Click Specification

Square Head Bolts

ASME B 18.2.1 - 2010

Display drawing:

Download CAD Model^*

^*Models with different eras.

Screw Thread
d

1/4

5/16

3/8

7/16

1/2

5/8

3/4

7/8

1-1/8

1-1/4

1-3/8

1-1/2

PP	UNC
d_s	max
d_s	min
s	Basic
	max
	min
e	max
e	min
k	Basic
	max
	min
r	max
r	min
b	L≤6
b	L＞6

20	18	16	14	13	11	10	9	8	7	7	6	6
0.260	0.324	0.388	0.452	0.515	0.642	0.768	0.895	1.022	1.149	1.277	1.404	1.531
0.237	0.298	0.36	0.421	0.482	0.605	0.729	0.852	0.976	1.098	1.223	1.345	1.47
3/8	1/2	9/16	5/8	3/4	15/16	1-1/8	1-5/16	1-1/2	1-11/16	1-7/8	2-1/16	2-1/4
0.375	0.500	0.562	0.625	0.750	0.938	1.125	1.312	1.500	1.688	1.875	2.062	2.250
0.362	0.484	0.544	0.603	0.725	0.906	1.088	1.269	1.450	1.631	1.812	1.944	2.175
0.53	0.707	0.795	0.884	1.061	1.326	1.591	1.856	2.121	2.386	2.652	2.917	3.182
0.498	0.665	0.747	0.828	0.995	1.244	1.494	1.742	1.991	2.239	2.489	2.738	2.986
11/64	13/64	1/4	19/64	21/64	27/64	1/2	19/32	21/32	3/4	27/32	29/32	1
0.188	0.220	0.268	0.316	0.348	0.444	0.524	0.620	0.684	0.780	0.876	0.940	1.036
0.156	0.186	0.232	0.278	0.308	0.400	0.476	0.568	0.628	0.720	0.812	0.872	0.964
0.03	0.03	0.03	0.03	0.03	0.06	0.06	0.06	0.09	0.09	0.09	0.09	0.09
0.01	0.01	0.01	0.01	0.01	0.02	0.02	0.02	0.03	0.03	0.03	0.03	0.03
0.750	0.875	1.000	1.125	1.250	1.500	1.750	2.000	2.250	2.500	2.750	3.000	3.250
1.000	1.125	1.250	1.375	1.500	1.750	2.000	2.250	2.500	2.750	3.000	3.250	3.500

Alternative history

ANSI/ASME B 18.2.1 - 1996 ASME B 18.2.1 - 2010 ASME B 18.2.1 - 2012

Suppliers

Best price if from GlobalFastener.com.

NingBo ZhenHai Guisi Zhaoyang Hardware Screw Factory

Mr.Fang
+86-13806639241
+86-574-86574666

Material: carbon steel; Specifications: M5-M24; Length: 20mm~250mm;Surface treatment: nature, black, galvanized, rohs, hot galvanized, dacromet; Grade: 4.8~12.9

Similar Standards

1	[ASME/ANSI] ASME/ANSI B 18.2.1 - 1996	Square Bolts View Suppliers
2	[ASME] ASME B 18.2.1 - 2012	Square Head Bolts [Table 1] (ASTM A307 / A354 / A394) View Suppliers
3	[GB] GB 8 - 1988	Square Head Bolts - Product Grade C View Suppliers
4	[GB] GB /T 8 - 2021	Square Head Bolts - Product Grade C View Suppliers
5	[GB] GB 8 - 1976	Square Head Bolts - Product Grade C View Suppliers
6	[ASME] ASME B 18.2.1 - 2010	Askew Head Bolts
7	[ASME] ASME B 18.2.1 - 2012	Askew Head Bolts [Table 4] (ASTM A307 / A354 / A394)
8	[DIN] DIN 21346 - 1989	Square Head Bolts For Shaft Guides
9	[ASME] ASME B 18.2.3.10M - 1996	Metric Square Head Bolts
10	[JIS] JIS B 1182 - 1995	Large Square Head Bolts
11	[JIS] JIS B 1182 - 1995	Thin Square Head Bolts
12	[UNI] UNI 5729 - 1965	Large square head bolts and bolts with square nut - metric coarse thread - Finish C
13	[BS] BS 916 - 1953	Square bolts faced under head, and faced under head and turned on shank with B.S.Threads - Black [Table 2]
14	[BS] BS 916 - 1953	Square Head Screws faced under head with B.S.Threads - Black [Table 2]
15	[BS] BS 916 - 1953	Square Head Bolt with B.S.Threads [Table 1]
16	[BS] BS 916 - 1953	Spuare Head Screws with B.S.Threads [Table 1]
17	[JIS] JIS E 1107 - 2008	Fish Plate Bolt Square Head
18	[GB] GB /T 35 - 2013	Square Head Bolts With Small Head
19	[JIS] JIS B 1182 - 1995	Square Head Bolts
20	[GB] GB /T 35 - 1988	Small square head bolts
21	[JIS] JIS B 1182 - 1995	Square Head Bolts
22	[GOST] GOST 21249 (-1) - 1996	Blunt Bolts for General Purpose - Basic Parameters and Dimensions
23	[GOST] GOST 21249 (-2) - 1996	Blunt Bolts for General Purpose - Basic Parameters and Dimensions
24	[CNS] CNS 4699 - 1982	Square Head Bolts For Wooden Guide Plates
25	[CNS] CNS 3134 - 1981	Square Head Bolts (Finished)
26	[CNS] CNS 3135 - 1981	Square Head Bolts (Semi-Finished)
27	[CNS] CNS 3136 - 1981	Square Head Bolts (Regular)
28	[CNS] CNS 3137 - 1981	Large Square Head Bolts (Regular)