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1/4-28 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.
197,462 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 | 1/4-28 x 1 | slotted truss 18-8 | 715 |
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| ISSCO | MO | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 1/4 | phillips pan 18-8 | 940 |
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| ISSCO | MO | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 2 | slotted flat | 8200 |
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| ISSCO | MO | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | slotted flat | 8800 |
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| Buy Machine Screws from one of our FCH Network Members | ||||||||
| YANKEE | NH | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 | 1/4-28 x 1 slotted flat m/s zinc pltd | 160 |
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| YANKEE | NH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 | 1/4-28 x 1 phil pan m/s stain steel | 90 |
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| YANKEE | NH | Machine Screw | Steel | Plain | 1/4-28 x 1 1/2 | 1/4-28 x 1 1/2 slotted fillister m/s plain | 15 |
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| YANKEE | NH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/8 | 1/4-28 x 3/8 slotted pan m/s stain steel | 2095 |
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| YANKEE | NH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 5/8 | 1/4-28 x 5/8 slotted truss m/s stain steel | 96 |
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| YANKEE | NH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | 1/4-28 x 3/4 phil pan m/s stain steel | 125 |
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| YANKEE | NH | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | slotted pan m/s | 1976 |
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| MESAFAST | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 2 | phillips flat 100 deg mach 18-8 ss | 94.0 |
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| MESAFAST | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | phillips flat 100 deg mach 18-8 ss | 85.0 |
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| MESAFAST | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1/2 | phil flat machine 18-8 ss | 203.0 |
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| Jackson | MS | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1/2 | nf fl phillips m/s 18-8 304 | 25 |
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| Jackson | MS | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 1/4 | nf fl phillips m/s 18-8 304 | 13 |
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| Jackson | MS | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 1/2 | nf pan phillips m/s 18-8 304 | 15 |
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| MAINSOURC | NH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | 1/4-28x3/4 phil pan m/s 18-8 ss | 205 |
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| Weaver | WA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1/2 | 1/4-28x1/2 slotted round machine screw 18-8 ss | 75 |
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| Weaver | WA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1/2 | 1/4-28x1/2 phil flat machine screw 18-8 ss | 200 |
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| Weaver | WA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 1/4 | 1/4-28x1 1/4 phil flat machine screw 18-8 ss | 400 |
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| METRO IND | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 1/4 | slotted flat m/s SAE s/s | 200 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1/2 | phil flat m/s s/s 18-8 1/4-28x1/2 | 4339 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | fillister slotted m/s s/s 18-8 1/4-28x3/4 | 970 |
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| NAPPCO | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 3/4 | fillister slotted m/s s/s 18-8 1/4-28x1-3/4 | 80 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 1/4 | slotted round m/s | 37450 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/4 | phil round m/s (fine thread) | 74400 |
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| ACCURATE | IL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | slotted flat m/s 18-8 s/s (fine thread) | 100 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | slotted flat m/s | 36460 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | slotted fillister m/s | 2700 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | slotted round m/s | 127600 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/4 | slotted flat m/s | 70600 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/4 | slotted round m/s | 50788 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 | slotted flat m/s | 8900 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 1/2 | slotted round m/s | 800 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/4 | phillips truss m/s | 60563 |
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| ACCURATE | IL | Machine Screw | Steel | Plain | 1/4-28 x 1/2 | slotted fillister m/s | 2900 |
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| ACCURATE | IL | Machine Screw | Brass | Plain | 1/4-28 x 1/2 | slotted round m/s | 20150 |
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| ACCURATE | IL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | slotted round m/s 18-8 s/s | 80 |
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| ACCURATE | IL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/8 | slotted fillister (fine) | 119166 |
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| Hayes | CA | Machine Screw | Superalloy (Inconel, Hastelloy, Alloy 20) | Plain | 1/4-28 x 3/4 | nas1101e4-12 1/4-28 x 3/4 offset cruciform fill m/s | 49 |
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| American | NY | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 1 1/4 | phil pan m/s yellow | 1500 |
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| American | NY | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | phil pan m/s 18-8 304 | 34 |
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| American | NY | Machine Screw | Steel | Nickel Plated | 1/4-28 x 1/4 | unslotted indented hex m/s pl | 2500 |
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| American | NY | Machine Screw | Steel | Cadmium | 1/4-28 x 3/8 | slotted round m/s cad pl | 300 |
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| American | NY | Machine Screw | Steel | Plain | 1/4-28 x 3/8 | slotted binding undercut m/s | 20700 |
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| American | NY | Machine Screw | Steel | Cadmium | 1/4-28 x 3/8 | slotted flat 100 degrees m/s cad pl | 3000 |
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| American | NY | Machine Screw | Steel | Plain | 1/4-28 x 7/16 | phil oval undercut m/s | 10000 |
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| American | NY | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | slotted pan m/s pl | 3000 |
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| American | NY | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | slotted flat m/s pl | 640 |
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| American | NY | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | phil round m/s pl | 400 |
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| American | NY | Machine Screw | Steel | Cadmium | 1/4-28 x 1/2 | phil oval m/s cad pl | 10000 |
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| American | NY | Machine Screw | Steel | Plain | 1/4-28 x 9/16 | slotted pan m/s | 4500 |
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| American | NY | Machine Screw | Steel | Plain | 1/4-28 x 5/8 | phil pan m/s | 2800 |
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| American | NY | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 5/8 | phil flat m/s yellow | 350 |
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| American | NY | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/4 | phil truss m/s pl | 16850 |
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| American | NY | Machine Screw | Steel | Plain | 1/4-28 x 7/8 | slotted oval m/s | 8000 |
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| American | NY | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 7/8 | phil flat 100 degrees yellow | 11300 |
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| American | NY | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 7/8 | phil flat m/s yellow | 1400 |
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| American | NY | Machine Screw | Steel | Cadmium | 1/4-28 x 1 | slotted fillister m/s cad pl | 4000 |
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| American | NY | Machine Screw | Steel | Plain | 1/4-28 x 1 | slotted flat m/s | 500 |
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| RCFast | AZ | Machine Screw | Steel | Plain | 1/4-28 x 1.000 | 1/4-28x1 phillips flat 100 deg m/s stl cad yellow 24693s298 MS24693S298 | 150 |
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| Ababa | CA | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 1 5/16 | 1/4-28 x 1 5/16 p-flat 100 deg m/s stl yel znc b18.6.3 | 4019 |
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| Ababa | CA | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 3/8 | 1/4-28 x 1 3/8 p-flat 100 deg m/s stl znc b18.6.3 | 1016 |
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| Ababa | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/8 | 1/4-28 x 3/8 s-flat m/s u/cut s/s b18.6.3 | 300 |
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| Ababa | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 5/8 | 1/4-28 x 5/8 p-flat 100 deg m/s s/s b18.6.3 | 278 |
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| Ababa | CA | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 3/4 | 1/4-28 x 3/4 p-flat 100 deg m/s stl yel znc b18.6.3 | 200 |
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| Ababa | CA | Machine Screw | Steel | Nickel Plated | 1/4-28 x 3/4 | 1/4-28 x 3/4 s-oval m/s stl nkl b18.6.3 | 138 |
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| Ababa | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 | 1/4-28 x 1 p-pan m/s s/s b18.6.3 | 50 |
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| Weaver | WA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | 1/4-28x3/4 phil pan machine screw 18-8 ss | 510 |
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| Ababa | CA | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 3/8 | 1/4-28 x 1 3/8 p-flat 100 deg m/s stl znc b18.6.3 | 50 |
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| Ababa | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 5/8 | 1/4-28 x 5/8 p-pan m/s s/s b18.6.3 | 50 |
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| Hayes | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | ms24693c296 1/4-28 x 3/4 p-flat 100 deg 18-8ss | 730 |
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| Hayes | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 3/8 | ms24693c301 1/4-28 x 1-3/8 p-flat 100 deg 18-8ss | 616 |
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| MFS | KS | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 5/16 | phillips pan | 206 |
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| MFS | KS | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/8 | phillips pan | 772 |
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| MFS | KS | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 3/4 | phillips round | 355 |
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| MFS | KS | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 7/16 | slotted truss locking | 254 |
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| MFS | KS | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 5/8 | phillips flat | 212 |
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| MFS | KS | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 | phillips round | 2151 |
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| MFS | KS | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 5/8 | slotted pan | 79 |
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| MFS | KS | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 1/2 | phillips pan | 16 |
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| Weaver | WA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | 1/4-28x3/4 slotted round machine screw 18-8 ss | 100 |
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| TSFINC | TN | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 5/8 | slotted flat head machine screw, stainless steel 18-8 nf thread | 3000 |
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| Purchase | MO | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/4 | 1/4-28 x 3/4 slotted flat ms zinc | 5778 |
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| OneMonroe | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/8 | screw mach. 1/4-28x3/8 pan/phl s/s | 109 |
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| OneMonroe | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1.0 | screw mach. 1/4-28x1.0 pan/slot s/s | 140 |
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| OneMonroe | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 1/2 | screw mach. 1/4-28x1-1/2 ft8/phil ss | 840 |
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| QFC | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | 1/4-28x3/4 phil pan m/s 18-8 b18.6.3 | 75 |
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| FTS | OH | Machine Screw | Steel | Plain | 1/4-28 x 3/8 | ms51960-80 s/s phil flat m/s 1/4-28 x 3/8 | 420 |
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| Delta Secondary | IL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/8 | Phillips Truss18-8 Stainless | 500 |
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| Delta Secondary | IL | Machine Screw | Steel | Plain | 1/4-28 x 5/16 | Phillips Round | 1265 |
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| SIS | AZ | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 1 3/8 | 1/4-28x1-3/8 unslotted hex washer machine screw steel zinc yellow | 105500 |
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| SIS | AZ | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 | 1/4-28x1 phillips flat head machine screw 18-8 304 steel | 100 |
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| B & K FAST | PA | Machine Screw | Aluminum | Plain | 1/4-28 x 1/4 | 1/4-28 x 1/4 slotted oval machine screws alum b18.6.3 | 494 |
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| B & K FAST | PA | Machine Screw | Steel | Black Oxide | 1/4-28 x 1/2 | 1/4-28 x 1/2 phil oval machine screw blk oxide b18.6.3 | 170 |
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| B & K FAST | PA | Machine Screw | Steel | Plain | 1/4-28 x 4 7/8 | 1/4-28 x 4 7/8 non-countersunk flat head machine screws 90 bend & 2 thread b18.6.3 | 2706 |
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| B & K FAST | PA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 | 1/4-28 x 1 phil flat machine screws 18-8 ss b18.6.3 | 84 |
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| B & K FAST | PA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1/2 | 1/4-28 x 1/2 phil pan machine screws stainless b18.6.3 | 628 |
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| B & K FAST | PA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 7/8 | 1/4-28 x 7/8 phil pan machine screws 18-8 ss b18.6.3 | 200 |
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| B & K FAST | PA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3 | 1/4-28 x 3 slotted round machine screws 18-8 ss b18.6.3 | 4 |
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| Lubker Di | PA | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/4 | 1/4-28 (nf)x3/4 phil pan m/s zp | 1285 |
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| TSF | TX | Machine Screw | Steel | Plain | 1/4-28 x 3/8 | slotted fillister m/s drilled hd 1/4-28 x 3/8 | 75 |
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| ACF | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 4 1/2 | 1/4-28x4-1/2 s/s hwh m/s 1 t/l per print | 3081 |
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| ACF | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Black Oxide | 1/4-28 x 1/2 | 1/4-28x1/2 s/s phil pan m/s black oxide | 63 |
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| ACF | CA | Machine Screw | Steel | Zinc/Yellow | 1/4-28 x 5/8 | 1/4-28x5/8 phillips flat m/s zinc ii | 40 |
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| ACF | CA | Machine Screw | Steel | Black Oxide | 1/4-28 x 1 | 1/4-28x1 phillips flat m/s black oxide | 700 |
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| ACF | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 2 1/2 | 1/4-28x2-1/2 s/s phillips pan m/s | 99 |
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| ACF | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 2 1/4 | 1/4-28x2-1/4 s/s phillips pan m/s | 99 |
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| ACF | CA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 7/8 | 1/4-28x7/8 s/s phillips pan m/s | 50 |
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| ACF | CA | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 3/8 | 1/4-28x3/8 phillips round m/s z/p rohs | 360 |
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| Wurth Ada | MN | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 5/8 | scr m/s pan (18 8) phillips 1/4-28x5/8 | 21 |
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| Wurth Ada | MN | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | scr m/s hex steel (zn) slotted 1/4-28x1/2 | 3,309 |
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| Wurth Ada | MN | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/4 | scr m/s pan (18 8) phillips 1/4-28x3/4 | 2,959 |
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| Wurth Ada | MN | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/8 | scr m/s flat 82 deg (18 8) phillips 1/4-28x3/8 | 2,550 |
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| Wurth Ada | MN | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1/2 | scr m/s pan (18 8) phillips 1/4-28x1/2 | 3,800 |
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| BAYFASTCO | FL | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1 | phillips pan head s | 3000 |
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| BAYFASTCO | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1/2 | slotted pan head | 3799 |
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| OBRIEN | OH | Machine Screw | Steel | Zinc/Clear | 1/4-28 x 1/2 | slotted flat ms | 1950 |
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| OBRIEN | OH | Machine Screw | Steel | Plain | 1/4-28 x 25/32 | nas517-4-5 | 250,000 |
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| OBRIEN | OH | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 1 3/4 | phillips flat m/s 18-8 304 | 699 |
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| FACCA | Ont | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/4-28 x 3/8 | unc flat slot undercut | 400 |
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