5340-00-448-8137 STANDOFF,THREADED,SPACING Index 5305-00-448-8140 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-448-8138

Federal Supply Class:
5305

National Item Identification Number:
004488138

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:
158447605869RAYTHEON COMPANY


Techincal Specification:
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER1.656 INCHES MINIMUM AND 1.750 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
FASTENER LENGTH2.656 INCHES MINIMUM AND 2.750 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD0.296 INCHES MINIMUM AND 0.316 INCHES MAXIMUM
HARDNESS RATING80.0 ROCKWELL B MINIMUM OVERALL
HEAD HEIGHT0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM
HEAD STYLEHEXAGON
INTERNAL DRIVE STYLESLOT
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIALSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL
MINIMUM YIELD STRENGTH30000 POUNDS PER SQUARE INCH
MINIMUM TENSILE STRENGTH80000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.375 INCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.000 INCHES MINIMUM
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH16
WIDTH BETWEEN FLATS0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM


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