NSN 5305-01-181-2490

Part Details | SHOULDER SCREW

5305-01-181-2490 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: NICUMS5197522, NICU-MS51975-22, 5562235 PIECE 259, 5305-01-181-2490, 01-181-2490, 5305011812490, 011812490

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53JUN 08, 198401-181-249022846 ( SCREW, SHOULDER )
REFERENCE DRAWINGS & PICTURES

CROWNED HEXAGON

HEXAGON

Cross Reference | NSN 5305-01-181-2490
Part Number Cage Code Manufacturer
NICU-MS51975-2270318ALLMETAL SCREW PRODUCTS CORP.DBA ALL METAL SCREW PRODUCTS
5562235 PIECE 25953711NAVAL SEA SYSTEMS COMMAND
Technical Data | NSN 5305-01-181-2490
Characteristic Specifications
THREAD SERIES DESIGNATOR UNC
NOMINAL THREAD DIAMETER0.312 INCHES
THREAD QUANTITY PER INCH18
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.480 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
FASTENER LENGTH2.235 INCHES MINIMUM AND 2.255 INCHES MAXIMUM
HEAD STYLE9 CROWNED HEXAGON
HEAD DIAMETER0.543 INCHES MINIMUM AND 0.562 INCHES MAXIMUM
HEAD HEIGHT0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
INTERNAL DRIVE STYLE HEXAGON
WIDTH ACROSS FLATS0.188 INCHES NOMINAL
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT