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National Stock Number:
5305-01-118-9593
Federal Supply Class:
5305
National Item Identification Number:
011189593
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:
| CA21070-4-8HS | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | GS520CK4-08 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | GS520CK4-08 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | GS520CK4-08 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. |
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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 | 0.477 INCHES MINIMUM AND | | 0.636 INCHES MAXIMUM | | FASTENER LENGTH | 1.187 INCHES MINIMUM AND | | 1.207 INCHES MAXIMUM | | MATERIAL | STEEL COMP 4140 OR | | STEEL COMP 8740 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR | | MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.394 INCHES MINIMUM AND | | 0.404 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HEXAGON | | WIDTH ACROSS FLATS | 0.1409 INCHES MINIMUM AND | | 0.1426 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SPECIAL FEATURES | THREADS TO BE DOUBLE LEAD |
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