5305-01-234-2538, SCREW,EXTERNALLY RELIEVED BODY

5305-01-234-2539 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-234-2538

Federal Supply Class:
5305

National Item Identification Number:
012342538

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:

MC17429

76050

EATON AEROSPACE LLC M C AEROSPACE DIV DBA STERER ENGINEERING

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.070 INCHES MINIMUM AND 0.110 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.774 INCHES MINIMUM AND 0.794 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.190 INCHES NOMINAL
HARDNESS RATING	77.7 ROCKWELL SUPERFICIAL 15-N MINIMUM OVERALL AND 81.5 ROCKWELL SUPERFICIAL 15-N MAXIMUM OVERALL
HEAD DIAMETER	0.419 INCHES MINIMUM AND 0.421 INCHES MAXIMUM
HEAD HEIGHT	0.300 INCHES NOMINAL
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 630 OVERALL
POINT STYLE	FULL DOG
PROPRIETARY CHARACTERISTICS	PACS
NOMINAL THREAD DIAMETER	0.250 INCHES
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MC+39 FSCM 76050 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.500 INCHES MINIMUM AND 0.620 INCHES MAXIMUM
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNF

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