1、 WORLDWIDE FASTENER STANDARD WC121 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) Nominal Size, mm M6 M8 M10 Pitch, mm 1 1.25 1.5 s nom 8 10 13 k ref max 6.8 8.5 9.7 dc m
3、ax. 13.6 17 20.8 b ref 50 50 50 d2 max 14.48 19.43 22.61 min 14.15 18.87 22.05 h max 1.8 2.21 2.62 min 1.5 1.88 2.29 c max 0.64 0.66 0.61 min 0.38 0.41 0.36 L Tolerance FORD PART NUMBERS 55 W503284 W503301 W503321 60 W503285 W503302 W503322 65 +/-0.6 W503303 W503323 70 W503304 W503324 75 W503305 W50
4、3325 80 W503306 W503326 85 W503327 90 W503328 95 +/-0.70 W503329 100 W503330 Threads: ISO 261 and 965 General Specifications: WA 900 for bolt; Type U or F underhead fillet in accordance with WA900 Pilot Lp & 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: W503284 S437 BOLT & WSHR M6 X 55 HEX FLNG PIL 8
