5305-01-512-8123, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-512-8123

Federal Supply Class:
5305

National Item Identification Number:
015128123

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:

375-SS-20

55566

MATTHEW WARREN, INC

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.662 INCHES MINIMUM AND 0.682 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.860 INCHES MINIMUM AND 0.890 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	2
FASTENER LENGTH	0.860 INCHES MINIMUM AND 0.890 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.073 INCHES MINIMUM AND 0.083 INCHES MAXIMUM
HEAD DIAMETER	0.250 INCHES MINIMUM AND 0.265 INCHES MAXIMUM
HEAD HEIGHT	0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
HEAD STYLE	KNURLED NO. 1
INTERNAL DRIVE STYLE	SLOT
MATERIAL	STEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER	0.112 INCHES
SPECIAL FEATURES	ALL CHAMFERED ARE AT 45 DEGREE, EXCEPT TIP END AT 90 DEGREE + - 5 DEGREE
PART NAME ASSIGNED BY CONTROLLING AGENCY	SCREW, EXTRENALLY RELIEVED BODY
SECOND DIAMETER FROM HEAD	0.068 INCHES MINIMUM AND 0.078 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.110 INCHES MINIMUM AND 0.125 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH	40

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