JIS B 1180 Standard

Dimensions of hexagon head screw bolts, coarse, product Grade A and B (First selection)
Dimensions of hexagon head screw bolts, coarse, product Grade A and B (Second selection)
Product specifications of nominal diameter hexagon head screw bolts, coarse, product Grade A and B
Dimensions of hexagon head screw bolts, coarse, product Grade C (First selection)
Dimensions of hexagon head screw bolts, coarse, product Grade C (Second selection)
Product specifications of nominal diameter hexagon head screw bolts, coarse, product Grade C

Nominal diamter hexagon head screw bolts, coarse, product grades A and B

Hexagon head screw bolts, coarse, product grade A and B

Notes

β = 15° to 30°
point shall be chamfered. For threads of M4 or under it may be as-rolled (see JIS B 1003).
Incomplete thread length at thread point u ≤ 2P.
Reference datum for d_w.
d_a is approximately equal to the pitch diameter of the thread.
Premissible shape.

Dimensions of heaxgon head screw bolts, coarse, product grade A and B (first selection)

Unit:mm

Designation of thread (d)					M1.6	M2	M2.5	M3	M4	M5	M6
P ^a)					0.35	0.4	0.45	0.5	0.7	0.8	1
a			max.^b)		1.05	1.2	1.35	1.5	2.1	2.4	3
a			min.		0.35	0.4	0.45	0.5	0.7	0.8	1
c			max.		0.25	0.25	0.25	0.40	0.40	0.50	0.50
c			min.		0.10	0.10	0.10	0.15	0.15	0.15	0.15
d_a			max.		2	2.6	3.1	3.6	4.7	5.7	6.8
d_w	Product grade	A	min.		2.27	3.07	4.07	4.57	5.88	6.88	8.88
d_w	Product grade	B	min.		2.30	2.95	3.95	4.45	5.74	6.74	8.74
e	Product grade	A	min.		3.41	4.32	5.45	6.01	7.66	8.79	11.05
e	Product grade	B	min.		3.28	4.18	5.32	5.88	7.50	8.63	10.89
k	Reference dimensions				1.1	1.4	1.7	2	2.8	3.5	4
	Product grade	A	max.		1.225	1.525	1.825	2.125	2.925	3.65	4.15
	Product grade	A	min.		0.975	1.275	1.575	1.875	2.675	3.65	3.85
	Product grade	B	max.		1.3	1.6	1.9	2.2	3.0	3.74	4.24
	Product grade	B	min.		0.9	1.2	1.5	1.8	2.6	3.26	3.76
k_w e)	Product grade	A	min.		0.68	0.89	1.10	1.31	1.87	2.35	2.70
k_w e)	Product grade	B	min.		0.63	0.84	1.05	1.26	1.82	2.28	2.63
r			min.		0.1	0.1	0.1	0.1	0.2	0.2	0.25
s	Reference dimension = max.				3.20	4.00	5.00	5.50	7.00	8.00	10.00
	Product grade	A	min.		3.02	3.82	4.82	5.32	6.78	7.78	9.78
	Product grade	B	min.		2.90	3.70	4.70	5.20	6.64	7.64	9.64
	Product grade
	A		B
	l
nom. length	min.	max.	min.	max.
2	1.8	2.2	--	--
3	2.8	3.2	--	--
4	3.76	4.24	--	--
5	4.76	5.24	--	--
6	5.76	6.24	--	--
8	7.71	8.29	--	--
10	9.71	10.29	--	--
12	11.65	12.35	--	--
16	15.65	16.35	--	--
20	19.58	20.42	18.95	21.05
25	24.58	25.42	23.95	26.05
30	29.58	30.42	28.95	31.05
35	34.5	35.5	33.75	36.25
40	39.5	40.5	38.75	41.25
45	44.5	45.5	43.75	46.25
50	49.5	50.5	48.75	51.25
55	54.4	55.6	53.5	56.5
60	59.4	60.6	58.5	61.5
65	64.4	65.6	63.5	66.5
70	69.4	70.6	68.5	71.5
80	79.4	80.6	78.5	81.5
90	89.3	90.7	88.25	91.75
100	99.3	100.7	98.25	101.75
110	109.3	110.7	108.25	111.75
120	119.3	120.7	118.25	121.75
130	129.2	130.8	128	132
140	139.2	140.8	138	142
150	149.2	150.8	148	152
160	--	--	158	162
180	--	--	178	182
200	--	--	197.7	202.3

Unit:mm

Designation of thread d					M8	M10	M12	M16	M20	M24
P^a					1.25	1.5	1.75	2	2.5	3
a			max.^b)		4	4.5	5.3	6	7.5	9
a			min		1.25	1.5	1.75	2	2.5	3
c			max.		0.60	0.08	0.08	0.08	0.08	0.08
c			min.		0.15	0.2	0.2	0.2	0.2	0.2
d_a			max.		9.2	11.2	13.7	17.7	22.4	26.4
d_w	Product grade	A	min.		11.63	14.63	16.63	22.49	28.19	33.61
d_w	Product grade	B	min.		11.47	14.47	16.47	22	27.7	33.26
e	Product grade	A	min.		14.38	17.77	20.03	26.75	33.53	39.98
e	Product grade	B	min.		14.20	17.59	19.85	26.17	32.95	39.55
k	Reference dimensions				5.3	6.4	7.5	10	12.5	15
	Product grade	A	max.		5.45	6.58	7.68	10.18	12.715	15.215
	Product grade	A	min.		5.15	6.22	7.32	9.82	12.285	14.785
	Product grade	B	max.		5.54	6.69	7.79	10.29	12.85	15.35
	Product grade	B	min.		5.06	6.11	7.21	9.71	12.15	14.65
k_w e)	Product grade	A	min.		3.61	4.35	5.12	6.87	8.6	10.35
k_w e)	Product grade	B	min.		3.54	4.28	5.05	6.8	8.51	10.26
r			min.		0.4	0.4	0.6	0.6	0.8	0.8
s	Reference dimension = max.				13.00	16.00	18.00	24.00	30.00	36.00
	Product grade	A	min.		12.73	15.73	17.73	23.67	29.67	35.38
	Product grade	B	min.		12.57	15.57	17.57	23.16	29.16	35.00
	Product grade
	A		B
	l
nom. length	min.	max.	min.	max.
2	1.8	2.2	--	--
3	2.8	3.2	--	--
4	3.76	4.24	--	--
5	4.76	5.24	--	--
6	5.76	6.24	--	--
8	7.71	8.29	--	--
10	9.71	10.29	--	--
12	11.65	12.35	--	--
16	15.65	16.35	--	--
20	19.58	20.42	18.95	21.05
25	24.58	25.42	23.95	26.05
30	29.58	30.42	28.95	31.05
35	34.5	35.5	33.75	36.25
40	39.5	40.5	38.75	41.25
45	44.5	45.5	43.75	46.25
50	49.5	50.5	48.75	51.25
55	54.4	55.6	53.5	56.5
60	59.4	60.6	58.5	61.5
65	64.4	65.6	63.5	66.5
70	69.4	70.6	68.5	71.5
80	79.4	80.6	78.5	81.5
90	89.3	90.7	88.25	91.75
100	99.3	100.7	98.25	101.75
110	109.3	110.7	108.25	111.75
120	119.3	120.7	118.25	121.75
130	129.2	130.8	128	132
140	139.2	140.8	138	142
150	149.2	150.8	148	152
160	--	--	158	162
180	--	--	178	182
200	--	--	197.7	202.3

Unit:mm

Designation of thread d					M30	M36	M42	M48	M56	M64
P^a					3.5	4	4.5	5	5.5	6
a			max.^b)		10.5	12	13.5	15	16.5	18
a			min		3.5	4	4.5	5	5.5	6
c			max.		0.8	0.8	1	1	1	1
c			min.		0.2	0.2	0.3	0.3	0.3	0.3
d_a			max.		33.4	39.4	45.6	52.6	63	71
d_w	Product grade	A	min.		--	--	--	--	--	--
d_w	Product grade	B	min.		42.75	51.11	59.95	69.45	78.66	86.16
e	Product grade	A	min.		--	--	--	--	--	--
e	Product grade	B	min.		50.85	60.79	71.3	82.6	93.56	104.86
k	Reference dimensions				18.7	22.5	26	30	35	40
	Product grade	A	max.		--	--	--	--	--	--
	Product grade	A	min.		--	--	--	--	--	--
	Product grade	B	max.		19.12	22.92	26.42	30.42	35.5	40.5
	Product grade	B	min.		18.28	22.08	25.58	29.58	34.5	39.5
k_w e)	Product grade	A	min.		--	--	--	--	--	--
k_w e)	Product grade	B	min.		12.8	15.46	17.91	20.71	24.15	27.65
r			min.		1	1	1.2	1.6	2	2
s	Reference dimension = max.				46	55.0	65.0	75.0	85.0	95.0
	Product grade	A	min.		--	--	--	--	--	--
	Product grade	B	min.		45	53.8	63.1	73.1	82.8	92.8
	Product grade
	A		B
	l
nom. length	min.	max.	min.	max.
2	1.8	2.2	--	--
3	2.8	3.2	--	--
4	3.76	4.24	--	--
5	4.76	5.24	--	--
6	5.76	6.24	--	--
8	7.71	8.29	--	--
10	9.71	10.29	--	--
12	11.65	12.35	--	--
16	15.65	16.35	--	--
20	19.58	20.42	18.95	21.05
25	24.58	25.42	23.95	26.05
30	29.58	30.42	28.95	31.05
35	34.5	35.5	33.75	36.25
40	39.5	40.5	38.75	41.25
45	44.5	45.5	43.75	46.25
50	49.5	50.5	48.75	51.25
55	54.4	55.6	53.5	56.5
60	59.4	60.6	58.5	61.5
65	64.4	65.6	63.5	66.5
70	69.4	70.6	68.5	71.5
80	79.4	80.6	78.5	81.5
90	89.3	90.7	88.25	91.75
100	99.3	100.7	98.25	101.75
110	109.3	110.7	108.25	111.75
120	119.3	120.7	118.25	121.75
130	129.2	130.8	128	132
140	139.2	140.8	138	142
150	149.2	150.8	148	152
160	--	--	158	162
180	--	--	178	182
200	--	--	197.7	202.3
The range of preferred lenghts is between the solid, bold, stepped line: -- for product grade A, above the discontinuous, stepped line; -- for product grade B, below this, stepped line; Notes a) P is the pitch of the thread. b) Values in accrodance with_{g_max.} normial series, in JIS B 1006. c)k_{m_min. = 0.7 k_min}

Dimensions of hexagon head screw bolts, coarse, product grades A and B (second selection)

Unit:mm

Designation of thread (d)					M3.5	M14	M18	M22	M27
P^a)					0.6	2	2.5	0.7	3
a			max.^b)		1.8	6	7.5	7.5	9
a			min.		0.6	2	2.5	2.5	3
c			max.		0.40	0.60	0.8	0.8	0.8
c			min.		0.15	0.15	0.2	0.2	0.2
d_a			max.		4.1	15.7	20.2	24.4	30.4
d_w	Product grade	A	min.		5.07	19.64	25.34	31.71	--
d_w	Product grade	B	min.		4.95	19.15	24.85	31.35	38
e	Product grade	A	min.		6.58	23.36	30.14	37.72	--
e	Product grade	B	min.		6.44	22.78	29.56	37.29	45.2
k	Reference dimensions				2.4	8.8	11.5	14	17
	Product grade	A	max.		2.525	8.98	11.715	14.215	--
	Product grade	A	min.		2.275	8.62	11.285	13.785	--
	Product grade	B	max.		2.6	9.09	11.85	14.35	17.35
	Product grade	B	min.		2.2	8.51	11.15	13.65	13.65
k_w e)	Product grade	A	min.		1.59	6.03	7.9	9.65	--
k_w e)	Product grade	B	min.		1.54	5.96	7.81	9.56	11.66
r			min.		0.1	0.6	0.6	0.8	1
s	Reference dimension = max.				6.00	21.00	27.00	34.00	41.00
	Product grade	A	min.		5.82	20.67	26.67	33.38	--
	Product grade	B	min.		5.70	20.16	26.16	33.00	40
	Product grade
	A		B
	l
nom. length	min.	max.	min.	max.
8	7.71	8.29	--	--
10	9.71	10.29	--	--
12	11.65	12.35	--	--
16	15.65	16.35	--	--
20	19.58	20.42	--	--
25	24.58	25.42	--	--
30	29.58	30.42	--	--
35	34.5	35.5	--	--
40	39.5	40.5	38.75	41.25
45	44.5	45.5	43.75	46.25
50	49.5	50.5	48.75	51.25
55	54.4	55.6	53.5	56.5
60	59.4	60.6	58.5	61.5
65	64.4	65.6	63.5	66.5
70	69.4	70.6	68.5	71.5
80	79.4	80.6	78.5	81.5
90	89.3	90.7	88.25	91.75
100	99.3	100.7	98.25	101.75
110	109.3	110.7	108.25	111.75
120	119.3	120.7	118.25	121.75
130	129.2	130.78	128	132
140	139.2	140.8	138	142
150	149.2	150.8	148	152
160	--	--	158	162
180	--	--	178	182
200	--	--	197.7	202.3

Unit:mm

Designation of thread (d)					M33	M39	M45	M52	M60
P^a					35	4	4.5	5	5.5
a			max.^b)		10.5	12	13.5	15	16.5
a			min		3.5	4	4.5	5	5.5
c			max.		0.8	1.0	1.0	1.0	1.0
c			min.		0.2	0.3	0.3	0.3	0.3
d_a			max.		36.4	42.4	48.6	56.6	67
d_w	Product grade	A	min.		--	--	--	--	--
d_w	Product grade	B	min.		46.55	55.86	64.7	74.2	83.41
e	Product grade	A	min.		--	--	--	--	--
e	Product grade	B	min.		55.37	66.44	76.95	88.25	99.21
k	Reference dimensions				21	25	28	33	38
	Product grade	A	max.		--	--	--	--	--
	Product grade	A	min.		--	--	--	--	--
	Product grade	B	max.		21.42	25.42	28.42	33.5	38.5
	Product grade	B	min.		20.58	24.58	27.58	32.5	37.5
k_w e)	Product grade	A	min.		--	--	--	--	--
k_w e)	Product grade	B	min.		14.41	17.21	19.31	22.75	26.25
r			min.		1	1	1.2	1.6	2
s	Reference dimension = max.				50	60.0	70.0	80.0	90.0
	Product grade	A	min.		--	--	--	--	--
	Product grade	B	min.		49	58.8	68.1	78.1	87.8
	Product grade
	A		B
	l
nom. length	min.	max.	min.	max.
8	7.71	8.29	--	--
10	9.71	10.29	--	--
12	11.65	12.35	--	--
16	15.65	16.35	--	--
20	19.58	20.42	--	--
25	24.58	25.42	--	--
30	29.58	30.42	--	--
35	34.5	35.5	--	--
40	39.5	40.5	38.75	41.25
45	44.5	45.5	43.75	46.25
50	49.5	50.5	48.75	51.25
55	54.4	55.6	53.5	56.5
60	59.4	60.6	58.5	61.5
65	64.4	65.6	63.5	66.5
70	69.4	70.6	68.5	71.5
80	79.4	80.6	78.5	81.5
90	89.3	90.7	88.25	91.75
100	99.3	100.7	98.25	101.75
110	109.3	110.7	108.25	111.75
120	119.3	120.7	118.25	121.75
130	129.2	130.78	128	132
140	139.2	140.8	138	142
150	149.2	150.8	148	152
160	--	--	158	162
180	--	--	178	182
200	--	--	197.7	202.3
The range of preferred lenghts is between the solid, bold, stepped line: -- for product grade A, above the discontinuous, stepped line; -- for product grade B, below this, stepped line; Notes a) P is the pitch of the thread. b) Values in accrodance with_{g_max.} normial series, in JIS B 1006. c)k_{m_min. = 0.7 k_min}

Product specifications of nominal diameter hexagon head screw bolts, coarse, product grade A and B

Material		Steel	Stainless steel	Non-ferrous metal
General requirements	Applicable standard	JIS B 1099
Thread	Tolerance class	6g
Thread	Applicable standard	JIS B 0205-4, JIS B 0209-1
Mechanical properties	Property class^a)	d < 3 mm: as agreed 3 mm ≤ d ≤ 39 mm: 5.6, 8.8, 9.8, 10.9 d > 39 mm: as agreed	d ≤ 24 mm: A2-70, A4-70 24 mm < d ≤ 39 mm: A2-50, A4-50 d > 39 mm: as agreed	Material are specified in JIS B 1057.
Mechanical properties	Applicable standard	3 mm ≤ d ≤ 39 mm: JIS B 1051 d > 39 mm: as agreed	3 mm ≤ d ≤ 39 mm: JIS B 1054-1 d > 39 mm: as agreed	Material are specified in JIS B 1057.
Tolerance	Product grade	For d ≤ 24 mm and l ≤ 10d or l ≤ 150 mm ^b): A For d > 24 mm or l > 10d or l > 150 mm ^b) : B
Tolerance	Applicable standard	JIS B 1021
Finish--Coating		As processed Requirements for electroplating are speci fied in JIS B 1044. Requirements for non-electrolytically applied zinc flake coatings are specified in JIS B 1046.	As processed	As processed Requirements for electroplating are specified in JIS B 1044.
Finish--Coating		Additional requirements or other finishes or coatings shall be agreed between the purchaser and the manufacturer.
Surface intergrity		Limits for surface discontinuous are specified in JIS B 1041	--	--

Hexagon head screw bolts, coarse, product grades C

Hexagon head screw bolts, coarse, product grade C

Notes

β = 15° to 30°
End without special requirements.
Incomplete thread length at thread point u ≤ 2P.
Washer face premissible
Reference datum for d_w.
d_s is approximately equal to the pitch diameter of the thread.
Premissible shape.

Dimensions of hexagon head screw bolts, coarse, product grade C (First selection)

Unit:mm

Designation of thread(d)			M5	M6	M8	M10	M12	M16	M20	M24	M30	M36	M42	M48	M56	M64
P^a)			0.8	1	1.25	1.5	1.75	2	2.5	3	3.5	4	4.5	5	5.5	6
a	max.		2.4	3	4.00	45	5.30	6	7.5	9	10.5	12	13.5	15	16.5	18
a	min.		0.8	1	1.25	1.5	1.75	2	2.5	3	3.5	4	4.5	5	5.5	6
c	max.		0.5	0.5	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8	1	1	1	1
d_a	max.		6	7.2	10.2	12.2	14.7	18.7	24.4	28.4	35.4	42.4	48.4	56.4	67	75
d_w	min.		6.74	8.74	11.74	14.74	16.74	22	27.7	32.25	42.75	51.11	59.95	69.45	78.66	88.16
e	min.		8.63	10.89	14.2	17.59	19.85	26.17	32.95	39.55	50.85	60.79	71.3	82.6	93.56	104.86
k	Ref dimn		3.5	4	5.3	6.4	7.5	10	12.5	15	18.7	22.5	26	30	35	40
	max.		3.875	4.375	5.675	6.85	7.95	10.75	13.4	15.9	19.75	23.55	27.05	31.05	36.25	41.25
	min.		3.125	3.625	4.925	5.95	7.05	9.25	11.6	14.1	17.65	21.45	24.95	28.95	33.75	38.75
k_w b)	min.		2.19	2.54	3.45	4.17	4.94	6.48	8.12	9.87	12.36	15.02	17.47	20.27	23.63	27.13
r	min.		0.2	0.25	0.4	0.4	0.6	0.6	0.8	0.8	1	1	1.2	1.6	2	2
s	Ref dimn=max.		8.00	10.00	13.00	16.00	18.00	24.00	30.00	36	46	55.0	65.0	75.0	85.0	95.0
s	min.		7.64	9.64	12.57	15.57	17.57	23.16	29.16	35	45	53.8	63.1	73.1	82.8	92.8
l ^e)
nominal length	min.	max.
10	9.25	10.75
12	11.1	12.9
16	15.1	16.9
20	18.95	21.05
25	23.95	26.05
30	28.95	31.05
35	33.75	36.25
40	38.75	41.25
45	43.75	46.25
50	48.75	51.25
55	53.5	56.5
60	58.5	61.5
65	63.5	66.5
70	68.5	71.5
80	78.5	81.5
90	88.25	91.75
100	98.25	101.75
110	108.25	111.75

Unit:mm

Designation of thread d
l^e)
nominal length	min.	max.
120	118.25	121.75
130	128	132
140	138	142
150	148	152
160	156	164
180	176	184
200	195.4	204.6
220	215.4	224.6
240	235.4	244.6
260	254.8	265.2
280	274.84	285.2
300	294.8	305.2
320	34.3	325.7
340	334.3	345.7
360	354.3	365.7
380	374.3	385.7
400	394.3	405.7
420	413.7	426.3
440	433.7	446.3
460	453.7	466.3
480	473.7	486.3
500	493.7	506.3
Notes P is the pitch of the thread. k_w.min = 0.7 k_min The range of preferred lengths is between the solid , stepped lines.

Dimensions of hexagon head screw bolts, coarse, product grades C (second selection)

Unit:mm

Designation of thread (d)			M14	M18	M22	M27	M33	M39	M45	M52	M60
P ^a)			2	2.5	2.5	3	3.5	4	4.5	5	5.5
a	max.		6	7.5	7.5	9	10.5	12	13.5	15	16.5
a	min.		2	2.5	2.5	3	3.5	4	4.5	5	5.5
c	max.		0.6	0.8	0.8	0.8	0.8	1	1	1	1
d_a	max.		16.7	21.2	26.4	32.4	38.4	54.4	52.6	62.6	71
d_w	min.		19.15	24.85	31.35	38	46.55	55.86	64.7	74.2	83.41
e	min.		22.78	29.56	37.29	45.2	55.37	66.44	76.95	88.25	99.21
k	Reference dimensions		8.8	11.5	14	17	21	25	28	33	38
	max.		9.25	12.4	14.9	17.9	22.05	26.05	29.05	34.05	39.05
	min.		8.35	10.6	13.1	16.1	19.95	29.95	26.95	31.75	36.75
k_w b)	min.		5.85	7.42	9.17	11.27	13.97	16.77	18.87	22.23	25.73
r	min.		0.6	0.6	0.8	1	1	1	1.2	1.6	2
s	Reference dimension = max.		21.00	27.00	34	41	50	60.0	70.0	80.0	90.0
s	min.		20.16	26.16	33	40	49	58.8	68.1	78.1	87.8
l^e)
nominal length	min.	max.
30	28.95	31.05
35	33.75	36.25
40	38.75	41.25
45	43.75	46.25
50	48.75	51.25
55	53.5	56.5
60	58.5	61.5
65	63.5	66.5
70	68.75	71.5
80	78.5	81.5
90	88.25	91.75
100	98.25	101.75
110	108.25	111.75
120	118.25	121.75
130	128	132
140	138	142
150	148	152
160	156	164

Unit:mm

Designation of thread (d)
l ^e)
nominal length	min.	max.
180	176	184
200	195.4	204.6
220	215.4	224.6
240	235.4	244.6
260	2548.	265.2
280	274.8	285.2
300	394.8	305.2
320	314.3	325.7
340	334.3	345.7
360	354.3	365.7
380	374.3	385.7
400	394.3	405.7
420	413.7	426.3
440	433.7	446.3
460	453.7	466.3
480	473.7	486.3
500	493.7	506.3
Notes P is the pitch of the thread. k_w.min = 0.7 k_min The range of prefered lengths is between the solid, bold, stepped lines.

Product specifications of nominal diameter hexagon head screw bolts, coarse, product grade C

Material		Steel
General requirements	Applicable standard	JIS B 1099
Thread	Tolerance class	8g
Thread	Applicable standard	JIS B 0205-4, JIS B 0209-1
Mechanical properties	Property class^a)	d ≤ 39 mm: 4.6, 4.8 d > 39 mm: as agreed
Mechanical properties	Applicable standard	d ≤ 39 mm: JIS B 1051 d > 39 mm: as agreed
Tolerance	Product grade	C
Tolerance	Applicable standard	JIS B 1021
Finish--Coating		As processed Requirements for electroplating are specified in JIS B 1044. Requirements for non-electrolytically applied zinc flake coatings are specified in JIS B 1046. Additional requirements or other finishes or coatings shall be agreed between the purchaser and the manufacturer.
Acceptabolity		Acceptance inspection is specified in JIS B 1091.
Note ^a) Other property classes are specified in JIS B 1051.