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National Stock Number:
5305-00-437-2178
Federal Supply Class:
5305
National Item Identification Number:
004372178
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:
| 147314 | 98897 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.246 INCHES MINIMUM AND | | 0.256 INCHES MAXIMUM | | FASTENER LENGTH | 0.550 INCHES NOMINAL | | MATERIAL | STEEL COMP 8630 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT CHAMFER | | HEAD DIAMETER | 0.438 INCHES NOMINAL | | HEAD HEIGHT | 0.063 INCHES NOMINAL | | INTERNAL DRIVE STYLE | SLOT | | SHOULDER SHAPE | ROUND FIRST SHOULDER | | SHOULDER DIAMETER | 0.3112 INCHES MINIMUM AND | | 0.3117 INCHES MAXIMUM FIRST SHOULDER | | SHOULDER LENGTH | 0.164 INCHES MINIMUM AND | | 0.174 INCHES MAXIMUM FIRST SHOULDER |
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