BS 1981:1991 - Specification for unified machine screws and machine screw nuts

BS 1981:1991

Specification for unified machine screws and machine screw nuts

Status : Confirmed, Current   Published : August 1991



Applicable to machine screws and machine screw nuts having ISO inch screw threads and hexagon head and slotted or recessed heads with type Z and type V recess. Mechanical properties are specified for steel, brass and aluminium alloy screws and nuts.

Standard NumberBS 1981:1991
TitleSpecification for unified machine screws and machine screw nuts
StatusConfirmed, Current
Publication Date30 August 1991
Confirm Date01 July 2017
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
ReplacesBS 1981:1972
Amended ByAMD 7485
DescriptorsUnified screw threads, Dimensions, Slotted-head fasteners, Aluminium alloys, Brass, Tensile strength, Radius, Pan-head fasteners, Fasteners, Screws (bolts), Nuts, Dimensional tolerances, Raised-head fasteners, Threaded fasteners, Hexagonal-head fasteners, ISO metric threads, Steels, Recessed-head fasteners, Diameter, Cheese-head fasteners, Length, Square-head fasteners, Countersunk fasteners
Title in FrenchSpecification de vis et ecrous machine Unified
Title in GermanLieferbedingung fuer U-Maschinenschrauben and Maschinenschraubmuttern
ISBN0 580 19530 9
File Size2.918 MB

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