1、DEUTSCHE NORMEN November 1972 UDC 621.753.3 : 621.882.082 : 621.15.671-0.14 m Steel Conduit Thread Thread Gauges “Go“ and “Not go“ Thread Plug Gauges DIN 40431 Sheet 2 Stahlpanzerrohr-Gewinde; Gewindelehren, Gewinde-Gutlehrdorne und AusschuBlehrdorne Prepared by VDE/FNE Joint Committee 0610-7/205.7
2、Dimensions in mm w(m Jowl Thread pluu uauaes for PIZ 7 to Pa 21 thread gauge element tIGo*V / see on page 2 “Not go“ gauge element Type 2 acc. to DIN 2249 Sheet 1 Thread plug uauaes for PIZ 29 and Pa 36 “Go“ thread gauge element Cheese head screw see on page 2 Other dimen- sions and details as for t
3、hread plug gauges for Pg 7 to Pg 21 Thread Pluu RauRes for Pu 42 and PK 48: “Go“ thread plug gauges “Go“ thread gauge element see on page 2 / /l*-DL204 I “Not go“ plug gauges according to DIN 2247 Sheet 3 Gauge thread1 ) : Outside diameter Effective diameter Minor diameter O, = (. +!) f /-hd Cheese
4、head screv acc. to DIN 2240 Sheet 2 Designation of a thread plug gauge for steel conduit thread Pg 21: Designation of a “Go“ thread plug gauge for steel conduit thread Pg 48: Plug gauge Pg 21 DM 40431 “Go“ plug gauge Pg 48 DIN 40431 1 D, DI and D2 are nominal dimensions according to DIN 40430 2) See
5、 on page 2 Continued on pages 2 and 3 einverkauf der Normbltter durch Beuth Verlag GmbH, Berlin 30 und Kln DIN 40431 B1. 2 engl. Preisgr. Page 2 DIN 40431 Sheet 2 “Go“ thread RauRe element C Thread profile “Go“ thread Rauue element for PR 7 to Pa 21 Gauge thread : Outside diameter Effective diameter
6、 Minor diameter H H DI, = (D, + : 29 and Pu 36 Other dimensions as for Pg 29 and Pg 36 Designation of a “GO“ thread gauge element (C) for steel conduit thread Pg 21: “Go“ gauge element C Pg 21 DIN 40431 zgte&ig&: Gauge steel, grade at manufacturers choice Finih: Gauging surfaces hardened, taper may
7、be left soft, corners of gauging surfaces are broken. Sharp edges occurring at the thread runouts are removed. Dirt grooves according to Dm 2278 for “GO“ thread gauge elements are to be agreed when ordering. Inscription and marking: “GO“ thread gauge elements: e.g. Pg 21 “Go“, manufacturer or manufa
8、c- -_- - turers symbol “Not go“ gauge elements and thread plug gauge: according to DIN 2259 Sheet I Usinn the uaugesi The “GO“ thread plug gauge must be capable of being screwed by hand, without the application of undue force, into the full length of the workpiece thread. The “Not go“ plug gauge mus
9、t be incapable of being introduced. D, Di and D2 are nominal dimensions according to DIN 4049 In view of the work which has started on an IS0 Recommendation concerning the attachment of removable gauge elements to the gauge handle, alternative handle attachment methods are permitted at the manufac-
10、turers choice, pending appearance of the appropriate IC0 Recommendation. The torque for tightening the screw6 shall not exceed 10 N m (1 kp m). The manufacturing tolerance for P applies to any number of threads within the plug gauge length 12. If full advantage ie taken of the manufacturing tolerance down to -0.02, no margin for permissible wear remains. For ring gauges see DIN 4W31 Sheet I For gauges and measuring instruments, technical conditions of delivery, see DIN 2239 DIN 40431 Sheet 2 Page 3 2 c U =u 9 c h U c 3 c -0 0-0 + a- - N & P4 U o m n 7 n r o) rl H a
