377 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-48 | 4-48 light hex full height flexslot steel cad ii plated | 321 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-48 | 4-48 light hex full height flexslot steel cad ii plated 27fc-428 | 321 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-48 | 4-48 light hex full height flexslot steel cad plated 21fc-448 | 178 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | #4-48 | 4-48 light hex full height flexslot steel cad plated | 178 |
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| Century | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 4017-6 | sl4017-6 nut self-locking | 5 |
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| Century | NY | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | sl4017-6 nut self-locking | 5 |
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| HBBOLT | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 428 | 1/4-28 flexloc thin hgt light hex lock nut 20fk-428 20fk-428 | 1,000 |
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| Century | FL | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | ms21043-04 | 2932 |
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| ULTRA | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Passivated | #4-40 | flexloc 50fa440 | 3500 |
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| AIH | AZ | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 450 | 3/8-24 nut cad plate MS21045-6 | 578 |
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| Komar | AR | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 48oa lngth seamless slick bar tr5 motor 4130 stl | 1 |
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| Komar | AR | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 40oa lngth seamless slick bar tr4 motor 4130 stl | 2 |
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| Global | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 46 | ln(.062)-ln self-locking extension nut 0.266 hexx0.183 lx0.199 idx6-32 thd | 16 |
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| ZAL INDUS | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 4 x 60 | 4 steel locknuts 61940b arl#dln10 tpz#290 | 87 |
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| IPC | VA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Plastic | Plain | 4 | 4 heavy duty plastic swivel caster with top lock brake 275lb capacity | 1 |
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| Exim | S'pore | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 48 | pcb support double locking stylenylon naturalnovoflex pcbs-48 b18.2.2 | 94 |
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| Olander | CA | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | 440 self l/n non-metallic ins stl cad2 | 66 |
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| Rapid | NY | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium | 416 x .2 | nut self-locking iron alloy 660 10-32 unjf-3b qq-p-416 cl.2 | 249 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | flexloc 20fa-440 4-40 light hex full height flexslot steel plain | 17000 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 | 4-40 microsize flexslot 18-8 304 steel w/dry film lube (flexloc) | 74 |
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| Rapid | NY | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Cadmium/Yellow | 416 | nut self-locking plate-one lug floating replaceable nut elements 125 ksi 450f 1.306x.070 cadmium & yellow qq-p-416 | 718 |
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| Hodell | OH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | 420 | 1/4-20 flexloc nut lite/thin 23fk-420 | 8845 |
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| Century | NY | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | sl4109-12-p-nor nut self-locking | 8 |
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| Hodell | OH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Clear | 420 | 1/4-20 flexloc nut hvy/thin zinc fkc-420 | 170 |
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| SPC | TX | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Plain | #4-40 | 4-40 microsize flexslot steel (flexloc) | 196 |
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| Hodell | OH | Lock Nut, Top Locking, All Metal (Automation style, etc.) | Steel | Zinc/Clear | 420 | 1/4-20 flexloc nut hvy/thin zincfkc-420 | 170 |
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