Socket Head Cap Screws

Please select your shipping country to view the most accurate inventory information, and to determine the correct Edmund Optics sales office for your order.

Select Your Country/Region:

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
	#03-662	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

Technical Information