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#4-40 Machine Screws
Machine Screws are uniformly threaded screws which are designed to be screwed into pre-drilled, pre-threaded holes, or in conjunction with a nut, usually with a diameter less than 1/4inch. Larger diameter machine screws with a hex head are usually referred to as machine bolts.
201,904 Machine Screw, showing 200, (click on any line for more information)
| Search Results Sponsored by ISSCO, Inc., your source for Machine Screws. For more results, visit isscoinc.com | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| ISSCO | MO | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/8 | slotted fillister w/ 1/32 drilled head 18-8 stainless | 1336 |
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| ISSCO | MO | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/2 | phillips pan 18-8 stainless | 20200 |
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| ISSCO | MO | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 5/16 | phillips pan 18-8 stainless | 12600 |
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| ISSCO | MO | Machine Screw | Steel | Zinc/Clear | #4-40 x 1/2 | torx pan patchlok | 9280 |
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| Buy Machine Screws from one of our FCH Network Members | ||||||||
| Cal Fastenrs | CA | Machine Screw | Steel | Black Oxide | #4-40 x 5/8 | phil pan m/s black ox | 5,000 |
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| Cal Fastenrs | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Black Oxide | #4-40 x 3/16 | 4-40 x 3/16 phil pan m/s 18-8 304 | 3,800 |
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| Cal Fastenrs | CA | Machine Screw | Nylon (Polyamide) | Plain | #4-40 x 1 1/2 | slotted flat m/s | 500 |
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| Cal Fastenrs | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Black Oxide | #4-40 x 1/2 | slotted pan m/s 18-8 304 | 500 |
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| Cal Fastenrs | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | slotted oval m/s 18-8 304 | 3,000 |
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| Cal Fastenrs | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Black Oxide | #4-40 x 1/4 | 4-40 x 1/4 phil flat m/s 100 degree s.s. black oxi phillips flat ms | 1,050 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 3/4 | binder slotted m/s s/s 18-8 4-40x1-3/4 | 3580 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 1/4 | flat slotted m/s s/s 18-8 4-40x1-1/4 | 145 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/8 | flat slotted m/s s/s 18-8 4-40x1/8 | 1897 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 5/32 | flat slotted u-cut m/s s/s 18-8 4-40x5/32 | 3815 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/16 | flat slotted u-cut m/s s/s 18-8 4-40x3/16 | 6602 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/16 | fillister slotted m/s s/s 18-8 4-40x3/16 | 226 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/4 | fillister slotted m/s s/s 18-8 4-40x3/4 | 252 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/4 | phil binder m/s s/s 18-8 4-40x3/4 | 93 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/2 | phil binder m/s s/s 18-8 4-40x1/2 | 1580 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 7/8 | phil flat m/s s/s 18-8 4-40x7/8 | 1450 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Passivated | #4-40 x 1/4 | phil flat m/s s/s 4-40x1/4 passivated | 150 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 1/16 | phil flat m/s s/s 18-8 4-40x1-1/16 | 630 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/8 | phil flat m/s w/patch s/s18-8 4-40x3/8 | 6500 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 3/8 | phil flat m/s s/s 18-8 4-40x1-3/8 | 50 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | 4-40x1/4 s/s phillips flat undercut m/s rohs/reach patch | 11500 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 7/16 | phil fillister m/s s/s 18-8 4-40x7/16 | 513 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/16 | phil fillister m/s s/s 18-8 4-40x3/16 | 68 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | phil oval m/s s/s 18-8 4-40x1/4 | 406 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 | phil oval m/s s/s 18-8 4-40x1 | 477 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/2 | phil oval m/s s/s 18-8 4-40x1/2 | 1856 |
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| IndexFast | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/8 | M440x037pfss 4-40 x 3/8 phillips flat machine screw stainless steel | inquire |
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| IndexFast | CA | Machine Screw | Steel | Black Oxide | #4-40 x 1/2 | M440x050ppsbo 4-40 x 1/2 phillips pan machine screw steel/black oxide | inquire |
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| IndexFast | CA | Machine Screw | Steel | Black Oxide | #4-40 x 1/4 | M440x025ppsb 4-40 x 1/4 phillips pan machine screw steel/black | inquire |
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| IndexFast | CA | Machine Screw | Steel | Black Oxide | #4-40 x 1/4 | M440x025pfsb 4-40 x 1/4 phillips flat machine screw steel/black | inquire |
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| SWACO | OH | Machine Screw | Steel | Plain | #4-40 x 1/4 | 4-40x1/4 torx pan ms w/crest cup | 2700 |
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| SWACO | OH | Machine Screw | Steel | Plain | #4-40 x 1/2 | 4-40x1/2 torx pan ms w/crest cup | 3000 |
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| SWACO | OH | Machine Screw | Steel | Zinc/Clear | #4-40 x 1/4 | 4-40x1/4 phil pan head ms steel zinc with light nylon patch rohs compliant | 7991 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/8 | 4-40x1/8 phillips flat ms 100 18-8 | 400 |
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| SWACO | OH | Machine Screw | Steel | Black Oxide | #4-40 x 3/16 | 4-40x3/16 phillips flat undercut ms stl blk ox | 5320 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 5/16 | #4-40x5/16 6-lobe pn ms 18-8 | 5000 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/16 | 4-40x3/16 phillips flat undercut ms 18-8 w/patch | 2984 |
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| SWACO | OH | Machine Screw | Steel | Zinc/Clear | #4-40 x 1/4 | 4-40x1/4 phillips pn ms st zinc | 3962 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3 | 4-40x3 phillips pn ms 18-8 | 690 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/4 | 4-40x3/4 phillips pn ms 18-8 | 6400 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 2 1/2 | 4-40x2 1/2 phillips pn ms 18-8 | 270 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/2 | 4-40x1/2 phillips pn ms 18-8 | 29321 |
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| SWACO | OH | Machine Screw | Steel | Zinc/Clear | #4-40 x 1/2 | 4-40x1/2 phillips pn ms stl zinc | 37514 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/8 | 4-40x3/8 phillips pn ms 18-8 | 4388 |
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| SWACO | OH | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/4 | 4-40x3/4 phillips pn ms stl zinc | 5801 |
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| SWACO | OH | Machine Screw | Steel | Zinc/Clear | #4-40 x 7/8 | 4-40x7/8 phillips pn ms stl zinc | 2654 |
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| SWACO | OH | Machine Screw | Steel | Zinc/Clear | #4-40 x 1 | 4-40x1 phillips pn ms stl zinc | 4942 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/16 | 4-40x3/16 phillips flat ms 100 18-8 | 2235 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | 4-40x1/4 phillips flat ms 100 deg 18-8 | 1058 |
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| SWACO | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/16 | 4-40x3/16 phillips pn ms 18-8 | 12959 |
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| Delta | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/8 | phil flat ms 18-8 sst #4-40x3/8 | 49 |
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| Delta | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | slotted binder m/s 18-8 sst #4-40x1/4 | 700 |
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| Delta | TX | Machine Screw | 316, 317, A4 Stainless | Plain | #4-40 x 1/4 | slotted round m/s 316 sst #4-40x1/4 | 48 |
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| AIH | AZ | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/8 | phil flat m/s-undercut-s/s | 3516 |
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| Liberty | IL | Machine Screw | Grade 8 | Zinc/Clear | #4-40 x 3/8 | phil flat gr 8 rohs w/material certs per print 459800266311 w/mat erial certs per print 459800266311 | 56,976 |
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| Liberty | IL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 11/16 | phil flat 100 18-8 s/s | 1,100 |
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| Liberty | IL | Machine Screw | Brass | Plain | #4-40 x 5/8 | phil flat | 100 |
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| Liberty | IL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/8 | phil pan 18-8 s/s | 6,204 |
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| Liberty | IL | Machine Screw | Steel | Black Oxide | #4-40 x 5/16 | phil pan black ox | 4,380 |
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| Liberty | IL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | phil pan 18-8 s/s with blue nylon patch 18-8 s/s with blue nylon patch | 2,400 |
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| Liberty | IL | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/4 | phillips pan | 5,500 |
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| Liberty | IL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/16 | phil pan 18-8 s/s | 5,300 |
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| Liberty | IL | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/8 | phil hex washer rohs | 1,300 |
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| Liberty | IL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | slotted flat 18-8 | 1,590 |
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| Liberty | IL | Machine Screw | Steel | Plain | #4-40 x 1/2 | slotted fillister mix plate w mix plate | 1,800 |
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| Liberty | IL | Machine Screw | Steel | Black Oxide | #4-40 x 9/16 | slotted pan | 1,700 |
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| SJS Prod | CA | Machine Screw | Nylon (Polyamide) | Plain | #4-40 x 1/4 | f/h slot m/s nylon 4-40x1/4 | 3100 |
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| Olander | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x .800 | 4-40 x .800 slotted fillister hd sst () | 30258 |
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| Olander | CA | Machine Screw | Steel | Plain | #4-40 x 1 3/4 | 440 x 1 3/4 crucifrm pan f/t alloy cad2 () | 12232 |
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| Olander | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | 4-40 x 1/4 phil pan ifi 124 nlt ss () | 45831 |
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| Olander | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 3/8 | 4-40 x 1 3/8 phil pan ms sst () | 15007 |
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| Olander | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | 4-40 x 1/4 phil pan light patch ss () | 10736 |
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| Olander | CA | Machine Screw | Steel | Plain | #4-40 x 1/2 | 440 x 1/2 phil pan ss blk () | 2265 |
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| Olander | CA | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/8 | 4-40 x 3/8 phil flat u/c stl blk rohs () () | 4036 |
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| Olander | CA | Machine Screw | Steel | Plain | #4-40 x 3/8 | 440 x 3/8 slotted flat 100 deg nyl () | 5210 |
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| Olander | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 1/2 | 4-40 x 1 1/2 phil flat 100 dg ms ss () | 2759 |
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| Olander | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/4 | 4-40 x 1/4 phil flat ms sst () () | 555 |
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| Olander | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Black Oxide | #4-40 x 3/4 | 440 x 3/4 phil pan ss blk () | 112 |
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| Olander | CA | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/16 | 4-40 x 3/16 phil flat 100 deg zn cr3 () () | 10419 |
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| Global | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Passivated | #4-40 x 1/2 | phil pan m/s type-f 18-8 ss passivate passivate | 2,835 |
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| MidStates | MI | Machine Screw | Steel | Zinc/Black | #4-40 x 1/4 | phillips truss m/s blk znc | 7294 |
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| MidStates | MI | Machine Screw | Steel | Zinc/Clear | #4-40 x 1 3/8 | phil pan m/s znc | 2136 |
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| MidStates | MI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 7/8 | slotted flat m/s 18-8 | 414 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 | 4-40x1 slotted pan m/s 18-8 304 b18.6.3 | 100 |
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| OSSCO | RI | Machine Screw | Nylon (Polyamide) | Plain | #4-40 x 1 | 4-40x1 slotted round m/s nylon b18.6.3 | 200 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 | 4-40x1 phil pan m/s 18-8 304 b18.6.3 | 107 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 | 4-40x1 slotted round m/s 18-8 304 b18.6.3 | 100 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 | 4-40x1 phil truss m/s 18-8 304 b18.6.3 | 1,146 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 1/4 | 4-40x1 1/4 phil flat m/s 18-8 304 b18.6.3 | 290 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1/8 | 4-40x1/8 phil pan m/s 18-8 304 b18.6.3 | 1,000 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | #4-40 x 1 1/2 | 4-40x1 1/2 slotted pan m/s plated b18.6.3 | 100 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | #4-40 x 1 1/2 | 4-40x1 1/2 slotted round m/s plated b18.6.3 | 861 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 1/2 | 4-40x1 1/2 phil pan m/s 18-8 304 b18.6.3 | 50 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 1 3/4 | 4-40x1 3/4 slotted pan m/s 18-8 304 b18.6.3 | 98 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | #4-40 x 1 3/4 | 4-40x1 3/4 phil flat m/s plated b18.6.3 | 607 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/16 | 4-40x3/16 slotted binder m/s-undercut-plated b18.6.3 | 6,374 |
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| OSSCO | RI | Machine Screw | Steel | Black Oxide | #4-40 x 3/16 | 4-40x3/16 slotted pan m/s black ox b18.6.3 | 10,844 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | #4-40 x 3/16 | 4-40x3/16 phil pan m/s 18-8 304 b18.6.3 | 241 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | #4-40 x 1/4 | 4-40x1/4 slotted binder m/s-undercut-plated b18.6.3 | 5,250 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | #4-40 x 1/4 | 4-40x1/4 slotted flat m/s plated b18.6.3 | 1,700 |
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| Wurth Ind | D.F. | Machine Screw | Steel | Zinc/Clear | #4-40 x 5/8 | 4-40 x 5/8 phil pan m/s zn | - |
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| Wurth Ind | D.F. | Machine Screw | Steel | Plain | #4-40 x 3/8 | 4-40 x 3/8 slot round m/s | - |
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| Wurth Ind | D.F. | Machine Screw | Steel | Zinc/Clear | #4-40 x 1/4 | 4-40 x 1/4 slot round m/s zn | 9,800 |
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| Wurth Ind | D.F. | Machine Screw | Steel | Phosphate | #4-40 x 3/8 | 4-40 x 3/8 slot pan m/s phos & oil | - |
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| Wurth Ind | D.F. | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/4 | 4-40 x 3/4 slot pan m/s zinc | - |
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| CFI | IL | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/8 | pan phillips | 15,000 |
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| CFI | IL | Machine Screw | Steel | Zinc/Clear | #4-40 x 1 | pan phillips | 5,000 |
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| CFI | IL | Machine Screw | Steel | Zinc/Clear | #4-40 x 1/4 | in hex unslot | 1,910 |
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| CFI | IL | Machine Screw | Steel | Zinc/Clear | #4-40 x 3/16 | pan phillips | 10,000 |
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