5310-01-557-6806 WASHER,FLAT Index 5310-01-556-4492 WASHER,FLAT

National Stock Number:
5310-01-556-4484

Federal Supply Class:
5310

National Item Identification Number:
015564484

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:
1003934561C19MIL-COTS CORPORATION
120375338X5ND DEFENSE LLC
12759-004700Y3H3FASTENAL COMPANY
361010Y3H3FASTENAL COMPANY
ESP-3-1.121-PP 338X5ND DEFENSE LLC
25579R1338X5ND DEFENSE LLC
ESP-E-1.101-GS338X5ND DEFENSE LLC
ESP-E-1.121-PP338X5ND DEFENSE LLC


Techincal Specification:
BEARING SURFACE TYPEFLAT
LUBRICATIONOIL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A563, GRADE A ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
III PART NAME ASSIGNED BY CONTROLLING AGENCYBOLT,HH 1/2NF X 2 PHC TYPE 8
PROPRIETARY CHARACTERISTICSNPAC
NOMINAL THREAD SIZE0.250 INCHES
NUT HEIGHT0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM
NUT STYLEHEXAGON
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH20
THREAD SERIESUNC


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