4210-01-493-5389 PANT,FIREMANS,BDU Index 9905-01-493-5391 PLATE,IDENTIFICATION

National Stock Number:
5310-01-493-5390

Federal Supply Class:
5310

National Item Identification Number:
014935390

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:
N220N04CADNN56302BCG180204AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED


Techincal Specification:
BEARING SURFACE TYPECHAMFERED
MATERIALSTEEL OVERALL
NOMINAL THREAD SIZE0.250 INCHES
NUT HEIGHT0.160 INCHES MINIMUM AND 0.163 INCHES MAXIMUM
NUT STYLEHEXAGON
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM,B633,TYII,SC3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTZINC AND CHROMATE OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2B
THREAD SERIESUNC
THREAD QUANTITY PER INCH20


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