Inconel 718 Heavy Hex Bolts to ISO 7412 Hexagon Bolts For High Strength Structural Bolting

Shape And Dimensions Of Stud

ISO 7412 Hexagon Bolts For High Strength Structural Bolting Dimensions

Dimensions in millimetres

Thread size d			M12²⁾		M16		M20		(M22)³⁾		M24		(M27)³⁾		M30		M36
P⁴⁾			1.75		2		2.5		2.5		3		3		3,5		4
b_ref	⁵⁾		25		31		36		38		41		44		49		56
b_ref	⁶⁾		32		38		43		45		48		51		56		63
c	max.		0.8		0.8		0.8		0.8		0.8		0.8		0.8		0.8
c	min.		0.4		0.4		0.4		0.4		0.4		0.4		0.4		0.4
d_a	max.		14.7		18.7		23.24		25.24		27.64		31.24		34.24		41.00
d_s	max.		12.70		16.70		20.84		22.84		24.84		27.84		30.84		37.84
d_s	min.		11.30		15.30		19.16		21.16		21.16		26.16		29.16		35.00
d_w	max.		⁷⁾		⁷⁾		⁷⁾		⁷⁾		⁷⁾		⁷⁾		⁷⁾		⁷⁾
d_w	min.		19.2		24.9		31.4		33.3		38.0		42.8		46.5		55.9
e	min.		22.78		29.56		37.29		39.55		45.20		50.85		55.37		66.44
k	nom.		7.5		10		12.5		14		15		17		18.7		22.5
	max.		7.95		10.75		13.40		14.90		15.90		17.90		19.75		23.55
	min.		7.05		9.25		11.60		13.10		14.10		16.10		17.65		21.45
k'	min.		4.9		6.5		8.1		9.2		9.9		11.3		12.4		15.0
r	min.		0.6		0.6		0.8		0.8		1.0		1.2		1.2		1.5
s	max.		21		27		34		36		41		46		50		60
s	min.		20.16		26.16		33		35		40		45		49		58.8
l			l_{s and l_g⁸⁾}
nom.	min.	max.	l_s min.	l_g max.	l_s min.	l_g max.	l_s min.	l_g max.	l_s min.	l_g max.	l_s min.	l_g max.	l_s min.	l_g max.	l_s min.	l_g max.	l_s min.	l_g max.
30	28.95	31.05
35	33.75	36.25
40	38.75	41.25	9.8	15
45	43.75	46.25	14.8	20	8	14
50	48.75	51.25	19.8	25	13	19
55	53.5	56.5	24.8	30	18	24	11.5	19
60	58.5	61.5	29.8	35	23	29	16.5	24	14.5	22
65	63.5	66.5	34.8	40	28	34	21.5	29	19.5	27	15	24
70	68.5	71.5	39.8	45	33	39	26.5	34	24.5	32	20	29	17	26
75	73.5	76.5	44.8	50	38	44	31.5	39	29.5	37	25	34	22	31
80	78.5	81.5	49.8	55	43	49	36.5	44	34.5	42	30	39	27	36	20.5	31
85	83.25	86.75	54.8	60	48	54	41.5	49	39.5	47	35	44	32	41	25.5	36
90	88.25	91.75	59.8	65	53	59	46.5	54	44.5	52	40	49	37	46	30.5	41	22	34
95	93.25	96.75	64.8	70	58	64	51.5	59	49.5	57	45	54	42	51	35.5	46	27	39
100	98.25	101.75	69.8	75	63	69	56.5	64	54.5	62	50	59	47	56	40.5	51	32	44
110	108.25	111.75			66	72	59.5	67	57.5	65	53	62	50	59	43.5	54	35	47
120	118.25	121.75			76	82	69.5	77	67.5	75	63	72	60	69	53.5	64	45	57
130	128	132			86	92	79.5	87	77.5	85	73	82	70	79	63.5	74	55	67
140	138	142			96	102	89.5	97	87.5	95	83	92	80	89	73.5	84	65	77
150	148	152			106	112	99.5	107	97.5	105	93	102	90	99	83.5	94	75	87
160	156	164									103	112	100	109	93.5	104	85	97
170	166	174									113	122	110	119	103.5	114	95	107
180	176	184									123	132	120	129	113.5	124	105	117
190	186	194									133	142	130	139	123.5	134	115	127
200	196	204									143	152	140	149	133.5	144	125	137

1) For hot-dip galvanized bolts, the above dimensions apply before galvanizing.
2) None-preferred for technical reasons.
3) Indicates second choice diameter.
4) P = pitch of thread
5) For lengths l_nom < 100 mm.
6) For lengths I_nom > 100 mm.
7) d_wmax = s _actual
8) l_{g max} = l_nom - b _ref
l_{s min} = l_{g max} - 3 P
NOte -- The popular lenghts are shown between heavy lines.