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National Stock Number:
5305-00-057-4520
Federal Supply Class:
5305
National Item Identification Number:
000574520
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:
| AS104-04-11 | 84256 | AVIBANK MFG., INC. | | CA2730-4-11 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | CC00035-4-11 | 81755 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.270 INCHES MINIMUM AND | | 0.290 INCHES MAXIMUM | | FASTENER LENGTH | 1.146 INCHES NOMINAL | | MATERIAL | STEEL OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HEAD STYLE | FLAT CHAMFER | | HEAD DIAMETER | 0.3742 INCHES MINIMUM AND | | 0.3747 INCHES MAXIMUM | | HEAD HEIGHT | 0.253 INCHES MINIMUM AND | | 0.273 INCHES MAXIMUM | | INTERNAL DRIVE STYLE | HEXAGON | | WIDTH ACROSS FLATS | 0.1875 INCHES MINIMUM AND | | 0.1900 INCHES MAXIMUM | | LOCKING FEATURE | PELLET GRIP | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.037 INCHES NOMINAL FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND | | 0.086 INCHES MAXIMUM FIRST HOLE | | THE MANUFACTURERS DATA | | | MANUFACTURERS CODE | 84256 | | DESIGN CONTROL REFERENCE | AS104-04-11 |
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