1、SAE ARP*590B 71 m 8357340 0028688 1 m h-35-17 &liD J AEROSPACE RECOMMENDED PRACTICE iociety of Automotive Engineers, Inc. WO PENNSYLVANIA PLAZA. NEW YORK. N Y 10001 Revised 12-15-71 I SPARK PLUG, AIRCRAFT RECIPROCATING ENGINE . I FIG. 1 SEE ARP 368 FIG. 2 FOR !JRBA SIZE SEE TABIE, CO “A“. FACE IRREG
2、UIARITIES OF THREAD FIANKS FOR TIIREAD DETAIL SEE ARP 368. SUR- SHALL NOT EXWD A ROUGHNESS HEIGHT RATING OF TM SURFACES SHALL PARALLGL WITHIN e015 F.1. BREAK CORNER e010 UAX .25 um IRITH THREAI Ram, .345 WITHCUT THAEAD EL THE Po 1.D. SHAU ES ,450 IUN PfITHOu THREAD RELIEF, . FIG. 4 SECTION nAp ENLAB
3、CB) FIG. 3 SEC?IOI “AA“ ENtARW - )/-PROBLEM- HARD COPI Copyright 1971 by Society of Automotive Engineers, Inc. Printed in U. S.A. PLUG TYPE 1 2 3 4 5 o I 4 - - SHELL TIIREAD SIZE* I HEIGHT “II“ TIIREAD SIZE (COLUMN “B“) 2.4381 2.562 I ,750-20 UNEF 3A 2. xic 2.125 2.439 2.439 2.125 1.562 P - - - - AP
4、PLICABLI FIGURES 8Z NUMBERS 1.283 1.283 1,2 t 4 1,2 u4 4,5&G 4, 5, (i Er 1 1&8 Dlhf ENSIOXS IN INCHES UNLESS OTHER SPECIFIED IIRMIC ALL SIIAW EDGES ,003 to O15 UNLESS OTIIERWISE SPECIFIED TOLERANCES: TWO PLACE DECIMALS f m 02. TIIREE PLACE 5 a 010, ANGLES 5 1/2 DECREE * TlIE AKGULARITY OF THE THREAD FORM WITII THE GASKET SEAT SHALL DE UNIFORM WITHIN a 005 T. I. R. AEAIURED AT A DIAMETER OF ,875 BOR 18 Mbf. .i50 BOR 14 MN ON TIE GASKET SEAT. PREPARED BY SUBCOSUdITTEE E-30B. AIRCRAFT PETON EKINE IGNITIOX, OF SAE COSIMITTEE E-30, IGXRIOX RESEARCH - _ - . - PROBLEM HARD COPY
