|
|
|
National Stock Number:
5305-00-775-8817
Federal Supply Class:
5305
National Item Identification Number:
007758817
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.
|
Manufacturer Information:
| CA2730-5-16 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | CC00035-5-16 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | CC00035-5-16 | 81755 | LOCKHEED MARTIN CORPORATION | | CC00035-5-16 | 84256 | AVIBANK MFG., INC. |
|
Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.374 INCHES MINIMUM AND 1.414 INCHES MAXIMUM FIRST HOLE | | FASTENER LENGTH | 1.520 INCHES MINIMUM AND 1.560 INCHES MAXIMUM | | GRIP DIAMETER | 0.3112 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM | | GRIP LENGTH | 1.000 INCHES MINIMUM AND 1.020 INCHES MAXIMUM | | HEAD DIAMETER | 0.4362 INCHES MINIMUM AND 0.4367 INCHES MAXIMUM | | HEAD HEIGHT | 0.253 INCHES MINIMUM AND 0.273 INCHES MAXIMUM | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | HEXAGON | | MATERIAL | STEEL COMP 8640 OVERALL | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE | | SPECIAL FEATURES | RETAINING ELEMENT IN SHANK | | WIDTH ACROSS FLATS | 0.2187 INCHES MINIMUM AND 0.2217 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.312 INCHES MINIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 24 |
|
|