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National Stock Number:
5305-01-272-0775
Federal Supply Class:
5305
National Item Identification Number:
012720775
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:
| HT184-8-19 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT184-8-19 | 56878 | SPS TECHNOLOGIES, LLC | | HT184-8-19 | 73197 | HI-SHEAR CORPORATION | | HT184-8-19 | 80539 | SPS TECHNOLOGIES, LLC | | HT184-8-19 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT184-8-19 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| FASTENER LENGTH | 1.188 INCHES NOMINAL | | GRIP DIAMETER | 0.498 INCHES MINIMUM AND 0.499 INCHES MAXIMUM | | GRIP LENGTH | 1.500 INCHES NOMINAL | | HEAD DIAMETER | 0.711 INCHES MINIMUM AND 0.759 INCHES MAXIMUM | | HEAD HEIGHT | 0.111 INCHES NOMINAL | | HEAD STYLE | FILLISTER | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL | STEEL COMP 4140 OVERALL | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.453 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNC |
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