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AMENDMBNT NO. 1 MARCH 1981
TO
IS: 1862 -1975 SPECIFICATION FoR STUDS
a

('secoid Revision )
Alteratione

( Pagc l, clause 3 ) Substitute the following for the existing clause:

-
'3. Types - Three types as follows:
Type A bt 1 d, suitable for use in steel.
- bt== l'5
suitable for use in cast iron.
Type B
Type C
- bt= 2 d,d,suitable for use in aluminium alloys.
-
Noto For values of bl, see Tables I and 2.'
-
l, clause 4 ) Substitute the following for the existing clause:
( Pagc
-
"4. Grade- Giade A as specified in lS:1367 ( Part ll)-1979 'Technical supply conditions {or
threaded steel iasteners: Part ll Product grades and tolerances (second revision )'.
( Pagc 2, Tablc | ):.
a) Figurc Substitute the following fcr the existing 6gute:
-

z according to lS : 1368-1967 ' Dlmensions ol ends of botts and screws ( first revision )'.
r according to lS I 1369-1975 'Dimensions ol screw thread runouts and undercuts (/?rsl revision )'
Note - Machined threads and rounded end.at nut end also permltted.

b) Tenlh Column, la;t three cnlries Substitute the follorving for the eristing entries:
-
2A
20'65
1 9'35

c) Foot-notcwith'*' nark- Delete.

( Page 2, Tablc 2 ):
a) Figurc- Substitute the following for the existing figure:

tz according to lS: t368-1967'Dimensions of ends of bolts

and screvvs (first revision)'.
r according to lS : 1369-1975 ' Diqensions of screw thread run-ouis and undercuts ( frsl revisian )'-"
Note lvlachined threads and rounded end at nut end also permitted.
-
 882.219-4 ( Fifth Reprint MARCH 1999
lS:1862-1975
) ( Roatfirmed 1996 )

Indian Standard
SPECIFICATION FOR STU DS
(Second Revision)

1. Scope - Covers the requirements for studs in the diameter range from 3 to 39 mm.
2. Terminology As given in Fig. 1 and the following definitions-
2.1 Metal End - The end of the stud which is screwed into the component.

I 2.2 Nut End The end of the stud which is not screwed into the component.
c.{
o!
-
r-
c-I
o
o
U
;
l
*o tc

d.
r
G
CHAMFER
RUNOUT RUNOUT

_l DIA OF
O STUO
(]
g

'-c
ci
o
-METAL
LENGTH
END NUI END
LE NGTH
I
e
o NOMINAL LENGTH ___i
;c
FIG. 1 NJMENCLATURE OF STUD
I
tr
J')

:o
o
3. Types - Three types as follows:
c Type A recommenijecl for use in steel.
o -
Type B recommended for use in cast iron.
q
oq
-
Type C reconlmended for use in alumihiunr alloys.
-
.:
4. Grade - Precision Grade (P) and Black Grade (B) as specified in lS: 1367-1967 'Technical supply
conditiorts for threaded fasteners (f irst revision)' .

""1
o
(!
5. Dimensions
5.1 As given in Table 1 for the size range M3 to M14.
5.2 As given in Table 2 for the size range lr4i 6 to M39.

5.3 The preferred length size combinations {or Type A and iype B studs shall be as given in Table 3.

5.4 The preferred length size conrbinations for Type C studs shall be as given in Table 4.

5.5 ThescrewthreaddimensionsfortlremetalencJofthestudshall conformtothosespecifiedinls:2186-

t g6; 'Oimensions for external interference {it threads'.

Adopted 22 January 1 975 (u May 1975, BIS Gr2

BUREAU OF INDIAN STANOARDS

MANAK BH/rVAN,9 BAHADUR SHAIl ZAFAR MAiiG
NE\\'DEtl.il',l10002
 1

/S: 1862 - 1975

TABLE 1 DtMENStorrrs rogrs
lcraase b.l )
All dimensions in miliimelres.

(tirstrcvision)
.;:::slfll8li!_3:i333:i39i:Bin:ni:n:l::::.:it:r,s,andscrews
.xr:normatt-t bp'ri;;; run_out as per ts, .1aur.-?Jiiird run-ours anit rno"i"rt-."(t)rst revision),
Nominal Size d
hl3
I rurs (M3.5) (M4 5) M5 MB M10 M12 (M14)
M8x M10x M12x
1
(M14 i
1.25
b 1-2P Forlq 125 12 13
16
1.25 1 '5)
1B
-o 125<l<200
TypeA Nom I i-- -l----l-l
35 l4 "' I ro l40
l-*
il I *'-?;' II ouz
lil
yj; I
| -' tl5i:l;;iiii,
Min 1
3
i.e I +'tt
13, I 1""
|l!39
aaz
462
I g-- I i-ro illiuu
q_
l:lgli::lidas
?!9I9lqI6+sj104s
soi I| j.ci ';;;
r' -l;-
|Iii
Non | 45
b,(js16) | Typeo Nomt 45 I ;s i o i z-il.
II ssz ;6; I
l'::: I lr55
"-"
11 4s I
1455
rs.qs
-----r--r- l .l
-l; ''
Y.e, l +ii
f99 lssal6:eJiool
I eJo t /45 I i3^13.-l:l--i1s
7ss lrs
I ru
Min I I iE; I 562 I oss | l:: 70b rI 855 liiss Iir.l??3
5 liiss
s+s
rr'," iv llg?! lzros
iiss 121
Type c Nom I | 11 +s j. r+as I i;iE I id:B
Max
-r-r i 845 I _ I _ I
I I 16
ll9__ I _ I-_l24
Min l_ l_ l;5;i- l: i_ l:pqll liios
| 15
.rn"yll-';i;,lt'
'r.c run_out rn tno metal end ofthe stud
any unthreadea e*tiuJuJ po.tton is to ou--"' "
p'srcrErce.
-l+
45
-:--r r3.3u- I

;0i""'"""','iJirr""-"rt"Tt;j.,:t"o only up to ihe iasr scraich cf the thread anddoesnorincrude

TABLE 2 DTMENsToNS FoR^sruoffiffi

(Clause TO 39 mm)
5.2)'
All dimensions in millimetres

z according to lS: 1 368_1 967.

x according to lS:1369_1975.
*xr-norffiol ry2.5p thread run-out as per lS:
1 369-1 975.

Nominal Size d Ml6 .(_y.18) l Mzo l1uzz1 ta24 (M27)

M'l 6x ({18x M2or ltMzzn M30 (M33)
I(russ:.
1.5 1.s) II 1s l'rst M24
a
X (M27
2)
>: M30 x
1
(M33r2) ron*;1
31
b +-2P
-0
Forl (125
125 < l<200
For I >-20O
3B
44
42
4B
46
q)
50
56
54
60
60
66
66
J

t--*
It^.t o4
|
I

57 72
lsoI
I
61 65 69 73 79
Type A Nom 16 1B ')i aa
14 27
I 103
.i---*_._*t I

Max
Min
16.55 18.55 20 65 22 65 24 65 27'65
30
I :g
I sgn
I
15.45 17.45 19 35 21 35 a2 .ac 30 65
6, (js16)
a Tvpe B Nom 27 30
26 35 ao.ac
l_
:ez I

36 405 I
- Max 24.65 27.65 30 65 2?-O
36.8 41.3
45
lszi
Min 23'3 s 26.35 4J JJ 2R_t
397
458 I soos
szss
a
It_._..-l
I
44.2
Type C Nom 32 40
I

Max
Min
32.8
31.2
408
?o I
l-l
t_t
Note *
Sizes shown within bracker,
. nre run-out in aru oiJoif nfil# rl t_t
_ tlre meral cno of rr,u ;:
any unlhreadr:o oiriui""i "iil"i.-i;
porrion adjacent onlv up to the last scrarch of the tl-rread
,. ,t,"i,lflljl,tlcrcd and does not include
 lS :1862-1975

TABLE 3 PREFERRED LENGTH-SIZE COMBINATIONS FOR TYPE A AND TYPE B STUDS

(C/ause 5.3)
All dimensions in millimetres.

Note 1 Sizes shorvn within brackets are of second preference.

Note 2 - Preferred tengths are between the stePPed bold lines.
Note 3 - See Fig. 2 and 3 for tolerances on length /,
-

TAELE 4 PREFERRED LENGTH.SIZE COMBINATIONS FOR TYPE C STUDS

(C/ause 5.4)
All dimensions in millimetres.

N ote 1 Preferred lengths aro between the stepped bold lines'

N ots 2 - See Fig. 2 and 3 for lolerances on length /'
-
 b) Fool-notc with'+' mark
-Delete.
( Page 3, Table 4 ) substitute the foilorving for the existing tablc:
-
TABLE 4 PREFERRED IEI.IGTH.SIZE COMBINATIONS FOR TYPE C STUDS
( C/ause 5.4 )

All dimensions ln millimetres.

Note I Preferred lengths are between the ii;pped bold iines.

-
Note 2-See Fig,2 and 3lor tolerances on iength l,
t;
. Acidenda

( Page l, clause 5.5 )the follorving new sentcnce at the end of the clause;
-Add
"Screw threads {or of the stud shall ccnform to 6 g tolerance
'ut end
1976 ' ISO metric scre'yv threads '."
-. -- class
-'""v sv
as €P
sp€cified in l$: zi21g_

( Pagc 3, Tablc 3, Natc 3 ) Add the folror.r'ing new Note after Note 3:
-
Note{-For studs abovsthe stepped bold line, thread lenglh, b=t_ (r +A).,

(EDC27)
I