edited_DIN-7980_orig技术规格参考

UDC621.882.54:621.882.215.1October 1987Spring lock washers with square ends瓜for cheese head screws7980Federringe fur ZylinderschraubenSupersedes December 1972 edition.In keeping with current practice in standards published by thas been used throughout as the decimal marker.It is intended to withdraw this standard by 1 January 1992,since the spring lock washersit specifies are not suitable for use with cheese head screws now generally manufacturedin property classes 8.8 to 12.9.Dimensions in mm1 Scope and field of applicationSpring lock washers with square ends covered in this standard are deemed to be springwashers designed for use for bolt/nut assemblies involving bolts of property classes lessthan 8.8 as specified in ISO 898 Part 1.They are intended to counteract the effect ofsetting which results in bolt/nut assemblies working loose (see DIN 267 Part 26).Theydo not effectively prevent loosening of the assembly under varying radial load and aredesigned for use with short bolts predominantly subject to thrust.2 DimensionsWasher cross section(enlarged)The illustration shows a spring lock washer with square ends for cheese head screws withright-hand thread,the position of the square ends being vice versa for cheese head screwswith left-hand thread.Continued on pages 2 and 3山aM6 a rpoBephaa325