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Hexagon Socket Flat Countersunk Head Cap Screws [Table 8] (ASTM F835 F879)

Achieve precise and flush fastening with Hexagon Socket Flat Countersunk Head Cap Screws compliant with ASME B 18.3 - 2012 standards. Crafted from high-quality materials, these screws ensure durable and reliable performance in various industries.

Model:ASME B 18.3

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Product Description

Precision Engineering: ASME B 18.3 - 2012 compliant Hexagon Socket Flat Countersunk Head Cap Screws are engineered with precision, ensuring accurate and reliable fastening in a variety of applications.

Flush Installation: Featuring a flat countersunk head design, these screws provide a flush installation, reducing the risk of snagging and enhancing the aesthetic appeal of assemblies.

High-Quality Material: Crafted from high-quality materials, such as ASTM F835 and F879, these screws offer durability and corrosion resistance, suitable for demanding environments.

Versatile Use: With their versatile design and reliable performance, these screws find application in industries ranging from construction and automotive to electronics and machinery.

Nominal Diameter
d

10#

12#

1/4

5/16

d	Nominal Diameter
PP	UNC
	UNF
	UNEF
d_s	max
d_s	min
d_k	max
d_k	min
k	Ref
s	Nominal Size
s	Nominal Size
t	min
b	min
α	±2°

0.06	0.073	0.086	0.099	0.112	0.125	0.138	0.164	0.19	0.2158	0.25	0.3125
-	64	56	48	40	40	32	32	24	24	20	18
80	72	64	56	48	44	40	36	32	28	28	24
-	-	-	-	-	-	-	-	-	32	32	32
0.06	0.073	0.086	0.099	0.112	0.125	0.138	0.164	0.19	0.2158	0.25	0.3125
0.0568	0.0695	0.0822	0.0949	0.1075	0.1202	0.1329	0.1585	0.184	0.2102	0.2435	0.3053
0.138	0.168	0.197	0.226	0.255	0.281	0.307	0.359	0.411	0.45	0.531	0.656
0.117	0.143	0.168	0.193	0.218	0.24	0.263	0.311	0.359	0.41	0.48	0.6
0.044	0.054	0.064	0.073	0.083	0.09	0.097	0.112	0.127	0.135	0.161	0.198
-	-	-	1/16	1/16	5/64	5/64	3/32	1/8	1/8	5/32	3/16
0.035	0.05	0.05	0.062	0.062	0.078	0.078	0.094	0.125	0.125	0.156	0.188
0.025	0.031	0.038	0.044	0.055	0.061	0.066	0.076	0.087	0.094	0.111	0.135
0.5	0.62	0.62	0.62	0.75	0.75	0.75	0.88	0.88	0.88	1	1.12
82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°

Nominal Diameter
d

3/8

7/16

1/2

5/8

3/4

7/8

1-1/8

1-1/4

1-3/8

1-1/2

d	Nominal Diameter
PP	UNC
	UNF
	UNEF
d_s	max
d_s	min
d_k	max
d_k	min
k	Ref
s	Nominal Size
s	Nominal Size
t	min
b	min
α	±2°

0.375	0.4375	0.5	0.625	0.75	0.875	1	1.125	1.25	1.375	1.5
16	14	13	11	10	9	8	7	7	6	6
24	20	20	18	16	14	12	12	12	12	12
32	28	28	24	20	20	20	18	18	18	18
0.375	0.4375	0.5	0.625	0.75	0.875	1	1.125	1.25	1.375	1.5
0.3678	0.4294	0.4919	0.6163	0.7406	0.8647	0.9886	1.1086	1.2336	1.3568	1.4818
0.781	0.844	0.938	1.188	1.438	1.688	1.938	2.188	2.438	2.688	2.938
0.72	0.781	0.872	1.112	1.355	1.604	1.841	2.079	2.316	2.553	2.791
0.234	0.234	0.251	0.324	0.396	0.468	0.54	0.611	0.683	0.755	0.827
7/32	1/4	5/16	3/8	1/2	9/16	5/8	3/4	7/8	7/8	1
0.219	0.25	0.312	0.375	0.5	0.562	0.625	0.75	0.875	0.875	1
0.159	0.159	0.172	0.22	0.22	0.248	0.297	0.325	0.358	0.402	0.435
1.25	1.38	1.5	1.75	2	2.25	2.5	2.81	3.12	3.44	3.75
82°	82°	82°	82°	82°	82°	82°	82°	82°	82°	82°

①,Material
a、Alloy steel shall conform in all respects to ASTM F835
b、Corrosion-resistant steel shall conform in all respects to ASTM F879

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