5305-99-371-1061 SETSCREW Index 5330-99-371-1089 SEAL,PLAIN ENCASED

National Stock Number:
5310-99-371-1087

Federal Supply Class:
5310

National Item Identification Number:
993711087

Description:
NUT,PLAIN,HEXAGON

Detail:
A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see LOCKNUT, ELECTRICAL CONDUIT. See also LOCKNUT, TUBE FITTING. For items having a thickness (or height) exceeding two times the width across the flats, use POST, ELECTRICAL-MECHANICAL EQUIPMENT. (When height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)


Manufacturer Information:
BS3692K7766BRITISH STANDARDS INSTITUTION
S3S18245000-91K0378ROLLS-ROYCE PLC


Techincal Specification:
BEARING SURFACE TYPECHAMFERED
COUNTERSINK ANGLE110.0 DEGREES MINIMUM AND 130.0 DEGREES MAXIMUM FIRST END
HARDNESS RATING302.0 BRINELL STANDARD MAXIMUM
MATERIALSTEEL OVERALL
NOMINAL THREAD SIZE12.00 MILLIMETERS
NUT HEIGHT6.64 MILLIMETERS MINIMUM AND 7.00 MILLIMETERS MAXIMUM
NUT STYLEHEXAGON
SPECIAL FEATURESSTRENGTH GRADE DESIGNATION 4
WIDTH ACROSS FLATS18.67 MILLIMETERS MINIMUM AND 19.00 MILLIMETERS MAXIMUM
THREAD DIRECTIONLEFT-HAND
THREAD PITCH IN MILLIMETERS1.75
THREAD TOLERANCE CLASS6H INTERNAL
THREAD SERIESISO M


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