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Socket Head Cap Screws


Technical Information

Allen Wrench Size Chart
  Allen Wrench Stock No. Allen Wrench Hex Key Size For Socket Head Cap For Socket Head Set For Button Head Cap
English #58-639 0.028" N/A #0 N/A
#58-638 0.035" N/A #2 #0
#56-271 0.050" #0 #4 #2
#58-637 1/16" #1 #6 #3 & #4
#56-270 1/64" #2 & #3 #8 #5 & #6
#55-188 3/32" #4 & #5 #10 #8
#55-189 7/64" #6 N/A N/A
#03-622 1/8" N/A ¼" #10
#55-190 9/64" #8 N/A N/A
#55-191 5/32" #10 & #12 5/16" #12 & ¼"
#55-192 3/16" ¼" 3/8" 5/16"
Metric #58-636 0.9mm N/A M2 N/A
#55-452 1.5mm M1.6 & M2 M3 M2.5
#57-445 2mm M2.5 & M2.6 M4 M3
#55-451 2.5mm M3 M5 M4
#55-199 3mm M4 M6 M5
#55-200 5mm M6 M10 M8

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