4540-01-178-5679 HEATING ELEMENT,ELECTRICAL,NONIMMERSION TYPE Index 5310-01-178-5681 NUT,SELF-LOCKING,PLATE

National Stock Number:
5310-01-178-5680

Federal Supply Class:
5310

National Item Identification Number:
011785680

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:
13202586-118876U S ARMY AVIATION AND MISSILE COMMAND


Techincal Specification:
BEARING SURFACE TYPECHAMFERED
COUNTERSINK ANGLE45.0 DEGREES NOMINAL FIRST END
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
NOMINAL THREAD SIZE0.750 INCHES
NUT STYLEHEXAGON
NUT HEIGHT2.080 INCHES MINIMUM AND 3.050 INCHES MAXIMUM
WIDTH ACROSS FLATS23.81 MILLIMETERS NOMINAL
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3B
THREAD SERIESUNEF
THREAD QUANTITY PER INCH20


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