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National Stock Number:
5305-01-256-6812
Federal Supply Class:
5305
National Item Identification Number:
012566812
Description:
SCREW,CAP,SOCKET HEAD
Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.
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Manufacturer Information:
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNEF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.290 INCHES MINIMUM | | FASTENER LENGTH | 0.480 INCHES MINIMUM AND | | 0.490 INCHES MAXIMUM | | MATERIAL | STEEL COMP 8620 OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.427 INCHES MINIMUM AND | | 0.432 INCHES MAXIMUM | | COUNTERSINK ANGLE | 59.7 DEGREES MINIMUM AND | | 60.3 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HEXAGON | | WIDTH ACROSS FLATS | 0.1542 INCHES MINIMUM AND | | 0.1582 INCHES MAXIMUM | | LOCKING FEATURE | PATCH THREADS | | SURFACE FINISH | 50.0 MICROINCHES GRIP |
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