din-985-gajki参考标准资料

UDC621.882.31:621.882.55May 1987Prevailing torque type hexagon thin nuts瓜with nonmetallic insert985Sechskantmuttern mit Klemmteil;Supersedes September 1977 edition.mit nichtmetallischem Einsatz,niedrige FormIn keeping with current practice in standards published by the International Organization for Standardization (ISO),a comma has been used throughout as the decimal marker.Dimensions in mm1 Field of applicationThis standard specifies requirements for M 3 to M 48 prevailing torque type hexagonnuts with nonmetallic insert,assigned to product grade A for sizes up to M 16 andproduct grade B for sizes over M 16.If,in special cases,nuts are to comply with specifications other than those given in thisstandard,e.g.regarding materials other than those specified in DIN 267 Part 15,performance at temperatures above +120C,or corrosion resistance,this shall be agreedat the time of ordering (cf.DIN 267 Part 15).Note.The proof load values specified in DIN 267 Part 4,which are lower than thosespecified in DIN 267 Part 15 and result in a correspondingly lower resistance tostripping (reduced locking action),apply for nuts covered in the present standard.DIN 267 Part 15 shall,however,apply for the proof clamp loads and theprevailing torques.These nuts are not suitable for yield point tightening methods.2 DimensionsPrevailing torqueelement (designat the manufacturer's 45 to 30discretion):0250a0am'=minimum wrenching height.Continued on pages 2 to 4144