|
|
|
National Stock Number:
5305-01-337-3286
Federal Supply Class:
5305
National Item Identification Number:
013373286
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:
| BACB30MS5R21 | 17446 | HUCK INTERNATIONAL, INC | | BACB30MS5R21 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30MS5R21 | 73197 | HI-SHEAR CORPORATION | | BACB30MS5R21 | 80539 | SPS TECHNOLOGIES, LLC | | BACB30MS5R21 | 81205 | THE BOEING COMPANY | | BACB30MS5R21 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30MS5R21 | 97928 | HUCK INTL INC | | BACB30MS5R21 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
|
Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | THREAD QUANTITY PER INCH | 24 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.469 INCHES NOMINAL | | FASTENER LENGTH | 1.766 INCHES MINIMUM AND | | 1.796 INCHES MAXIMUM | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR | | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PHOSPHATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BAC 5861,CAGE81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.586 INCHES MINIMUM AND | | 0.637 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 1.302 INCHES MINIMUM AND | | 1.322 INCHES MAXIMUM | | GRIP DIAMETER | 0.3427 INCHES MINIMUM AND | | 0.3432 INCHES MAXIMUM | | SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | | FEATURES PROVIDED | CETYL ALCOHOL LUBRICANT | | SPECIAL FEATURES | RED DYE OR PAINT ON THREAD END BEFORE LUBRICATION |
|
|