INDIAN STANDARD

HEXAGON HEAD BOLTS, SCREWS AND NUTS OF PRODUCT GRADE ‘C’

HEXAGON HEAD BOLTS

IS 1363 Part 1: 2002 / ISO 4016

Steel : 4.6, 4.8, 8.8, 10.9
Finish: Self, Zinc Plated, Hot Dip Galvanized

Screw Thread
d

M10

M12

(M14)

M16

(M18)

M20

(M22)

M24

(M27)

P	Pitch
b	L≤125
	125＜L≤200
	L＞200
c	max
d_a	max
d_s	max
d_s	min
d_w	min
e	min
k	Nominal Size
	max
	min
k₁	min
r	min
s	max=nominal size
s	min

0.8	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3	3
16	18	22	26	30	34	38	42	46	50	54	60
22	24	28	32	36	40	44	48	52	56	60	66
35	37	41	45	49	53	57	61	65	69	73	79
0.5	0.5	0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8	0.8
6	7.2	10.2	12.2	14.7	16.7	18.7	21.2	24.4	26.4	28.4	32.4
5.48	6.48	8.58	10.58	12.7	14.7	16.7	18.7	20.84	22.84	24.84	27.84
4.52	5.52	7.42	9.42	11.3	13.3	15.3	17.3	19.16	21.16	23.16	26.16
6.74	8.74	11.47	14.47	16.47	19.15	22	24.85	27.7	31.35	33.25	38
8.63	10.89	14.2	17.59	19.85	22.78	26.17	29.56	32.95	37.29	39.55	45.2
3.5	4	5.3	6.4	7.5	8.8	10	11.5	12.5	14	15	17
3.875	4.375	5.675	6.85	7.95	9.25	10.75	12.4	13.4	14.9	15.9	17.9
3.125	3.625	4.925	5.95	7.05	8.35	9.25	10.6	11.6	13.1	14.1	16.1
2.19	2.54	3.45	4.17	4.94	5.85	6.48	7.42	8.12	9.17	9.87	11.27
0.2	0.25	0.4	0.4	0.6	0.6	0.6	0.6	0.8	0.8	0.8	1
8	10	13	16	18	21	24	27	30	34	36	41
7.64	9.64	12.57	15.57	17.57	20.16	23.16	26.16	29.16	33	35	40

Length of Thread b

–

Screw Thread
d

M30

(M33)

M36

(M39)

M42

(M45)

M48

(M52)

M56

(M60)

M64

P	Pitch
b	L≤125
	125＜L≤200
	L＞200
c	max
d_a	max
d_s	max
d_s	min
d_w	min
e	min
k	Nominal Size
	max
	min
k₁	min
r	min
s	max=nominal size
s	min

3.5	3.5	4	4	4.5	4.5	5	5	5.5	5.5	6
66	–	–	–	–	–	–	–	–	–	–
72	78	84	90	96	102	108	116	–	–	–
85	91	97	103	109	115	121	129	137	145	153
0.8	0.8	0.8	1	1	1	1	1	1	1	1
35.4	38.4	42.4	45.4	48.6	52.6	56.6	62.6	67	71	75
30.84	34	37	40	43	46	49	53.2	57.2	61.2	65.2
29.16	32	35	38	41	44	47	50.8	54.8	58.8	62.8
42.75	46.55	51.11	55.86	59.95	64.7	69.45	74.2	78.66	83.41	88.16
50.85	55.37	60.79	66.44	71.3	76.95	82.6	88.25	93.56	99.21	104.86
18.7	21	22.5	25	26	28	30	33	35	38	40
19.75	22.05	23.55	26.05	27.05	29.05	31.05	34.25	36.25	39.25	41.25
17.65	19.95	21.45	23.95	24.95	26.95	28.95	31.75	33.75	36.75	38.75
12.36	13.97	15.02	16.77	17.47	18.87	20.27	22.23	23.63	25.73	27.13
1	1	1	1	1.2	1.2	1.6	1.6	2	2	2
46	50	55	60	65	70	75	80	85	90	95
45	49	53.8	58.8	63.1	68.1	73.1	78.1	82.8	87.8	92.8

Length of Thread b

–

IS 1363 / ISO 4016:1999 ‘Hexagon head bolts — Product grade C

This Indian Standard (Part 1) (Fourth Revision) which is indistinguishable with ISO 4016:1999 ‘Hexagon head bolts — Product grade C’ gave by the International Organization for Standardization (ISO) was taken on by the Bureau of Indian Standards on the proposal of the Bolts, Nuts and Fasteners Accessories Sectional Committee and endorsement of the Basic and Production Engineering Division Council.

IS 1363 / ISO 4016

IS 1363 was initially distributed in 1960 and first overhauled in 1967. Resulting to the distribution of 1967 version, many changes had been settled upon at worldwide level which have been reflected in IS 1367 series of norms covering ‘Specialized stock conditions for strung steel din’. In like manner, the second amendment was distributed in 1984 parting the norm into 3 sections covering hexagon head bolts, hexagon head screws and hexagon nuts. The third amendment of this standard was distributed in 1992 by reception of IS 1363/ISO 4016:1988. This fourth amendment has been arranged by reception of most recent release of ISO 4016 distributed in 1999. The leftover pieces of the norm, that is, Part 2 and Part 3 have too been amended by taking on the relating most recent versions of ISO Standards distributed in 1999.

In 1967 rendition of this norm, the widths across level measurements for Ml O and M12 size clasp were indicated as 17 mm and 19 mm separately. Notwithstanding, in the 1984 rendition, these widths across level measurements were aligned with IS 1363/ ISO 4016:1979 and determined as 16 mm and 18 mm separately for Ml O and Ml 2 size latches. Perceiving the trouble of prompt changeover to new width across level measurements, the Committee chose to allow width across level measurements according to 1967 form, that is, 17 mm and 19 mm for M 10 and M 12 size latches till 31, December 1994. Presently it is expected that the whole latch industry would have exchanged over to new width across level measurements also, from 1 January 1995, no old width across level measurements will be allowed.