DIN 939

(1)

DEUTSCHE NORM

February 1995

I I

Studs

with

a

length of

engagement equal to about

1,25

d

DIN

-

939

ICs 21.060.10 Supersedes December 1972 edition.

Descriptors: Fasteners, studs.

Stiftschrauben; Einschraubende z 1,25 d

In keeping with current practice in standards published by the International Organization for Standardization

(/SO),

a comma has been used throughout as the decimal marker:

Dimensions in mm

1 Scope and field of application

This standard specifies dimensions and technical delivery conditions for studs intended for use mainly in cast iron. As specified in DIN 267-2, the stud end thread shall be produced to tolerance Sk6 as in DIN 13-51, unless the stud is designated Fo ('without interference-fit thread') or Sn4.

2 Dimensions

DIN 78-K type nut end

u (incomplete thread): 1,5 P maximum.

b, = studend b, = nut end

Continued on pages 2 to 5.

Beuth Verlag GrnbH, Berlin, has lhe exclusive right of sale for German Standards (DIN-Normen).

01.96

DIN 939 Engl. Price group 6

Sales No. 0106

Copyright Deutsches Institut Fur Normung E.V.

Provided by IHS under license with DIN Licensee=Deere & Co Categories/9999663103, User=Zhang, Kai Not for Resale, 05/11/2008 19:52:41 MDT

No reproduction or networking permitted without license from IHS

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--`,``,,,,,,``,````````,,,,,,`,-`-`,,`,,`,`,,`---Y4 5 Table 1 : Dimensions M5 M6 (Mi) MB M10 M12 (M14) M16 (M18) M20

_

-

M8x1 M10x1,25 M12x1,25 (M14~1.5) M16x1,5 (MlBx1,5) M 2 0 W

_

-

M12x1,5

-

6,5 7,5 9 10 12 15 18 20 22 25

-

d

14 20 ,75 ),9 (M22) IM24 (M22x1,5) M24x: 16 18 20 22 26 30 34 38 42 46 50 54 22 24 26 28 32 36 40 44 48 52 56 60

-

45 49 53 57 61 65 69 73 2,O 2,5 2,5 3,2 3,8 4,3 5,o 5,o 63 6 3 6,3 7,5

1,0 1,25 1,25 1,6 1,9 292 295 23 32 3 2 3,2 3,8

-

--

!,O3

-

!,23 3,65 !,52 4,11 ?,82 4.57 3,02 4,88

- - -

5,85 6,52 6,96

-

9,49 10,l 11,6 13,l 14,6 13,l 15,l 17,O 19.0 $,O1

-

6.42 9,18 7,19 10,2 242 257 272 287 302 317 332 346 376 406 436 466 496 525 555 585 615 645 305 323 341 358 376 394 412 447 483 518 554 589 625 660 696 731 767 70,O 76,l 82,l 88,2 94,2 1 O0 1 06 112 118 124 130 1 43 155 167 179 ~ 94,9 103 130 1 1 1 1 40 119 150 126 160 1 34 170 142 180 1 50 190 158 199 166 21

o

174 220 190 240 205 260 221 280 237 300 253 320 269 340 360 X1 x2 I I I I I I I I I 1 1 1 1

S15 Approximate mass (7,85 kg/dm3) per 1 O00 units, in kg

12 16 (1 4)

I

&-

27,2 45,4 41

,O

-i---

, - - - 50 55 60

-

180 65 70 75 192 205

21

7 42,6 45,7 67,6 48,8 229 241 254 (95) 1 O0 110 266 279 303 328 353 377 402 427 451 64,2 112 120 130 140 1 50 160 170

T

180 190 200 476 501 525

I F

For I) to

7,

see page 3

(continued)

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(3)

--`,``,,,,,,``,````````,,,,,,`,-`-`,,`,,`,`,,`---DIN939 Page3 1647 1756 1865 1973 2082 21 91 Table 1 (concluded) x2 4,5 5,O 5,O 5 3 5,5 6 3 6 3 1963 2088 2364 2213 2506 3027 2338 2648 31 94 2462 2790 3360 2587 2932 3527 jsl5

I I

2735 2952 31 70 3387 3605 3822 4040 4257 4475 4692 60

55 t----

321 1 3642 4361 3461 3927 4694 371 1 421 1 5028 3961 4495 5361 421 O 4779 5694 4460 5063 6028 471 O 5347 6361 4959 5631 6695 5209 5915 7028 5459 61 99 7362 475 497 520 542 1 O0 110 587 (95) 1672 1784 160 81 2 857 902 190 947 200 992 2052 2449 21 86 2609 2321 2769 2455 2929 3088 220 240 260 280 300 320 340 360 380 400 1082 1172 1262 1352

Approximate mass (7,85 kg/dm3) per 1

O00

units, in kg

785 977 1045 896 1112 952 1179 1007 1246 1062 1313 1490 1570 1118 1380 1650 1173 1229 1340 1649 1970 1450 1562 1326 1420 1514 1607 1701 1795 1889 1982 2076 2170 2358 2545 2733 2920 31 08 3295 3483 3670 3858 4045 I I I 2300 271 2 3074 3694 2408 2837 321 6 3861 251 7

1

2962

1

3358

I

4027

l ) For lengths, 1, of 125 mm or less.

2 , For lengths,

I,

above 125 mrn up to 200 rnm. 3, For lengths, 1, exceeding 200 mm.

Lengths above 400 mm shall be graded in 20 mm steps.

Bracketed sizes and intermediate lengths should be avoided if possible.

The zone between the continuous thick lines indicates the range of commercial sizes of studs with coarse pitch thread.

Studs of sizes above this range cannot be manufactured with a nut end thread length, b,, as specified in the table. In such cases, b, will be approximately equal to 1 - (x,

+

3). For sizes above the dashed line, b,

+

xi will be less than 1,2 b,. The nut end of these studs shall be rounded (¡.e. given a DIN 78-L type end), unless the end is already marked with the property class.

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--`,``,,,,,,``,````````,,,,,,`,-`-`,,`,,`,`,,`---3

Technical

delivery

conditions

Table 2: Technical delivery conditions Material General requirements Thread

I

Tolerance A s specified in Property class (material) I) Mechanical

As

specified in

I

properties

Limit deviations, Product grade geometrical

tolerances As specified in

I

Acceptance inspection

Steel

As specified in IS0 8992.

Stud end: Sk6.

I

Nut end: 6g. DIN 13-51.

1

DIN 13-12 and DIN 13-15.

5.6,8.8 or 10.9 DIN EN 20898-1.

A IS0 4759-1. Property class 5.6: as processed.

Property classes 8.8 and 10.9: (thermally or chemically) blackened. DIN 267-2 shall apply with regard to surface roughness.

DIN EN 26 157-3 shall apply with regard to limits

for

surface discontinuities. IS0 4042 shall apply with regard to electroplating. The limits of thread size shall also apply after coating.

As specified in IS0 3269. ’) Use of other property classes or materials shall be subject to agreement.

4 Designation

Designation of an M12 stud with interference-fit thread as in DIN 13-51, with a nominal length,

I,

of 80 mm, and assigned to property class 8.8:

Stud

DIN

939-Ml2

X

80-8.8

Designation of an M i 2 stud without interference-fit thread (Fo), with a nominal length,

I,

of 80 mm, and assigned to property class 8.8:

Stud

DIN

939-Ml2

FO

X

80-8.8

Where studs are to be supplied with a different thread on either end, this shall be indicated in the designation, with the symbol for the thread of the stud end preceding that for the nut end, e.g.:

DIN 962 shall apply to the designation of type and finish, with additional information to be given on ordering. The DIN 4000-2-4 tabular layout of article characteristics shall apply to studs as covered in this standard.

Stud

DIN

939-Ml2-Ml2

X

1,25

X

80-8.8

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--`,``,,,,,,``,````````,,,,,,`,-`-`,,`,,`,`,,`---DIN939 Page5

Standards referred to

DIN 13-12 DIN 13-15 DIN 13-51 DIN 78 DIN 267-2 DIN 962 DIN 4000-2 DIN EN 20 898-1 DIN EN 26 157-3 IS0 3269 : 1988 IS0 4042 : 1989 IS0 4759-1 : 1978 IS0 8992 : 1986

IS0 metric screw threads; coarse and fine pitch threads with diameters from 1 to 300 mm; selected diameters and pitches

IS0 metric screw threads; fundamental deviations and tolerances for screw threads of 1 mm diameter and larger

IS0 metric screw threads; external threads for transition fits; tolerances, limit deviations and limits of size

Stud ends and lengths of projection of bolt ends for IS0 metric screw threads in accordance with DIN 13

Fasteners; technical delivery conditions; design and dimensional accuracy Bolts, screws, studs and nuts; designation of types and finishes

Tabular layouts of article characteristics for screws and nuts

Mechanical properties of fasteners; bolts, screws and studs (IS0 898-1 : 1988) Fasteners; surface discontinuities; bolts, screws and studs for special requirements Fasteners; acceptance inspection

Threaded components; electroplated coatings

Tolerances for fasteners; bolts, screws and nuts with thread diameters from 1,6 to 150 mm; product grades A, B and

C

Fasteners; general requirements for bolts, screws, studs and nuts (IS0 6157-3 : 1988)

Previous editions

DIN 833: 1943-12, 1952-12; DIN 939: 1972-12. DIN 834: 1943~-12, 1953-03; DIN 939-1 : 1926-01, 1943-12, 1951 -09, 1953-02, 1953-11 ;

Amendments

The following amendments have been made to the December 1972 edition. a) By analogy with IS0 4759-1, the length of the stud end is now designated b,. b) Symbol b has been replaced by b,.

c) By analogy with DIN 78, symbol

z ,

has been replaced by u.

d) By analogy with DIN 76-1, symbol x has been replaced by x,.

e) The stud end shall be provided with a run-out, x2, conforming to DIN 76-1. f) The standard has been editorially revised.