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National Stock Number:
5305-00-272-1897
Federal Supply Class:
5305
National Item Identification Number:
002721897
Description:
SCREW,SHOULDER
Detail:
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.
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Manufacturer Information:
| TP591 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.269 INCHES MINIMUM | | FASTENER LENGTH | 0.594 INCHES NOMINAL | | MATERIAL | COPPER ALLOY 482 OR | | COPPER ALLOY 485 OVERALL | | HEAD STYLE | FLAT CHAMFER | | HEAD DIAMETER | 0.490 INCHES MINIMUM AND | | 0.510 INCHES MAXIMUM | | HEAD HEIGHT | 0.188 INCHES NOMINAL | | INTERNAL DRIVE STYLE | SLOT | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.310 INCHES MINIMUM AND | | 0.312 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 0.250 INCHES MINIMUM AND | | 0.255 INCHES MAXIMUM FIRST SHOULDER | | SPECIAL FEATURES | GROOVE 0.172 TO 0.182 IN. DIA BY 0.065 TO 0.085 IN. W BETWEEN SHOULDER AND THREAD |
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