China ASME B18.3 Hex Socket Cap Head Screw ASTM A574 F837 manufacturers and suppliers

ASME B18.3 Hex Socket Cap Head Screw ASTM A574 F837

Short Description:

Standard: ASME B18.3, ASTM A574 F837

Product Name: Hex Socket Cap Head Screw

Key Words: ASME B18.3, Cup head screw, Carbon steel

Size: 1/4″-1″

Material: 10B21, 40Cr, 35CrMo

Stength Grade: ASTM A574 F837

Surface Treatment: Black

Thread Length: Full Thread/ Half Thread

Thread Type: Coarse/Fine

Packing: Bag/Carton/Wooden case

Other Features: Offer customized head mark

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Size			0#	1#	2#	3#	4#	5#	6#	8#	10#	12#	1/4	5/16
d	Thread Dia		0.06	0.073	0.086	0.099	0.112	0.125	0.138	0.164	0.19	0.216	0.25	0.3125
PP	UNC		-	64	56	48	40	40	32	32	24	24	20	18
	UNF		80	72	64	56	48	44	40	36	32	28	28	24
	UNEF		-	-	-	-	-	-	-	-	-	32	32	32
ds	Max=Nominal		0.06	0.073	0.086	0.099	0.112	0.125	0.138	0.164	0.19	0.216	0.25	0.3125
ds	Min		0.0568	0.0695	0.0822	0.0949	0.1075	0.1202	0.1329	0.1585	0.184	0.2095	0.2435	0.3053
dk ①	Max		0.096	0.118	0.14	0.161	0.183	0.205	0.226	0.27	0.312	0.324	0.375	0.469
dk ①	Min		0.091	0.112	0.134	0.154	0.176	0.198	0.216	0.257	0.298	0.314	0.354	0.446
k	Max		0.06	0.073	0.086	0.099	0.112	0.125	0.138	0.164	0.19	0.216	0.25	0.312
k	Min		0.057	0.07	0.083	0.095	0.108	0.121	0.134	0.159	0.185	0.21	0.244	0.306
s	Nominal		0.05	0.062	0.078	0.078	0.094	0.094	0.109	0.141	0.156	0.156	0.188	0.25
t	Min		0.025	0.031	0.038	0.044	0.051	0.057	0.064	0.077	0.09	0.103	0.12	0.151
b	Min		0.5	0.62	0.62	0.62	0.75	0.75	0.75	0.88	0.88	0.88	1	1.12
c	Chamfer	Max	0.004	0.005	0.008	0.008	0.009	0.012	0.013	0.014	0.018	0.022	0.025	0.033
r	Chamfer	Max	0.007	0.007	0.007	0.007	0.008	0.008	0.008	0.008	0.008	0.01	0.01	0.01
w	Min		0.02	0.025	0.029	0.034	0.038	0.043	0.047	0.056	0.065	0.082	0.095	0.119

Size			3/8	7/16	1/2	9/16	5/8	3/4	7/8	1	1-1/8	1-1/4	1-3/8	1-1/2
d	Thread Dia		0.375	0.4375	0.5	0.5625	0.625	0.75	0.875	1	1.125	1.25	1.375	1.5
PP	UNC		16	14	13	12	11	10	9	8	7	7	6	6
	UNF		24	20	20	18	18	16	14	12	12	12	12	12
	UNEF		32	28	28	24	24	20	20	20	18	18	18	18
ds	Max=Nominal		0.375	0.4375	0.5	0.5625	0.625	0.75	0.875	1	1.125	1.25	1.375	1.5
ds	Min		0.3678	0.4294	0.4919	0.5538	0.6163	0.7406	0.8647	0.9886	1.1086	1.2336	1.3568	1.4818
dk ①	Max		0.562	0.656	0.75	0.843	0.938	1.125	1.312	1.5	1.688	1.875	2.062	2.25
dk ①	Min		0.54	0.631	0.725	0.827	0.914	1.094	1.291	1.476	1.665	1.852	2.038	2.224
k	Max		0.375	0.438	0.5	0.562	0.625	0.75	0.875	1	1.125	1.25	1.375	1.5
k	Min		0.368	0.43	0.492	0.554	0.616	0.74	0.864	0.988	1.111	1.236	1.36	1.485
s	Nominal		0.312	0.375	0.375	0.437	0.5	0.625	0.75	0.75	0.875	0.875	1	1
t	Min		0.182	0.213	0.245	0.276	0.307	0.37	0.432	0.495	0.557	0.62	0.682	0.745
b	Min		1.25	1.38	1.5	1.5	1.75	2	2.25	2.5	2.81	3.12	3.44	3.75
c	Chamfer	Max	0.04	0.047	0.055	0.062	0.07	0.085	0.1	0.114	0.129	0.144	0.16	0.176
r	Chamfer	Max	0.01	0.015	0.015	0.015	0.015	0.015	0.02	0.02	0.02	0.02	0.02	0.02
w	Min		0.143	0.166	0.19	0.214	0.238	0.285	0.333	0.38	0.428	0.475	0.523	0.57

Size			1-3/4	2	2-1/4	2-1/2	2-3/4	3	3-1/4	3-1/2	3-3/4	4
d	Thread Dia		1.75	2	2.25	2.5	2.75	3	3.25	3.5	3.75	4
PP	UNC		5	4.5	4.5	4	4	4	4	4	4	4
	UNF		-	-	-	-	-	-	-	-	-	-
	UNEF		-	-	-	-	-	-	-	-	-	-
ds	Max=Nominal		1.75	2	2.25	2.5	2.75	3	3.25	3.5	3.75	4
ds	Min		1.7295	1.978	2.228	2.4762	2.7262	2.9762	3.2262	3.4762	3.7262	3.9762
dk ①	Max		2.625	3	3.375	3.75	4.125	4.5	4.875	5.25	5.625	6
dk ①	Min		2.597	2.97	3.344	3.717	4.09	4.464	4.837	5.211	5.584	5.958
k	Max		1.75	2	2.25	2.5	2.75	3	3.25	3.5	3.75	4
k	Min		1.734	1.983	2.232	2.481	2.73	2.979	3.228	3.478	3.727	3.976
s	Nominal		1.25	1.5	1.75	1.75	2	2.25	2.25	2.75	2.75	3
t	Min		0.87	0.995	1.12	1.245	1.37	1.495	1.62	1.745	1.87	1.995
b	Min		4.38	5	5.62	6.25	6.88	7.5	8.12	8.75	9.38	10
c	Chamfer	Max	0.207	0.238	0.269	0.3	0.332	0.363	0.394	0.426	0.458	0.489
r	Chamfer	Max	0.02	0.02	0.036	0.036	0.036	0.036	0.036	0.036	0.036	0.036
w	Min		0.665	0.76	0.855	0.95	1.045	1.14	1.235	1.33	1.425	1.52

Detail description

According to the hardness of screw wire, carrying tension, yield strength and so on, there is a grade classification of Hexagon socket bolt, that is, the level of hexagon socket bolt. Different products and materials are required to have different grades of hex socket bolts corresponding to them. Hex socket bolts all have the following grades:

Hexagon socket bolts are divided into ordinary and high strength bolts according to grade strength. Ordinary hex socket bolts refer to class 4.8, high strength hex socket bolts refer to class 8.8 or above, including class 10.9 and class 12.9. Hex socket bolts of grade 12.9 are generally black HEX socket cup head screws with knurling, natural color and oil.

The performance grade of hex socket bolts for steel structure connection is 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, etc. There are more than 10 grades, among which the bolts of grade 8.8 and above are made of low carbon alloy steel or medium carbon steel and heat-treated (quenched, tempered), which are generally called high strength bolts, and the others are generally called ordinary bolts. The bolt performance grade label is composed of two parts, which respectively represent the nominal tensile strength value and the buckling ratio of the bolt material.