This product is regulated by the following standards:

ASME B18.3 TABLE 1G ASME B18.3 TABLE 3 ASME B18.3 TABLE 1A ASME B18.3 TABLE 2A

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Socket head cap screws, inch series

This product is regulated by the following standards:

Standard ASME B18.3 TABLE 1G

Hexagon socket head cap screws with low head. This...Information restricted to registered users: Login | Register now for a 14 day free trial


Dimensions in inches - source ASME B18.3 table 1G - 2008- Low head Hex Socket Cap Screws
d basic thread size		Nr of threads x inch		A max	H min	D min	T min	J hex socket
inches	mm	UNC	UNF	A max	H min	D min	T min	J hex socket
4 (0.1129
5 (0.125)
6 (0.138)
8 (0.164)
10 (0.19)
1/4
5/16
3/8
7/16
1/2
5/8

Standard ASME B18.3 TABLE 3

Hex and spline socket button head cap screwsInformation restricted to registered users: Login | Register now for a 14 day free trial


Dimensions in inches - source ASME B18.3 table 3 - 2008 hex and spline socket button head cap screws
d basic thread size		Nr of threads x inch		A max	H min	L max standard	T min	J hex socket	M spline socket
inches	mm	UNC	UNF	A max	H min	L max standard	T min	J hex socket	M spline socket
0 (0.06)
1 (0.073)
2 (0.086)
3 (0.099)
4 (0.1129
5 (0.125)
6 (0.138)
8 (0.164)
10 (0.19)
1/4
5/16
3/8
1/2
5/8

Standard ASME B18.3 TABLE 1A

Hexagon socket head cap screws. The socket head sh...Information restricted to registered users: Login | Register now for a 14 day free trial


Dimensions in inches - source ASME B18.3 table 1A Publication date: 2003
d basic thread size		Nr of threads x inch		dk max	k max	t min	b min	S nom	M nom
inches	mm	UNC	UNF	dk max	k max	t min	b min	S nom	M nom
0	1.52	-	80	0.096	0.060	0.025	0.5	0.05	0.06
N° 1	1.85	64	72	0.118	0.073	0.031	0.62	0.062	0.072
N° 2	2.18	56	64	0.140	0.086	0.038	0.62	0.078	0.096
N° 3
N° 4
N° 5
N° 6
N° 8
N° 10
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1 1/8
1 1/4
1 3/8
1 1/2
1 3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
3-3/4
4

Approx. mass, in kg x1000 pcs, (ρ=7,85 kg/dm³) -
d thread size	4-40	6-32	8-32	10-24	10-32	1/4	5/16	3/8	7/16	1/2	5/8	3/4
nominal length l
1/4	0,53	0,93	1,49	2,19	2,25
5/16	0,58	1,01	1,61	2,36	2,43	4,37
3/8	0,64	1,10	1,74	2,51	2,60	4,65	8,41
7/16	0,70	1,19	1,87	2,68	2,78	4,95	8,88
1/2
5/8
3/4
7/8
1
1-1/4
1-1/2
1-3/4
2
2-1/4
2-1/2
2-3/4
3
3-1/4
3-1/2
3-3/4
4
4-1/4
4-1/2
4-3/4
5
5-1/4
5-1/2
5-3/4
6
6-1/4
6-1/2
6-3/4
7

Standard ASME B18.3 TABLE 2A

Socket Flat Countersunk Head Cap Screws. The flat ...Information restricted to registered users: Login | Register now for a 14 day free trial


Dimensions in inches - ASME b18.3Table 2A - 2008- Socket Flat Countersunk Head Cap Screws
d thread size		Nr. of threads x inch		d1 min	b basic thread length	dk max theo.Sharp	k max	t min	S nom	M nom
inches	mm	UNC	UNF	d1 min	b basic thread length	dk max theo.Sharp	k max	t min	S nom	M nom
0 (0.06)	1.52	-	80	0.568	0.5	0.138	0.044	0.025	0.035	0.048
1 (0.073)
2 (0.086)
3 0.099)
4 (0.112)
5 (0.125)
6 (0.138)
8 (0.164)
10 (0.19)
1/4
5/16
3/8
7/16
1/2
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2

Socket head cap screws, inch series

Dimensions in inches - source ASME B18.3 table 1A - 2008- Socket head cap screws
d basic thread size		Nr of threads x inch		dk max	k max	b min	S nom	M nom
inches	mm	UNC	UNF	dk max	k max	b min	S nom	M nom
0	1.52	-	80	0.096	0.060	0.5	0.05	0.06
N° 1	1.85	64	72	0.118	0.073	0.62	0.062	0.072
N° 2	2.18	56	64	0.140	0.086	0.62	0.078	0.096
N° 3	2.51	48	56	0.161	0.099	0.62	0.078	0.096
N° 4	2.84	40	48	0.183	0.112	0.75	0.094	0.111
N° 5	3.18	40	44	0.205	0.125	0.75	0.094	0.111
N° 6	3.51	32	40	0.226	0.138	0.75	0.109	0.133
N° 8	4.17	32	36	0.270	0.164	0.88	0.141	0.168
N° 10	4.83	24	32	0.312	0.190	0.88	0.156	0.183
1/4	6.35	20	28	0.375	0.250	1	0.188	0.216
5/16	7.94	18	24	0.469	0.312	1.12	0.25	0.291
3/8	9.53	16	24	0.562	0.375	1.25	0.312	0.372
7/16	11.11	14	20	0.656	0.438	1.38	0.375	0.454
1/2	12.70	13	20	0.750	0.5	1.5	0.375	0.454
5/8	15.88	11	18	0.938	0.625	1.75	0.5	0.595
3/4	19.05	10	16	1.125	0.750	2	0.625	0.620
7/8	22.23	9	14	1.312	0.875	2.25	0.75	0.698
1	25.40	8	12	1.5	1	2.5	0.75	0.790
1 1/8	28.58	7	12	1.687	1.125	2.81	0.875	-
1 1/4	31.75	7	12	1.875	1.250	3.12	0.875	-
1 3/8	34.93	6	12	2.062	1.375	3.44	1	-
1 1/2	38.10	6	12	2.25	1.5	3.75	1	-
1 3/4	28.58	5	-	2.625	1.75	4.38	1.25	-
2	34.93	4.5	-	3	2	5	1.5	-
2-1/4	38.10	4.5	-	3.375	2.25	5.62	1.75	-
2-1/2	63.50	4	-	3.75	2.5	6.25	1.75	-
2-3/4	69.85	4	-	4.125	2.75	6.88	2	-
3	76.20	4	-	4.5	3	7.5	2.25	-
3-1/4	82.55	4	-	4.875	3.25	8.12	2.25	-
3-1/2	88.90	4	-	5.25	3.5	8.75	2.75	-
3-3/4	95.25	4	-	5.625	3.75	9.38	2.75	-
4	101.6	4	-	6	4	10	3	-


Dimensions in inches - source ASME B18.3 table 1G - 2008- Low head Hex Socket Cap Screws
d basic thread size		Nr of threads x inch		A max	H min	D min	T min	J hex socket
inches	mm	UNC	UNF	A max	H min	D min	T min	J hex socket
4 (0.1129	2.84	40	48	0.183	0.053	0.107	0.038	0.05
5 (0.125)	3.18	40	44	0.205	0.059	0.12	0.044	0.062
6 (0.138)	3.51	32	40	0.226	0.066	0.132	0.05	0.062
8 (0.164)	4.17	32	36	0.27	0.079	0.159	0.06	0.078
10 (0.19)	4.83	24	32	0.312	0.092	0.184	0.072	0.094
1/4	6.35	20	28	0.375	0.121	0.244	0.094	0.125
5/16	7.94	18	24	0.437	0.152	0.305	0.110	0.156
3/8	9.53	16	24	0.562	0.182	0.368	0.115	0.188
7/16	11.11	14	20	0.625	0.213	0.429	0.135	0.219
1/2	12.70	13	20	0.75	0.244	0.492	0.151	0.25
5/8	15.88	11	18	0.875	0.306	0.616	0.25	0.312


Dimensions in inches - ASME b18.3Table 2A - 2008-Socket Flat Countersunk Head Cap Screws
d thread size		Nr. of threads x inch		d1 min	b basic thread length	dk max theo.Sharp	k max	t min	S nom	M nom
inches	mm	UNC	UNF	d1 min	b basic thread length	dk max theo.Sharp	k max	t min	S nom	M nom
0 (0.06)	1.52	-	80	0.568	0.5	0.138	0.044	0.025	0.035	0.048
1 (0.073)	1.85	64	72	0.07	0.62	0.168	0.054	0.031	0.05	0.06
2 (0.086)	2.18	56	64	0.082	0.62	0.197	0.064	0.038	0.05	0.06
3 0.099)	2.51	48	56	0.095	0.62	0.226	0.073	0.044	0.062	0.072
4 (0.112)	2.84	40	48	0.108	0.75	0.255	0.083	0.055	0.062	0.072
5 (0.125)	3.18	40	44	0.12	0.75	0.281	0.90	0.061	0.078	0.096
6 (0.138)	3.51	32	40	0.133	0.75	0.307	0.097	0.066	0.078	0.096
8 (0.164)	4.17	32	36	0.159	0.875	0.359	0.112	0.076	0.094	0.111
10 (0.19)	4.83	24	32	0.184	0.875	0.411	0.127	0.087	0.125	0.145
1/4	6.35	20	28	0.244	1	0.531	0.161	0.111	0.156	0.183
5/16	7.94	18	24	0.305	1.125	0.656	0.198	0.135	0.188	0.216
3/8	9.53	16	24	0.368	1.25	0.781	0.234	0.159	0.219	0.251
7/16	11.11	14	20	0.429	1.375	0.844	0.234	0.159	0.25	0.291
1/2	12.70	13	20	0.492	1.5	0.938	0.251	0.172	0.312	0.372
5/8	15.88	11	18	0.616	1.75	1.188	0.324	0.220	0.375	0.454
3/4	19.05	10	16	0.741	2	1.438	0.396	0.220	0.5	0.454
7/8	22.23	9	14	0.865	2.25	1.688	0.468	0.248	0.562	-
1	25.40	8	12	0.989	2.5	1.938	0.540	0.297	0.625	-
1-1/8	28.58	7	12	1.108	2.81	2.188	0.611	0.325	0.75	-
1-1/4	31.75	7	12	1.233	3.12	2.438	0.683	0.358	0.875	-
1-3/8	34.93	6	12	1.357	3.44	2.688	0.755	0.402	0.875	-
1-1/2	38.10	6	12	1.482	3.75	2.938	0.827	0.435	1	-


Dimensions in inches - source ASME B18.3 table 3 - 2008 hex and spline socket button head cap screws
d basic thread size		Nr of threads x inch		A max	H min	L max standard	T min	J hex socket	M spline socket
inches	mm	UNC	UNF	A max	H min	L max standard	T min	J hex socket	M spline socket
0 (0.06)	1.52	-	80	0.114	0.026	0.5	0.02	0.035	0.048
1 (0.073)	1.85	64	72	0.139	0.033	0.5	0.028	0.05	0.06
2 (0.086)	2.18	56	64	0.164	0.046	0.5	0.028	0.05	0.06
3 (0.099)	2.51	48	56	0.188	0.052	0.5	0.035	0.062	0.072
4 (0.1129	2.84	40	48	0.213	0.059	0.5	0.035	0.062	0.072
5 (0.125)	3.18	40	44	0.238	0.066	0.5	0.044	0.078	0.096
6 (0.138)	3.51	32	40	0.262	0.073	0.63	0.044	0.078	0.096
8 (0.164)	4.17	32	36	0.312	0.087	0.750	0.052	0.094	0.111
10 (0.19)	4.83	24	32	0.361	0.101	1	0.07	0.125	0.145
1/4	6.35	20	28	0.437	0.132	1	0.087	0.156	0.183
5/16	7.94	18	24	0.547	0.166	1	0.105	0.188	0.216
3/8	9.53	16	24	0.656	0.199	1	0.122	0.219	0.251
1/2	12.70	13	20	0.875	0.265	2	0.175	0.312	0.372
5/8	15.88	11	18	1	0.331	2	0.21	0.375	0.454

Full list of Suppliers of Socket head cap screws, inch series

Italy

Buora d.p.u. S.r.l.

Founded in 1969, Buora D.P.U. is a distributor certified following ISO 9001.

The company offers the complete range of high strength fasteners, ready on stock, both coarse and fine pitches with metric and inch threads.

Distributor of prestigious brands such as UNBRAKO and NORD-LOCK, for Buora D.P.U. the service always comes first, therefore there is not minimum quantity required.

Netherlands

Triofast BV

Distributor of standard and special fasteners.

The company supplies fasteners with various types of thread: UNC, UNF, BSW and BSF. The products meet standards such as ISO, DIN, ASTM, ANSI and BS.

Thailand

Bangkok Fastening Co. Ltd.

Manufacturer of hex head screws, carriage bolts and socket cap screws

Italy

BULLONERIA BELLICINI srl

Manufacturer of hot forged fasteners and nip bolts, from M20 to M64

Clyde Fasteners Limited

Manufacturer of socket screws and Tee Slot Bolts both metric and imperial

Earnest Machine

Distributor of fasteners

Italy

FASTENAL EUROPE SRL

We offer logistics and inventory management and integrated supply chain management services covering a wide market of OEM fasteners (KanBan), MRO and Personal Protective Equipment (Vending Machine).

Taiwan

FkE FWU Kuang Enterprises LTD

One of the main producers of socket cap screws in haig tensile steels: 10.9 12.9 14.99

Germany

Fürniss GmbH

Distributor of aerospace fasteners

USA

Holo-Krome Company

Manufacturer of hex-socket screw in inch

Taiwan

JINN HER ENTERPRISE CO. LTD

Manufacturer of standard and special fasteners, from M4 to M30, from 1/4' to 1-1/4'. Lengths from 10 to 300mm and from 1/2' to 12'.

K-Engineering Co Ltd

Manufacturer of threaded items, mainly screwed rods, engineering studs, bright bolts and sets and special items according to customer specifications

USA

Kerr Lakeside Inc.

Manufacturer of socket cap screws both in metric and inch dimensions

Taiwan

Lih Ta Fasteners

Manufacturer of six-lobe screws, micro screws, screws for plastics and trilobular screws. Torx licensed, and other pantent drives and threads

India

MARUTI INTERNATIONAL

Manufacturer of screws, nuts, washers and threaded rods

Germany

Peter Schröder GmbH

Distributor specialized in inch thread fasteners

Germany

Pfitzer Verbindungstechnik Gmbh

Distributor of inch sized fasteners, oil and gas fasteners and turned special screws

Germany

ScrewCorner Fastener - Superstore

Distributor of inch fasteners as per British and American standards

China

SHANGHAI PRIME MACHINERY CO.LTD

One of the largest fasteners manufacturer and exporter in China.

Hexagon and socket screws, high strength hex bolts (ASTM GR5 and GR8, DIN and ISO CL.8.8 and 10.9)

The surface plating includes Black, Zinc Bright, Zinc Yellow, Hot Dip Galvanize, Dacromet, Geomet and others.

Taiwan

YFS - Fang Sheng Screw CO. LTD.

One of the world''s largest manufactures of Alloy Steel Hexagon Socket Screws: Hex Socket Cap, Flat Head Sockets, Shoulder Screws, Button Head Sockets, Hex. Heads, Socket SET Screws.

The portal for fasteners and fixing elements

Suppliers of Socket head cap screws, inch series

Technical data

Standard ASME B18.3 TABLE 1G

Standard ASME B18.3 TABLE 3

Standard ASME B18.3 TABLE 1A

Standard ASME B18.3 TABLE 2A

Details

Buora d.p.u. S.r.l.

Triofast BV

Bangkok Fastening Co. Ltd.

BULLONERIA BELLICINI srl

Clyde Fasteners Limited

Earnest Machine

FASTENAL EUROPE SRL

FkE FWU Kuang Enterprises LTD

Fürniss GmbH

Holo-Krome Company

JINN HER ENTERPRISE CO. LTD

K-Engineering Co Ltd

Kerr Lakeside Inc.

Lih Ta Fasteners

MARUTI INTERNATIONAL

Peter Schröder GmbH

Pfitzer Verbindungstechnik Gmbh

ScrewCorner Fastener - Superstore

SHANGHAI PRIME MACHINERY CO.LTD

Smith Bullough

Socket & Allied Screws Ltd

Socketfast Ltd Boltfast Ltd

The Dyson Corporation

The socket source Inc.

TUZ Maudle Cor.

Tycoons Worldwide Group

UNBRAKO - Deepak Fasteners Ltd.

Uniloc Fasteners

YFS - Fang Sheng Screw CO. LTD.