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National Stock Number:
5305-01-241-5080
Federal Supply Class:
5305
National Item Identification Number:
012415080
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:
| 11883-4L-18 | 59563 | REID PRODUCTS INC. | | 3M926-4L-18 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3M926-4L18 | 007R1 | TWIST TITE MFG, INC | | HT-4068-4-18A | 17446 | HUCK INTERNATIONAL, INC | | 3M926-4L18 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | 3M926-4L-18 | 76301 | THE BOEING COMPANY | | HT-4068-4-18A | 56878 | SPS TECHNOLOGIES, LLC | | WC4068-4-18 | 60516 | WEST COAST AEROSPACE, INC. | | HT-4068-4-18A | 73197 | HI-SHEAR CORPORATION | | HT-4068-4-18A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT-4068-4-18A | 97928 | HUCK INTL INC | | HT-4068-4-18A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.444 INCHES MINIMUM AND | | 0.494 INCHES MAXIMUM | | FASTENER LENGTH | 1.579 INCHES MINIMUM AND | | 1.609 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-83488 TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | OVAL COUNTERSUNK | | HEAD DIAMETER | 0.389 INCHES MINIMUM AND | | 0.394 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 1.115 INCHES MINIMUM AND | | 1.135 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM |
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