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IS 6639 Hexagon Bolts For Structural Use

IS 1862 Studs / Double End Stud Bolts

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

IS 1862 Tolerance

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