5310-00-543-5978 WASHER,FLAT Index 5325-00-543-5982 INSERT,SCREW THREAD

National Stock Number:
5310-00-543-5979

Federal Supply Class:
5310

National Item Identification Number:
005435979

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:
907192018876U S ARMY AVIATION AND MISSILE COMMAND


Techincal Specification:
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY 360 OVERALL
NOMINAL THREAD SIZE0.250 INCHES
NUT HEIGHT0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM
NUT STYLEHEXAGON
WIDTH ACROSS FLATS0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM
SURFACE TREATMENTCADMIUM OR NICKEL OVERALL
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH28
THREAD SERIESUNF


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