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National Stock Number:
5305-01-536-3287
Federal Supply Class:
5305
National Item Identification Number:
015363287
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:
| BACB30NN4K15 | 81205 | THE BOEING COMPANY | | BACB30NN4K15 | Z03F0 | BOEING DEFENCE AUSTRALIA LTD | | BACB30NN4K15 | Z8T75 | BOEING DEFENCE AUSTRALIA LTD |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.347 INCHES MINIMUM AND 1.377 INCHES MAXIMUM | | GRIP DIAMETER | 0.248 INCHES NOMINAL | | GRIP LENGTH | 0.936 INCHES MINIMUM AND 0.938 INCHES MAXIMUM | | HEAD DIAMETER | 0.465 INCHES NOMINAL | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4928 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL OR AMS 4967 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | TITANIUM ALLOY OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | THREAD END TO BE IDENTIFIED WITH BLACK PAINT OR DYE | | SPECIFICATION/STANDARD DATA | 81205 - BACB30NN MANUFACTURERS STANDARD | | SURFACE TREATMENT | ALUMINUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF |
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