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3/8 Square Nuts
Square Nuts are just four-sided nuts, but compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening. Square nuts are typically mated with square-headed bolts.
116 results, (click on any line for more information)
| Buy Square Nuts from one of our FCH Network Members | ||||||||
|---|---|---|---|---|---|---|---|---|
| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Set Screw | IL | Square Nut | Steel | Zinc/Yellow | 3/8-16 | (1 x3 x1/4) flat rectangular nut & plate | inquire |
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| Ababa | CA | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 sq nut stl pln b18.2.2 | 1312 |
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| Ababa | CA | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 sq nut stl pln b18.2.2 | 300 |
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| Ababa | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 sq nut stl znc b18.2.2 | 50 |
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| YANKEE | NH | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | 3/8-16 square nut (5/8 wide) 18-8 stainless steel | 106 |
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| Weaver | WA | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 square nut plain | 2461 |
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| Weaver | WA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut zinc | 4346 |
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| OneMonroe | NC | Square Nut | Steel | Galvanized | 3/8-16 | 3/8-16 hot dipped galvanized square nut | 2410 |
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| OneMonroe | NC | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut-zp | 200 |
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| Express | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut zinc | 1490 |
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| Ababa | CA | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | 3/8-16 sq nut s/s | 50 |
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| American | NY | Square Nut | Steel | Plain | 3/8-16 | square nut | 10000 |
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| American | NY | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut pl | 1800 |
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| American | NY | Square Nut | Steel | Zinc/Yellow | 3/8-16 | square nut | 1300 |
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| American | NY | Square Nut | Brass | Plain | 3/8-16 x 5/8 x 1/4 | square nut | 30 |
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| B & K FAST | PA | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 square nuts plain b18.2.2 | 304 |
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| QFC | TX | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 square nut plain b18.2.2 | 900 |
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| QFC | TX | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 square nut plain b18.2.2 | 186 |
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| QFC | TX | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 square nut plain b18.2.2 | 704 |
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| QFC | TX | Square Nut | Grade A | Galvanized | 3/8-16 | 3/8-16 square nut hdg a563a b18.2.2 | 1221 |
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| QFC | TX | Square Nut | Grade A | Galvanized | 3/8-16 | 3/8-16 square nut hdg a563a b18.2.2 | 80 |
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| TownCountry | AR | Square Nut | Steel | Plain | 3/8-16 | square nut | 13200 |
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| YANKEE | NH | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut steel zinc plated | 1600 |
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| METRO IND | OH | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut uss | 393 |
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| ACCURATE | IL | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut regular | 3934 |
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| ACCURATE | IL | Square Nut | Steel | Plain | 3/8-16 | square nuts | 1300 |
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| WDMB | IA | Square Nut | Grade 2 | Plain | 3/8-16 | nut square grade 2 (pl) 3/8-16 (W0R0) | 62,864 |
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| MESAFAST | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut | 138.0 |
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| MESAFAST | CA | Square Nut | Steel | Plain | 3/8-16 | square nut | 1,225.0 |
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| Wurth Ada | MN | Square Nut | Grade 2 | Zinc/Clear | 3/8-16 | nut sq grade 2 (zt) 3/8-16 | 4,752 |
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| Wurth Ada | MN | Square Nut | Grade 2 | Plain | 3/8-16 | nut sq grade 2 (pl) 3/8-16 | 1,607 |
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| Wurth Ada | MN | Square Nut | Grade 2 | Zinc/Clear | 3/8-16 | nut sq grade 2 (zn) 3/8-16 | 1,080 |
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| Irwin Ind | Ont | Square Nut | Grade 5 | Zinc/Clear | 3/8-16 | 3/8-16 regular square nut gr 5 steel zinc trivalent clear b18.2.2 | 300 |
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| SunPack | FL | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 carbon steel square nut zinc | 20 |
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| THRDFAST | FL | Square Nut | Steel | Plain | 3/8-16 | square nut b18.2.2 | 1,460 |
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| THRDFAST | FL | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut b18.2.2 | 49 |
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| SIS | AZ | Square Nut | Steel | Galvanized | 3/8-16 | 3/8-16 square nut steel hot dip galvanized | 48141 |
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| NAPPCO | TX | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut steel zinc pltd 3/8-16 | 939 |
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| OBRIEN | OH | Square Nut | Steel | Plain | 3/8-16 | square nuts | 850 |
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| THRDFAST | TN | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut b18.2.2 | 50 |
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| SeattleNB | WA | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | square nut 18-8 ss | 900 |
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| ISSCO | MO | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | square | 3150 |
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| ISSCO | MO | Square Nut | Steel | Galvanized | 3/8-16 | regular h/d | 4000 |
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| Lippin | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut zinc | 2700 |
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| Lippin | CA | Square Nut | Steel | Galvanized | 3/8-16 | 3/8-16 square nut hdg | 1500 |
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| NutsBolts | NE | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut zp | 76 |
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| BHAM | AL | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | square nut 300 ser ss | 6 |
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| Future Fastener | TX | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut plt | 9 |
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| OBRIEN | OH | Square Nut | Steel | Galvanized | 3/8-16 | sq nut | 1200 |
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| Delta | TX | Square Nut | Steel | Galvanized | 3/8-16 | fin square nut stl hdg 3/8-16 | 3593 |
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| Delta | TX | Square Nut | Steel | Zinc/Clear | 3/8-16 | fin square nut zinc 3/8-16 | 195 |
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| Delta | TX | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | fin square nut 18-8 sst 3/8-16 | 1035 |
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| All Size | TX | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut zinc b18.2.2 | 50 |
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| THRDFAST | MS | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut heavy b18.2.2 | 100 |
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| FMP | MA | Square Nut | Steel | Zinc/Clear | 3/8-16 | square m/s nut | 160 |
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| FMP | MA | Square Nut | Brass | Plain | 3/8-16 | square m/s nut |
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| QFC | TX | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | 3/8-16 square nut 18-8 ss b18.2.2 | 80 |
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| Wurth | IN | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 sq nut lt oil print s4230 | 68,564 |
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| KBS | TN | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | 3/8-16 regular squarenut s/s b18.2.2 | 1,735 |
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| KBS | TN | Square Nut | Brass | Plain | 3/8-16 | 3/8-16 regular squarenut brass b18.2.2 | 1,725 |
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| Cal Fastenrs | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut plated square nut | 1,000 |
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| Steelfast | TX | Square Nut | Steel | Zinc/Yellow | 3/8-16 | 160000 |
| |
| MTP | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 zn square nuts | 780 |
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| Kanebridge | IL | Square Nut | Steel | Galvanized | 3/8-16 | 3/8-16 regular square nut hot dipped galvanized | 17.500 |
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| Kanebridge | IL | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 regular square nut zinc | 17.500 |
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| Liberty | IL | Square Nut | Steel | Zinc/Yellow | 3/8-16 | regular square nut & & yellow | 470 |
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| HBBOLT | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut | 1,535 |
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| HBBOLT | CA | Square Nut | Steel | Plain | 3/8-16 | square nuts | 105 |
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| IPC | VA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut steel cr3 zinc-rohs per asme b18.6.3 | 9,517 |
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| IPC | VA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 square nut steel cr3 zinc-rohs .325 max thickness | 2,436 |
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| IPC | VA | Square Nut | Steel | Z inc/Yellow | 3/8-16 | 3/8-16 heavy square nut steel zinc yellow | 900 |
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| XL Screw | GA | Square Nut | Steel | Plain | 3/8-16 | regular square nuts | 1,800 |
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| XL Screw | GA | Square Nut | Steel | Zinc/Clear | 3/8-16 | regular square nuts zp | 1,800 |
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| A-Plus Co | OR | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | 3/8-16 square nut ss | 500 |
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| AMC Inc | CA | Square Nut | Grade 2 | Zinc/Clear | 3/8-16 | square nut | 2000 |
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| Northern | MN | Square Nut | Steel | Zinc/Clear | 3/8-16 | nc sq mach nut pk zc | 400 |
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| Hayes | CA | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | 3/8-16 square nut 18-8ss | 988 |
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| Hayes | CA | Square Nut | Brass | Plain | 3/8-16 | 3/8-16 square nut brass | 16 |
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| Cal Fastenrs | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut square nut trimac need parts | 440 |
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| SWACO | OH | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 sq ms nuts zn | 2548 |
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| Buckeye | OH | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 mod sqr rn nut | inquire |
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| Endries | WI | Square Nut | Grade 2 | Plain | 3/8-16 | 3/8-16 square nut gr 2 | 5076 |
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| THRDFAST | MS | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut b18.2.2 | 44 |
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| OneMonroe | MA | Square Nut | Steel | Galvanized | 3/8-16 | 3/8-16 hot dipped galvanized square nut | 2410 |
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| Raw Produ | NJ | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nuts zinc 3/8-16 | 8 |
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| ASFCORP | MI | Square Nut | Grade 2 | Zinc/Clear | 3/8-16 | 3/8-16 reg sq nut sae j995 gr 2 tri zn fe/zn 5an | 168 |
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| THRDFAST | FL | Square Nut | Steel | Plain | 3/8-16 | heavy square nut b18.2.2 | 233 |
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| Alma Bolt | MI | Square Nut | Plain | 3/8-16 | 3/8-16 plain finish | square nut | 139 |
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| Olander | CA | Square Nut | Steel | Zinc/Clear | 3/8-16 square nut stl zn | 709 |
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| Raw Produ | NJ | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 | square nuts 304 ss 3/8-16 | 500 |
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| THRDFAST | OK | Square Nut | Steel | Plain | 3/8-16 | square nut b18.2.2 | 230 |
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| Hodell | OH | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 reg square nut pln | 2500 |
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| American | WI | Square Nut | Grade 2 | Zinc/Clear | 3/8-16 | 3/8-16 nc reg square nut gr 2 zinc | 2130 |
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| Hodell | OH | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 reg square nut pln () | 2494 |
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| Valley Nu | WA | Square Nut | Steel | Galvanized | 3/8-16 | nc regular square nut hdg | 7 |
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| THRDFAST | OK | Square Nut | Steel | Zinc/Clear | 3/8-16 | square nut b18.2.2 | 10 |
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| Alma Bolt | MI | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 zinc plated | square nut | 146 |
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| Hodell | OH | Square Nut | Steel | Galvanized | 3/8-16 | 3/8-16 square nut hdg | 190 |
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| GLF | OH | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 sq nut stl zc | 850 |
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| American | WI | Square Nut | Grade 2 | Zinc/Clear | 3/8-16 | 3/8-16 nc hvy square nut gr 2 zinc | 87223 |
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| Hodell | OH | Square Nut | Steel | Galvanized | 3/8-16 | 3/8-16 square nut h.d.galv 37cnsqg | 190 |
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| OneMonroe | MA | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 4 proj sq unpiloted nut steel/plain | 80 |
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| Mansco | MI | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8-16 reg square nut 18-8 s.s. | 500 |
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| Raw Produ | NJ | Square Nut | 316, 317, A4 Stainless | Plain | 3/8-16 | square nuts 316 ss 3/8-16 | 464 |
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| GLF | OH | Square Nut | Steel | Plain | 3/8-16 | 3/8-16 sq nut stl pln | 1976 |
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| Raw Produ | NJ | Square Nut | Grade 2 | Galvanized | 3/8-16 | square nuts hdg grade 2-3/8-16 | 360 |
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| Hodell | OH | Square Nut | Steel | Zinc/Yellow | 3/8-16 | 3/8-16 reg square nut .00015/.0005zinc/yellow with certs & xray rpt to plating thkns per 51042-a01 | 463 |
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| Empire | WA | Square Nut | Steel | Zinc/Clear | 3/8-16 | 3/8-16 nc reg square nut zin | 600 |
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| Valley Nu | WA | Square Nut | Steel | Zinc/Black | 3/8-16 | nc regular square nut zb | 15 |
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| American | NY | Square Nut | Steel | Zinc/Clear | 3/8-24 | square nut pl | 900 |
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| FMP | MA | Square Nut | Steel | Zinc/Clear | 3/8-24 | square m/s nut | 2330 |
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| Jackson | MS | Square Nut | Steel | Zinc/Clear | 3/8 | nc square nut | 1449 |
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| ACCURATE | IL | Square Nut | Steel | Phosphate | 3/8 | c12009-014-4 .375 rectangular black phos (tinnerman type nut old# c13727-014-4) | 184 |
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| Jackson | MS | Square Nut | Steel | Plain | 3/8 | nc square nut | 953 |
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| Jackson | MS | Square Nut | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/8 | nc 18-8 304 square nut | 167 |
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| Mansco | MI | Square Nut | Brass | Plain | 3/8-16 5/8 1/4 | 3/8-16 square m/s nut brass 5/8 a/f .250 thk | 450 |
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