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 Organi
2、zation 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 thr
3、ead 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 exclusi
4、ve right of sale for German Standards (DIN-Normen). 01.96 DIN 939 Engl. Price group 6 Sales No. 0106 Page2 DIN 939 Y4 5 Table 1 : Dimensions M5 M6 (Mi) MB M10 M12 (M14) M16 (M18) M20 _- M8x1 M10x1,25 M12x1,25 (M141.5) M16x1,5 (MlBx1,5) M20W _- - - M12x1,5 - - - - 6,5 7,5 9 10 12 15 18 20 22 25 - d 1
5、4 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 63 6,3 7,5 1,0 1,25 1,25 1,6 1,9 292 295 23 32 32 3,2 3,8 - - !,O3 - !,23 3,65 !,52 4,11 ?,82 4.57 3,02 4,88 - 5,85 6,52 6,96 -
6、 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 94,9 103 130 111 1
7、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 coarse and fine pitch threads with diameters from 1 to 300 mm; selected di
8、ameters 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 m
9、etric 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 an
10、d 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; prod- uct grades A,
11、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
12、 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.
