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National Stock Number:
5305-01-521-1800
Federal Supply Class:
5305
National Item Identification Number:
015211800
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:
| 7220079-01 | 65589 | MODERN MANUFACTURING & ENGINEERING, INC | | 7220079-01 | 90536 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| FASTENER LENGTH | 0.450 INCHES NOMINAL | | HEAD DIAMETER | 0.595 INCHES MINIMUM AND 0.605 INCHES MAXIMUM | | HEAD HEIGHT | 0.085 INCHES MINIMUM AND 0.093 INCHES MAXIMUM | | HEAD STYLE | FILLISTER | | INTERNAL DRIVE STYLE | TORQUE | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SHOULDER LENGTH | 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | THREAD CLASS | 2A | | THREAD DIRECTION | LEFT-HAND | | THREAD LENGTH | 0.250 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF |
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