5310-01-468-1686 WASHER,FLAT Index 5320-01-468-1688 RIVET,SOLID

National Stock Number:
5305-01-468-1687

Federal Supply Class:
5305

National Item Identification Number:
014681687

Description:
SCREW,EXTERNALLY RELIEVED BODY

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.


Manufacturer Information:
A3168136-280063US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR


Techincal Specification:
COUNTERSINK ANGLE91.0 DEGREES NOMINAL
EXTERNAL THREAD TOLERANCE CLASS6G
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY2
FASTENER LENGTH2.5 MILLIMETERS MINIMUM AND 3.5 MILLIMETERS MAXIMUM
HEAD DIAMETER5.5 MILLIMETERS MINIMUM AND 5.8 MILLIMETERS MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLECROSS RECESS TYPE II
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5737,TYPEA-236 ASSN STD 1ST MATERIAL RESPONSE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER3.0 MILLIMETERS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-13924,CLASS4 FED SPEC 1ST TREATMENT RESPONSE OVERALL
SURFACE TREATMENTOXIDE OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH2.5 MILLIMETERS MINIMUM AND 3.5 MILLIMETERS MAXIMUM
THREAD PITCH IN MILLIMETERS0.5
THREAD SERIES DESIGNATORM


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