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National Stock Number:
5305-01-325-1974
Federal Supply Class:
5305
National Item Identification Number:
013251974
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:
| 5/16-18UNC-3A X 2.000 IN LG | 80204 | AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED | | FP-S-86 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
| FASTENER LENGTH | 2.000 INCHES NOMINAL | | HEAD DIAMETER | 0.457 INCHES MINIMUM AND 0.469 INCHES MAXIMUM | | HEAD HEIGHT | 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-286 CLA FED SPEC SINGLE MATERIAL RESPONSE FASTENER | | MATERIAL | NICKEL ALLOY K-500 FASTENER | | MATERIAL | PLASTIC POLYAMIDE NYLON LOCKING FEATURE | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | NONDEFINITIVE SPEC/STD DATA | 6 TYPE | | SPECIAL FEATURES | FURNISHED WITH SELF-LOCKING OPTIONAL TYPE ELEMENT ON THREADS | | WIDTH ACROSS FLATS | 0.250 INCHES NOMINAL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.889 INCHES MINIMUM AND 2.000 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 18 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
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