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National Stock Number:
5305-01-186-9289
Federal Supply Class:
5305
National Item Identification Number:
011869289
Description:
SCREW,CLOSE TOLERANCE
Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
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Manufacturer Information:
| HT4031-4-5 | 73197 | HI-SHEAR CORPORATION | | LD111-0047-0405 | 06725 | SPS TECHNOLOGIES, LLC | | LD111-0047-0405 | 17446 | HUCK INTERNATIONAL, INC | | LD111-0047-0405 | 27624 | SPS TECHNOLOGIES LLC | | LD111-0047-0405 | 43999 | THE BOEING COMPANY | | LD111-0047-0405 | 57928 | SONIC INDUSTRIES, INC. | | LD111-0047-0405 | 73197 | HI-SHEAR CORPORATION | | LD111-0047-0405 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.694 INCHES MINIMUM AND 0.724 INCHES MAXIMUM | | GRIP LENGTH | 0.312 INCHES NOMINAL | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | HEAD DIAMETER | 0.397 INCHES NOMINAL | | HEAD HEIGHT | 0.018 INCHES NOMINAL | | HEAD STYLE | FILLISTER COUNTERSUNK | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP XM-13 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | COAT WITH DRY FILM LUBRICANT PER MIL-L-8937 | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD LENGTH | 0.397 INCHES NOMINAL | | THREAD DIRECTION | RIGHT-HAND | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF |
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