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1/2 inch length SEMS Machine Screws (ASME B18. 13)

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

117 results, (click on any line for more information)

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
Irwin IndOntSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8-32 x 1/28-32x1/2 pan torx ext tooth l/w sems stainless steel b18.13226
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Irwin IndOntSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated1/4-20 x 1/21/4-20 x 1/2 ind hex ext sems (7/16 a/f) s/s and passivate b18.133000
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Irwin IndOntSems Machine ScrewSteelZinc/Clear#10-32 x 1/210-32 x 1/2 pan phil ext sems m/screw zinc trivalent clear b18.13990
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Irwin IndOntSems Machine ScrewSteelZinc/Clear#8-32 x 1/28-32 x 1/2 pan phil int sems m/s steel zinc trivalent clear b18.131000
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Irwin IndOntSems Machine ScrewSteelZinc/Clear#4-40 x 1/24-40 x 1/2 pan phil sq. cone sems m/s stl znc trival clr b18.133500
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Irwin IndOntSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 1/24-40x1/2 pan phil int sems m/s 18.8 s/s b18.132030
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Irwin IndOntSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 1/26-32x1/2 pan phl ext sems m/s 18-8 304 steel b18.131000
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GLFOHSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 1/2#6-32x1/2 phil pan hd sems internal l/w 18-8 s/s b18.13 () () ()2722
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GLFOHSems Machine ScrewSteelZinc/Yellow#6-32 x 1/2#6-32x1/2 phil pan hd sems external l/w stl zy b18.13 () () ()10000
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GLFOHSems Machine ScrewSteelZinc/Clear#6-32 x 1/2#6-32x1/2 phil pan hd sems internal l/w stl zc b18.13 () () ()2863
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GLFOHSems Machine ScrewSteelZinc/Clear#8-32 x 1/2#8-32x1/2 phil pan hd sems internal l/w stl zc b18.13 () () ()580
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GLFOHSems Machine ScrewSteelZinc/Clear#10-32 x 1/2#10-32x1/2 phil pan hd sems external l/w stl zc b18.13 () () ()3473
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GLFOHSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1/2#10-32x1/2 phil pan sems int 6-lobe 18-8 s/s b18.13 () () ()3130
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GLFOHSems Machine ScrewSteelZinc/Clear#10-32 x 1/2#10-32x1/2 phil pan hd sems internal l/w stl zc b18.13 () () ()2040
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GLFOHSems Machine ScrewSteelZinc/Clear#10-24 x 1/2#10-24x1/2 phil pan hd sems external l/w stl zc b18.13 () () ()200
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GLFOHSems Machine ScrewSteelZinc/Clear#8-32 x 1/2#8-32x1/2 phil pan hd sems external l/w stl zc b18.13 () () ()3330
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AbabaCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1/210-32 x 1/2 p-pan sem int wsh m/s s/s b18.133081
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AbabaCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1/210-32 x 1/2 p-pan sem sqr-cn s/s b18.132335
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AbabaCASems Machine ScrewSteelBlack Oxide#10-32 x 1/210-32 x 1/2 p-pan sems int wsh m/s stl blk ox wax b18.134000
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AbabaCASems Machine ScrewSteelZinc/Clear#10-32 x 1/210-32 x 1/2 p-pan sems int wsh m/s stl znc b18.1310348
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AbabaCASems Machine ScrewSteelZinc/Clear1/4-20 x 1/21/4-20 x 1/2 p-pan sem int wsh m/s steel znc b18.13200
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AbabaCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 1/24-40 x 1/2 p-pan sems int wsh m/s s/s b18.135325
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AbabaCASems Machine ScrewSteelZinc/Clear#4-40 x 1/24-40 x 1/2 p-pan sems ext wsh m/s stl znc b18.13700
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AbabaCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 1/26-32 x 1/2 p-pan sems int wsh m/s s/s b18.1312022
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AbabaCASems Machine ScrewSteelZinc/Clear#6-32 x 1/26-32 x 1/2 p-pan sems ext wsh m/s stl znc b18.13800
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AbabaCASems Machine ScrewSteelZinc/Clear#6-32 x 1/26-32 x 1/2 p-pan int sem stl znc b18.131923
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AbabaCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8-32 x 1/28-32 x 1/2 p-pan sems int wsh m/s s/s b18.136015
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AbabaCASems Machine ScrewSteelZinc/Clear#8-32 x 1/28-32 x 1/2 p-pan sems int wsh m/s stl znc b18.135225
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AbabaCASems Machine ScrewSteelBlack Oxide#6-32 x 1/26-32 x 1/2 p-pan int sem stl blk ox wax b18.13500
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AbabaCASems Machine ScrewSteelZinc/Clear#10-32 x 1/210-32 x 1/2 p-pan sems int wsh m/s stl znc b18.13100
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AbabaCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 1/26-32 x 1/2 p-pan sems int wsh m/s s/s b18.131041
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AbabaCASems Machine ScrewSteelZinc/Clear#8-32 x 1/28-32 x 1/2 p-pan sems int wsh m/s stl znc b18.13100
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EximS'poreSems Machine ScrewSteelZinc/Clear#6-32 x 1/2screw indented hex washer head slottedsteel blue zn#6-32 x 1/2 in b18.1343560
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EximS'poreSems Machine ScrewSteelNickel Plated#10-32 x 1/2screw pan washer head phillips recesssteel 1020 bright nickel#10-32 x 1/2 in b18.1315682
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EximS'poreSems Machine ScrewSteelZinc/Yellow#6-32 x 1/2screw pan head phillips-recesssteel yellow zn ext tooth lockwasher# 6-32 x 1/2 in. b18.13798
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EximS'poreSems Machine ScrewSteelZinc/Clear#6-32 x 1/2screw hex head steel clear trivalentw. ext tooth l/w# 6-32 x 1/2 in. [rohs] b18.1345696
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EximS'poreSems Machine ScrewSteelZinc/Clear#6-32 x 1/2screw pan head phillips-recess [rohs]steel clear trivalent w. ext tooth l/w# 6-32 x 1/2 in. b18.139074
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EximS'poreSems Machine ScrewSteelZinc/Clear#6-32 x 1/2screw pan head phillips-recesssteel clear zn w. internal tooth l/wsher# 6-32 x 1/2 in unc 3a b18.132604
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EximS'poreSems Machine ScrewSteelZinc/Clear#6-32 x 1/2screw truss head phillips-recesssteel blue zn w. ext tooth lockwasher# 6-32 x 1/2 in b18.1384150
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EximS'poreSems Machine ScrewSteelZinc/Clear#6-32 x 1/2screw pan head phillips-recesssteel blue zn w. square cone washer# 6-32 x 1/2 in. b18.13864
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EximS'poreSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Passivated#2-56 x 1/2screw pan head phillips-recesss/s passivated w.split l/washer unc 2a# 2-56 x 1/2 in b18.139050
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EximS'poreSems Machine ScrewSteelZinc/Clear#10-24 x 1/2screw hex headsteel blue zn w. ext tooth lockwasher# 10-24 x 1/2 in. b18.13160
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EximS'poreSems Machine ScrewSteelZinc/Yellow#10-32 x 1/2screw pan head phillips-recesssteel yellow zn w.ext tooth l/w# 10-32 x 1/2 in. b18.13416
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EximS'poreSems Machine ScrewSteelZinc/Yellow#10-32 x 1/2screw pan head phillips-recessyellow trivalent w. ext tooth l/w# 10-32 x 1/2 in. b18.132925
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EximS'poreSems Machine ScrewSteelZinc/Clear#10-32 x 1/2screw hex headsteel clear zn w.ext tooth l/washer# 10-32 x 1/2 in b18.1340
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EximS'poreSems Machine ScrewSteelZinc/Clear#10-32 x 1/2screw hex head steel blue trivalentw. ext tooth lockwasher# 10-32 x 1/2 in b18.136755
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EximS'poreSems Machine ScrewSteelZinc/Clear#2-56 x 1/2screw pan head phillips-recesssteel blue zn w. int tooth lockwasher# 2-56 x 1/2 in b18.1317950
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EximS'poreSems Machine ScrewSteelPlain#4-40 x 1/2screw hex headsteel clr chrmt unc 2a w. ext tooth l/w# 4-40 x 1/2 in. b18.1315176
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EximS'poreSems Machine ScrewSteelZinc/Clear#4-40 x 1/2screw pan head phillips-recesssteel blue zn w.split lock washer# 4-40 x 1/2 in b18.1388579
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SIIINSems Machine ScrewSteelZinc/Clear#8 x 1/2screw rnd washr head #8 x 1/2 coarse znc b18.13508060
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1/210-32x1/2 phillips pan sem screw external tooth lock washer stainless steel 18-8 plain SXP10F50XZ/LET-3 b18.13913
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#10-32 x 1/210-32x1/2 phillips pan sem screw external tooth lock washer steel zinc 10F08PPBAMS SZ b18.131848
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JET FITTINGCASems Machine ScrewSteelZinc/Clear1/4-20 x 1/21/4-20x1/2 hex steel zinc w/square cone sems 1/4-20 X 1/2 HX HD steel zinc w/ square cone SEMS b18.134500
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JET FITTINGCASems Machine ScrewSteelPlain#6-32 x 1/26-32x1/2 phillips pn sq cone sems stl zi 12345. b18.1321000
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JET FITTINGCASems Machine ScrewSteelPlain1/4-20 x 1/21/4-20x1/2 phillips pn sq cone sems stl zi 1/4-20 x 1/2 PH PN SQ CONE SEMS STL ZI b18.1311000
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JET FITTINGCASems Machine ScrewSteelPlain#10-32 x 1/210-32x1/2 phillips pn sq cone sems stl zi 10-32 x 1/2 PH PN SQ CONE SEMS STL ZI b18.133000
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JET FITTINGCASems Machine ScrewSteelPlain#6-32 x 1/26-32x1/2 phillips pn i-sems st zi 6-32 X 1/2 PH PAN M/S STL ZI I-SEMS b18.137077
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 1/24-40x1/2 phillips pn dbl sem 18-8 (nas1301c4-8) b18.134100
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JET FITTINGCASems Machine ScrewSteelBlack Oxide#10-32 x 1/210-32x1/2 phillips pan sem screw cone washer steel black oxide and wax 10F08PPCAMS SBO b18.131985
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1/210-32x1/2 phillips pan sem screw internal tooth lock washer stainless steel 18-8 plain b18.13425
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JET FITTINGCASems Machine ScrewSteelPlain#4-40 x 1/24-40x1/2 phillips pn sq cone sems stl zi 4-40 x 1/2 PH PN SQ CONE SEMS STL ZI b18.1310000
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#6-32 x 1/26-32x1/2 phillips pn sq cone sem z b18.1321099
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1/210-32x1/2 phillips pn dbl sem 18-8 (nas1301c10-8) b18.13610
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 1/26-32x1/2 phillips pan sem screw external tooth lock washer stainless steel 18-8 plain SXP6C50SX/LET b18.1365
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#10-32 x 1/210-32x1/2 phillips pn sq cone sems stl zn 10-32 X 1/2 PH PN SQ CONE SEMS STL ZN b18.1320000
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JET FITTINGCASems Machine ScrewSteelPlain#8-32 x 1/28-32x1/2 phillips pn sq cone sems stl zi 8-32 X 1/2 PH PN SQ CONE SEMS STL ZI b18.1310000
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JET FITTINGCASems Machine ScrewSteelZinc/Black#10-32 x 1/210-32x1/2 phillips pan sem screw external tooth lock washer steel zinc black SXP10F50XB/LET-3 b18.13500
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JET FITTINGCASems Machine ScrewSteelZinc/Clear1/4-20 x 1/21/4-20x1/2 phillips pn steel zinc w/square cone sems 1/4-20 X 1/2 PH PN HD steel zinc w/ square cone SEMS b18.1310000
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QFCTXSems Machine ScrewSteelPlain#8 x 1/28x1/2 phil round washer head tapping b18.13300
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QFCTXSems Machine ScrewSteelZinc/Clear#10-32 x 1/210-32x1/2 hh slotted square cone sems zinc b18.137600
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QFCTXSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear#10-32 x 1/2#10-32x1/2 round head slotted m/s with helical spring l/w sems zinc (96 hrs sst white rust) rohs b18.1373800
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QFCTXSems Machine ScrewSteelZinc/Clear#12-24 x 1/212-24x1/2 phil pan external sems screw trivalent zinc b18.1364
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QFCTXSems Machine ScrewSteelPlain1/4-20 x 1/21/4-20x1/2 hh dished sems 1/2 od wash b18.13890
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QFCTXSems Machine ScrewSteelZinc/Clear1/4-20 x 1/21/4-20x1/2 pan head slotted m/s external tooth l/w sems zinc b18.131000
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QFCTXSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Zinc/Clear1/4-20 x 1/21/4-20x1/2 pan head slotted m/s external tooth l/w sems zinc (96 hrs sst white rust) rohs b18.13102501
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QFCTXSems Machine ScrewSteelPlain1/4-20 x 1/21/4-20x1/2 slotted hex ext sem screw b18.132364
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QFCTXSems Machine ScrewSteelPlain#4-40 x 1/24-40x1/2 phil pan ext sem screw b18.136974
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QFCTXSems Machine ScrewSteelPlain#4-40 x 1/24-40x1/2 slotted hex ext sem screw b18.1365907
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QFCTXSems Machine ScrewSteelZinc/Clear#6-32 x 1/26-32x1/2 hh slotted square cone sems zinc b18.134940
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QFCTXSems Machine ScrewSteelZinc/Clear#6-32 x 1/26-32x1/2 phillips pan sq cone sem zinc b18.134900
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QFCTXSems Machine ScrewSteelZinc/Yellow#6-32 x 1/26-32x1/2 phil pan ext sems zinc yellow b18.13953
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QFCTXSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8-32 x 1/28-32x1/2 phil pan sems sq conical screw ss b18.131500
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QFCTXSems Machine ScrewSteelPlain#8-32 x 1/28-32x1/2 hex slotted square cone sems b18.13750
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QFCTXSems Machine ScrewSteelPlain#8-32 x 1/28-32x1/2 hex slotted square cone sems b18.1322982
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QFCTXSems Machine ScrewSteelZinc/Clear#8-32 x 1/28-32x1/2 phil pan int sem screw zinc b18.13392
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QFCTXSems Machine ScrewSteelPlain#10-32 x 1/2#10-32x1/2 slotted hex washer b18.1326550
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General FMISems Machine ScrewSteelZinc/Clear#6-32 x 1/26-32 x .50 pn phil ms sems int lw zn b18.1310311
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General FMISems Machine ScrewSteelZinc/Yellow#6-32 x 1/26-32 x.50 pn phil sems int lw zn ylw b18.137998
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OSSCORISems Machine ScrewSteelZinc/Clear#6-32 x 1/26-32x1/2 phil pan m/s square conical sems plated b18.135,000
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QFCTXSems Machine ScrewSteelZinc/Clear#10-32 x 1/210-32 x 1/2 phil pan ext sem screw zinc b18.13500
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QFCTXSems Machine ScrewSteelZinc/Black10-10 x 1/210-10x1/2 phil wshr sq drive black zinc b18.134900
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QFCTXSems Machine ScrewSteelPlain1/4-20 x 1/21/4-20 x 1/2 phil pan ext sem screw b18.13999
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QFCTXSems Machine ScrewSteelPlain1/4-20 x 1/21/4-20 x 1/2 ind hex external sem screw b18.131816
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QFCTXSems Machine ScrewSteelPlain#4-40 x 1/24-40 x 1/2 phil pan ext sem screw b18.13500
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QFCTXSems Machine ScrewSteelZinc/Yellow#4-40 x 1/24-40x1/2 pan phil square cone sems zy b18.132500
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QFCTXSems Machine ScrewSteelZinc/Clear#4-40 x 1/24-40 x 1/2 pan torx sq cone sems zinc b18.1375502
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QFCTXSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 1/26-32 x 1/2 phil pan sq cone sems 18-8 b18.132400
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QFCTXSems Machine ScrewSteelZinc/Clear#6-32 x 1/26-32x1/2 phil pan ext sem screw zinc b18.13231
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QFCTXSems Machine ScrewSteelZinc/Clear#8-32 x 1/28-32 x 1/2 phil pan ext sems screw zinc b18.132500
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Mid-ValleyCASems Machine ScrewSteelPlain#10-32 x 1/2sems tapping screw b18.13inquire
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#6-32 x 1/2sems m/s s cone hex slind 632x1/2 steel zinc plated b18.1321000
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#10-32 x 1/2sem ext pan phillips 1032x1/2 steel zinc plated b18.131952
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JET FITTINGCASems Machine ScrewSteelZinc/Black#10-32 x 1/2sem ext pan phillips 1032x1/2 steel zinc black b18.1380
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#6-32 x 1/2sem ext pan phillips 632x1/2 stainless steel b18.13565
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#8 x 1/2dws round washer phillips #8x1/2 steel zinc plated b18.132675
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Black Oxide#4-40 x 1/24-40x1/2 phillips pan internal star lock washer sems screw stainless steel 18-8 black oxide b18.131000
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1/2sem int pan phillips 1032x1/2 stainless steel b18.13375
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 1/2sem ext pan phillips 1032x1/2 stainless steel b18.13200
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#10-32 x 1/2sem s cone pan phillips 1032x1/2 steel zinc rohs compliant b18.133000
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JET FITTINGCASems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#4-40 x 1/2sem s cone pan phillips 440x1/2 stainless steel b18.13300
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JET FITTINGCASems Machine ScrewSteelPlain#6-32 x 1/2sem int pan phillips 632x1/2 cpy b18.1372800
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#6-32 x 1/2sem int pan phillips 632x1/2 steel zinc plated b18.135800
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JET FITTINGCASems Machine ScrewSteelBlack Oxide#6-32 x 1/2sem external pan phillips 632x1/2 steel black oxide and wax b18.135000
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JET FITTINGCASems Machine ScrewSteelZinc/Clear#6-32 x 1/2sem s cone pan phillips 632x1/2 steel zinc plated b18.132000
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KBSTNSems Machine ScrewSteelZinc/Clear1/4-20 x 1/21/4-20 x 1/2 sems external pan phil m/s pltd b18.136,948
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WSBKYSems Machine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#8-32 x 1/2screw ms pn semi (18-8) ph 8-32x1/2 b18.136,238
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WSBKYSems Machine ScrewSteelPlaine/screw hwh sems (302) 8-16x1/2 b18.1350,264
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