1、 WORLDWIDE FASTENER STANDARD WC120 Date: 2008-03-01 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 1 of 1 BOLT - HEXAGON FLANGE HEAD AND CONICAL WASHER, PILOT PC 8.8 - THREAD CLASS 6g CATEGORY 010.020 Washer shall be retained on the bolt after thread rolling but s
2、hall not bind on the bolt shank or the thread before or during tightening of the assembly. Crown height c is determined by measuring h + c and subtracting the actual h value, (tolerance of c is independent of h) a = the distance from the last full form thread to the head bearing surface Nominal Size
3、 M5 M6 M8 M10 Pitch, mm 0.8 1 1.25 1.5 s nom 7 8 10 13 k ref max. 5.6 6.8 8.5 9.7 dc max. 11.4 13.6 17 20.8 d2 max 13.08 14.48 19.43 22.61 min 12.57 14.15 18.87 22.05 h max 1.42 1.8 2.21 2.62 min 1.19 1.5 1.88 2.29 c max 0.43 0.64 0.66 0.61 min 0.28 0.38 0.41 0.36 a max 2.9 3.6 4.2 4.9 L Tolerance F
4、ORD PART NUMBERS 10 +/-0.29 W503250 W503270 12 W503251 W503271 14 +/-0.35 W503252 W503272 16 W503253 W503273 W503290 W503310 18 W503254 W503274 W503291 W503311 20 W503255 W503275 W503292 W503312 22 W503256 W503276 W503293 W503313 25 +/-0.42 W503257 W503277 W503294 W503314 27 W503258 W503278 W503295
5、W503315 30 W503259 W503279 W503296 W503316 35 W503260 W503280 W503297 W503317 40 +/- 0.5 W503261 W503281 W503298 W503318 45 W503262 W503282 W503299 W503319 50 W503263 W503283 W503300 W503320 Threads: ISO 261 and 965 General Specifications: WA 900 for bolt; Type U or F underhead fillet in accordance with WA900 Pilot Lp and dp: WA900 Finish: WX 100 Material and Performance: Bolt - WA950 Property Class 8.8 Washer - Steel, WSD-M1A283-B5 to B37, harden and temper 300 - 390 HV, Hardness test per ISO 6507 HV5 Example Description: W503250 S437 BOLT & WSHR M5 X 10 HEX FLNG PIL 8
