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National Stock Number:
5305-01-264-5892
Federal Supply Class:
5305
National Item Identification Number:
012645892
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:
| 4446 | 00141 | ROLLER BEARING CO OF AMERICA, INC |
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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 | 0.438 INCHES NOMINAL | | FASTENER LENGTH | 1.064 INCHES MINIMUM AND | | 1.066 INCHES MAXIMUM | | MATERIAL | STEEL COMP 303 OVERALL | | HEAD STYLE | FLAT CHAMFER | | HEAD DIAMETER | 0.250 INCHES NOMINAL | | HEAD HEIGHT | 0.219 INCHES NOMINAL | | CHAMFER ANGLE | 48.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HEXAGON | | WIDTH ACROSS FLATS | 0.156 INCHES NOMINAL | | SHOULDER SHAPE | ROUND GRIP | | SHOULDER DIAMETER | 0.374 INCHES MINIMUM AND | | 0.375 INCHES MAXIMUM GRIP | | SHOULDER LENGTH | 0.219 INCHES NOMINAL GRIP |
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