NSN 5305-00-021-2578

Part Details | SHOULDER SCREW

5305-00-021-2578 An externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 IN.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below No. 10 (0.190 IN.) (5 mm) nominal diameter. No. 10 (0.190 IN.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use SCREW, EXTERNALLY RELIEVED BODY. For items with a No. 10 (0.190 IN.) (5 mm) or larger thread diameter without an inserted driver head, use BOLT, SHOULDER. Excludes BOLT, INTERNAL WRENCHING and SCREW, CAP, SOCKET HEAD.

Alternate Parts: 106B5740P1, 106B5740P0001, 5305-00-021-2578, 00-021-2578, 5305000212578, 000212578

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53APR 19, 196800-021-257822846 ( SCREW, SHOULDER )
REFERENCE DRAWINGS & PICTURES

CROWNED HEXAGON

CROSS RECESS TYPE 1

Cross Reference | NSN 5305-00-021-2578
Part Number Cage Code Manufacturer
106B5740P199971LOCKHEED MARTIN CORPNAVAL ELECTRONICS & SURVEILLANCE
106B5740P000199971LOCKHEED MARTIN CORPNAVAL ELECTRONICS & SURVEILLANCE
Technical Data | NSN 5305-00-021-2578
Characteristic Specifications
THREAD SERIES DESIGNATOR UNC
NOMINAL THREAD DIAMETER0.138 INCHES
THREAD QUANTITY PER INCH32
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.330 INCHES NOMINAL
FASTENER LENGTH6.260 INCHES NOMINAL
HEAD STYLE9 CROWNED HEXAGON
HEAD DIAMETER0.250 INCHES NOMINAL
HEAD HEIGHT0.300 INCHES NOMINAL
INTERNAL DRIVE STYLE4 CROSS RECESS TYPE 1
SPECIAL FEATURES3RD SHOULDER 0.172 IN. DIA BY 0.250 IN. LG,4TH SHOULDER 0.116 IN. DIA 0.029 IN. LG,5TH SHOULDER 0.187 IN. DIA BY 0.041 IN. LG