Click Specification

(Non-preferred) dimensions in parentheses.

Small Hexagon Head Bolts, Finished

JIS B 1180 (AT2.1) - 2004

Display drawing:

Nominal Length L Tips:seclect Nominal Length L and get Thread length.

Screw Thread
d

M10

M12

(M14)

M16

(M18)

M20

(M22)

M24

(M27)

M30

(M33)

M36

(M39)

P	Pitch	coarse thread
		Fine thread
d_s	max
	min
k	Nominal Size
	max
	min
s	max
	min
e	≈
D	≈
r	min
d_a	max
z	≈
c	≈

1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3	3.5	3.5	4	4
1	1.25	1.25	1.5	1.5	1.5	1.5	1.5	2	2	2	2	3	3
8	10	12	14	16	18	20	22	24	27	30	33	36	39
7.85	9.85	11.8	13.8	15.8	17.8	19.8	21.8	23.8	26.8	29.8	32.75	35.75	38.75
5.5	7	8	9	10	12	13	14	15	17	19	21	23	25
5.65	7.15	8.2	9.2	10.2	12.2	13.2	14.2	15.2	17.2	19.25	21.25	23.25	25.25
5.35	6.85	7.8	8.8	9.8	11.8	12.8	13.8	14.8	16.8	18.75	20.75	22.75	24.75
12	14	17	19	22	24	27	30	32	36	41	46	50	55
11.75	13.75	16.75	18.65	21.65	23.65	26.65	29.65	31.6	35.6	40.6	45.6	49.6	54.55
13.9	16.2	19.6	21.9	25.4	27.7	31.2	34.6	37	41.6	47.3	53.1	57.7	63.5
11.5	13.5	16.5	18	21	23	26	29	31	34	39	44	48	53
0.4	0.4	0.6	0.6	0.6	0.6	0.8	0.8	0.8	1	1	1	1	1
9.2	11.2	13.7	15.7	17.7	20.2	22.4	24.4	26.4	30.4	33.4	36.4	39.4	42.4
1.2	1.5	2	2	2	2.5	2.5	2.5	3	3	3.5	3.5	4	4
0.4	0.4	0.6	0.6	0.6	0.6	0.6	0.6	0.6	/	/	/	/	/

Length of Thread b

①,b + x ≥ L: full thread, x=2P.

Alternative history

JIS B 1180AT2.1 - 1994 JIS B 1180AT2.1 - 2004

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Similar Standards

1	[GB] GB 21 - 1976	Small Hexagon Head Bolts View Suppliers
2	[JIS] JIS B 1180 (AT2.2) - 1994	Small Hexagon Head Bolts, Semifinished [Annex Attached Table 2.2.]
3	[GB] GB 22 - 1976	Bolts, Small Hexagon Head with Fit Neck
4	[JIS] JIS B 1180 (AT2.1) - 1994	Small Hexagon Head Bolts, Finished [Annex Attached Table 2.1]
5	[JIS] JIS B 1180 (AT2.2) - 2004	Small Hexagon Bead Bolt, Semi-Finished
6	[CNS] CNS 4700 - 1987	Small Hexagon Head Bolts with Thread Approximately To Head, Small Widths Across Flats
7	[CNS] CNS 3120 - 1987	Hexagon Bolts with Small Widths Across Flats
8	[GOST] GOST 7811 (-5) - 1970	Hexagon Reduced Head Bolts with Guide Neck Product Grade A, Type 5
9	[GOST] GOST 7811 (-4) - 1970	Hexagon Reduced Head Bolts with Guide Neck Product Grade A, Type 4
10	[GOST] GOST 7811 (-3) - 1970	Hexagon Reduced Head Bolts with Guide Neck Product Grade A, Type 3
11	[GOST] GOST 7811 (-2) - 1970	Hexagon Reduced Head Bolts with Guide Neck Product Grade A, Type 2
12	[GOST] GOST 7811 (-1) - 1970	Hexagon Reduced Head Bolts with Guide Neck Product Grade A, Type 1
13	[GOST] GOST 7795 (Type 5) - 1970	Hexagon Bolts with Reduced Head and Guide Neck, Precision Class B, Type 5
14	[GOST] GOST 7795 (Type 4) - 1970	Hexagon Bolts with Reduced Head and Guide Neck, Precision Class B, Type 4
15	[GOST] GOST 7795 (Type 3) - 1970	Hexagon Bolts with Reduced Head and Guide Neck, Precision Class B, Type 3
16	[GOST] GOST 7795 (Type 2) - 1970	Hexagon Bolts with Reduced Head and Guide Neck, Precision Class B, Type 2
17	[GOST] GOST 7795 (Type 1) - 1970	Hexagon Bolts with Reduced Head and Guide Neck, Precision Class B, Type 1
18	[GOST] GOST 7817 - 1980	Product Grade A Fit Bolts with Hexagon Reduced Head