5310-01-212-5688 NUT,PLAIN,HEXAGON Index 4730-01-212-5690 NUT,TUBE COUPLING

National Stock Number:
5310-01-212-5689

Federal Supply Class:
5310

National Item Identification Number:
012125689

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:
1.375-008UN-2B LEVEL 103950NAVAL INVENTORY CONTROL POINT MECHANICSBURG
688-1864 APPX 196169ELECTRIC BOAT CORPORATION


Techincal Specification:
BEARING SURFACE TYPEWASHER FACED
CRITICALITY CODE JUSTIFICATIONZZZY
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
MATERIALSTEEL OVERALL
NOMINAL THREAD SIZE1.375 INCHES
NUT STYLEHEXAGON
NUT HEIGHT1.310 INCHES MINIMUM AND 1.378 INCHES MAXIMUM
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
SPECIAL FEATURESFOR ADDITIONAL DESCRIPTION AND INFORMATION CONCERNING THIS ITEM,REFER TO SPCCINST 4440.376 SERIES,CHAPTER 9
WIDTH ACROSS FLATS2.119 INCHES MINIMUM AND 2.188 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-16232 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPHOSPHATE OVERALL
THREAD CLASS2B
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH8
THREAD SERIESUN


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