Click Specification

Low Head Hexagon Socket Cap Screws [Table 12] (ASTM F835)

ASME B 18.3 (T12) - 2012

Display drawing:

Nominal Diameter
d

10#

1/4

5/16

3/8

7/16

1/2

5/8

d	Thread Diameter
PP	UNC
	UNF
	UNEF
d_s	max
d_s	min
d_k	max
d_k	min
k	max
k	min
s	Nominal Size
t	min
b	min
c	max
d_a	max
d_a	max
r	max

0.112	0.125	0.138	0.164	0.19	0.25	0.3125	0.375	0.4375	0.5	0.625
40	40	32	32	24	20	18	16	14	13	11
48	44	40	36	32	28	24	24	20	20	18
-	-	-	-	-	32	32	32	28	28	24
0.112	0.125	0.138	0.164	0.19	0.25	0.3125	0.375	0.4375	0.5	0.625
0.1075	0.1202	0.1329	0.1585	0.184	0.2435	0.3053	0.3678	0.4294	0.4919	0.6163
0.183	0.205	0.226	0.27	0.312	0.375	0.437	0.562	0.625	0.75	0.875
0.176	0.198	0.218	0.262	0.303	0.365	0.431	0.55	0.618	0.743	0.867
0.059	0.065	0.072	0.085	0.098	0.127	0.158	0.192	0.223	0.254	0.316
0.053	0.059	0.066	0.079	0.092	0.121	0.152	0.182	0.213	0.244	0.306
0.05	0.062	0.062	0.078	0.094	0.125	0.156	0.188	0.219	0.25	0.312
0.038	0.044	0.05	0.06	0.072	0.094	0.11	0.115	0.135	0.151	0.25
0.75	0.75	0.75	0.88	0.88	1	1.12	1.25	1.38	1.5	1.75
0.009	0.012	0.013	0.014	0.018	0.025	0.033	0.040	0.047	0.055	0.070
0.130	0.145	0.158	0.188	0.218	0.278	0.347	0.415	0.484	0.552	0.689
0.117	0.132	0.144	0.172	0.202	0.261	0.329	0.397	0.465	0.531	0.664
0.008	0.008	0.008	0.008	0.008	0.010	0.010	0.010	0.015	0.015	0.015

①,This product, although a high-strength precision fastener, is recommended for lighter fastening applications. It is not suggested for use in critical high-strength applications where socket head cap screws should normally be used. They are designed to be used in applications where head height clearance is a problem. Because of their reduced head height and smaller socket size, they normally cannot be properly preloaded as a standard socket cap screw and should not be subjected to high dynamic loads.
②,1. Since these are not full-size socket screw products, the mechanical requirements of ASTM A574 will not apply. 2. The minimum tensile requirements for Alloy Steel Low Head Socket Cap Screws are the same as for Alloy Steel Socket Button Cap Screws, for the same length and diameter, as per ASTM F835.
③,For more requirements, please refer to the original standard document.

Alternative history

ASME B 18.3 - 2003(R2008) ASME B 18.3 - 2012

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