Dimensions of IS 1862 Studs

All dimensions in millimetres.
z according to IS : 1368-1967. Dimensions of ends of bolts and screws
x according to IS : 1369-1975. Dimensions of screws thread run-outs and undercuts
x₁ = normal ≈ 2.5p thread run-out as per IS : 1369-1975.

Dimensions Table - size range 3 to 14 mm

Nominal size d h13			M 3	(M 3.5)	M 4	(M 4.5)	M 5	M 6	M 8 M 8 x 1	M 10 M 10 x 1.25	M 12 M 12 x 1.25	(M 14) (M 14 x 1.5)
b+2P - 0	For / < 125		12	13	14	15	16	18	22	26	30	34
	125 </< 200		-	-	-	-	-	-	-	32	36	40
b1(js16)	Type A	Nom	3	3.5	4	4.5	5	6	8	10	12	14
		Max	3.3	3.88	4.38	4.88	5.38	6.38	8.45	10.45	12.55	14.55
		Min	2.7	3.12	3.62	4.12	4.62	5.62	7.55	9.55	11.45	13.45
	Type B	Nom	4.5	5	6	7	7.5	9	12	15	18	21
		Max	4.88	5.38	6.38	7.45	7.95	9.45	12.55	15.55	18.55	21.65
		Min	4.12	4.52	5.62	6.55	7.05	8.55	11.45	14.45	17.45	20.35
	Type C	Nom	-	-	8	-	-	-	16	-	24	-
		Max	-	-	8.45	-	-	-	16.55	-	24.65	-
		Min	-	-	7.55	-	-	-	15.45	-	23.35	-

Dimensions Table - size range 16 to 39 mm

Nominal size d h13			M 16 M 16 x 1.5	(M 18) (M 18 x 1.5)	M 20 M 20 x 1.5	(M 22) (M 22 x 1.5)	M 24 M 24 x 2	M 27 (M 27 x 2)	M 30 M 30 x 2	(M 33) (M 33 x 2)	M 36 M 36 x 3	(M 39) (M 39 x 3)
b+2P - 0	For / < 125		38	42	46	50	54	60	66	78	78	84
	125 </< 200		44	48	52	56	60	65	72	78	84	90
	For l > 200		57	61	65	69	73	79	85	91	f	103
b1(js16)	Type A	Nom	16	18	20	22	24	27	30	33	36	39
		Max	16.55	18.55	20.55	22.65	24.65	27.65	30.65	33.8	36.8	39.8
		Min	15.45	17.45	19.35	21.35	23.35	26.35	29.35	32.2	35.2	38.2
	Type B	Nom	24	27	30	33	36	40.5	45	49.5	54	57
		Max	24.65	27.55	30.65	33.8	36.8	41.3	45.8	50.3	54.95	57.95
		Min	23.35	26.35	29.35	32.2	35.2	39.7	44.2	48.7	53.05	56.05
	Type C	Nom	32	-	40	-	-	-	-	-	-	-
		Max	32.8	-	40.8	-	-	-	-	-	-	-
		Min	31.2	-	39.2	-	-	-	-	-	-	-

Note :
Sizes shown within brackets are of second preference.
The run out in the metal end of the stud is to be considered only up to the last scratch of the thread and does not include any unthreaded extruded portion adjacent to the run-out

Types

Three types as follows:
Type A - b₁ ≈ 1 d, suitable for use in steel.
Type B - b₁ ≈ 1.5 d, suitable for use in cast Iron.
Type C - b₁ ≈ 2 d, suitable for use in aluminium alloys.

Preferred length size combinations for type A and type B studs

l	M 3	(M 3.5)	M 4	(M 4.5)	M 5	M 6	M 8 M 8 x 1	M 10 M 10 x 1.25	M 12 M 12 x 1.25	(M 14) (M 14 x 1.5)	M 16 M 16 x 1.5	(M 18) (M 18 x 1.5)	M 20 M 20 x 1.5	(M 22) (M 22 x 1.5)	M 24 M 24 x 2	(M 27) (M 27 x 2)	M 30 M 30 x 2	(M 33) (M 33 x 2)	M 36 M 36 x 3	(M 39) (M 39 x 3)
14
16
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
100
110
120
130
140
150
160
170
180
190
200
225
250
275
300

Note :
All dimensions in millimetres.
Sizes shown within brackets are of second preference.
Preferred lengths are between the stepped bold lines.

Preferred length size combinations for type A and type B studs

l	M 4	M 8 M 8 x 1	M 10 M 10 x 1.25	M 12 M 12 x 1.25	M 16 M 16 x 1.5	M 20 M 20 x 1.5
25
30
40
60
80
100
120
140
160
200

Note :
All dimensions in millimetres.
Preferred lengths are between the stepped bold lines.

Tolerances

Mechanical Properties

• Type A and Type B studs, made from steel, shall conform to property classes 4.6, 6.6, 8.8 and 10.9 of IS : 1367 - 1967 'Technical supply conditions for threaded fasteners (first revision)'
• Type C studs, made from steel, shall conform to property classes 4.6, 6.6 and 8.8 of IS : 1367 - 1967.
• General Requirements - In regard to requirements not covered in this standard, the studs shall comply with the requirements of IS : 1367-1967.
• Sampling - The sampling and criteria of acceptance shall be in accordance with IS : 2614 - 1969 'Methods for sampling of fasteners (first revision).
• Designation - Shall be designated by the name, type size, nominal length, number of this standard grade and symbol for mechanical property class.

Example :
A stud Type A, size M5, nominal length 25 mm, precision grade and mechanical property class 8.8 shall be designated as:
Stud A M5 x 25 IS : 1862 - P 8.8