NSN 5305-00-021-8771

Part Details | EXTERNALLY RELIEVED BODY SCREW

5305-00-021-8771 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.

Alternate Parts: 100493124, 10049312-4, 5305-00-021-8771, 00-021-8771, 5305000218771, 000218771

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53JAN 01, 196100-021-877101852 ( SCREW, EXTERNALLY RELIEVED BODY )
REFERENCE DRAWINGS & PICTURES

DISHED HEXAGON

CROSS RECESS TYPE 1

Cross Reference | NSN 5305-00-021-8771
Part Number Cage Code Manufacturer
10049312-418876U S ARMY AVIATION AND MISSILECOMMAND
Technical Data | NSN 5305-00-021-8771
Characteristic Specifications
THREAD SERIES DESIGNATOR UNC
NOMINAL THREAD DIAMETER0.164 INCHES
THREAD QUANTITY PER INCH32
THREAD CLASS2A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.313 INCHES MINIMUM
FASTENER LENGTH0.750 INCHES NOMINAL
HEAD STYLE3 DISHED HEXAGON
HEAD DIAMETER0.322 INCHES NOMINAL
HEAD HEIGHT0.096 INCHES NOMINAL
INTERNAL DRIVE STYLE4 CROSS RECESS TYPE 1
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
FIRST DIAMETER FROM HEAD0.115 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.437 INCHES NOMINAL