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SEMS Machine Screws

SEMS® Machine Screws are machine screws with pre-assembled captive washers, designed to speed total assembly time in a manufacturing process.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
CenturyFLSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 1/21/4-20 x 1/2 slotted ind.hex wash.hd.m/s 18-81900
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CenturyFLSems Machine ScrewSteelZinc/ClearM3 x 8m3 x 8 phillips pn double sems f/w & l/w zinc e2a1935
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CenturyFLSems Machine ScrewSteelZinc/Yellow#4-40 x 5/164-40 x 5/16 phillips pan w/med split l/w steel zi & yel zinc/yellow1940
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CenturyFLSems Machine ScrewSteelZinc/Clear1/4-20 x 1/21/4-20 x 1/2 ind hex hd 7/16 across the flats w/ext sems stl zinc1983
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CenturyFLSems Machine ScrewGrade 2Zinc/Clear#10-32 x 5/810-32 x 5/8 slotted pan hd external washer sems screw grade 2 zinc plated2000
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CenturyFLSems Machine ScrewSteelZinc/Clear#4-40 x 1/24-40 x 1/2 phillips pan square cone sem steel trivalent zinc rohs compliant2000
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CenturyFLSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 5/166-32 x 5/16 phillips pan hd int l/w 18-82045
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CenturyFLSems Machine ScrewSteelZinc/ClearM4 x 18mi418epp m4 x 18mm phillips pan ext sems stl zinc rohs2168
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CenturyFLSems Machine ScrewSteelZinc/Yellow1/4-20 x 5/81/4-20x5/8 slottedpan with ext sems zy 1/4-20x5/8 slottedpan with ext sems zy2200
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CenturyFLSems Machine ScrewSteelZinc/Yellow1/4-20 x 7/81/4-20x7/8 slottedpan with ext sems zy 1/4-20x7/8 slottedpan with ext sems zy2200
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CenturyFLSems Machine ScrewSteelZinc/Clear#8-32 x 3/88-32 x 3/8 slottedpan ext sems mach screw sems mach screw steel trivalent clear bake2400
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CenturyFLSems Machine ScrewSteelZinc/ClearM3 x 10m3 x 10mm phillips pan double wsh sems 8mm f/w stl zinc rohs clear2400
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CenturyFLSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 3/46-32 x 3/4 phillips pan ext sems 18/83841
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CenturyFLSems Machine ScrewSteelZinc/Clear#4-40 x 5/164-40 x 5/16 phillips pan hd int l/w steel zinc8311
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CenturyFLSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)PlainM3 x 6m3 x 6 phillips pan sems ext (5.85mm) l/w 18-88320
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CenturyFLSems Machine ScrewSteelZinc/Black#8-32 x 3/88-32 x 3/8 phillips pan hd int l/w steel black zinc8500
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CenturyFLSems Machine ScrewSteelZinc/Clear#6-32 x 3/46-32 x 3/4 (t15)torx pan hd sq cone sems steel zinc rohs clear8500
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CenturyFLSems Machine ScrewSteelZinc/Black#8-32 x 5/88-32 x 5/8 phillips pan hd int l/w steel zinc black9500
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CenturyFLSems Machine ScrewSteelZinc/ClearM3 x 5m3x5 phillips pan sems screw steel/zinc m3x5 phillips pan sems screw with split lockwasher sems steel/zinc9700
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CenturyFLSems Machine ScrewSteelZinc/Clear#6-32 x 5/166-32 x 5/16 tx plus pan int lw sems 6-32 x 5/16 6-lobe plus int tooth lw sems m/s stl zn clr bake rohs compl.9890
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