National Item Identification Number

01-083-2299
010832299
5305-01-083-2299
5305010832299

National Stock Number

Item Name

SCREW,CLOSE TOLERANCE

Federal Supply Class

5305

Description

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.

Commercial and Government Entity Code (Supplier Data)

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17446

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26512

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73197

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92215

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56878

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80539

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Reference Numbers (Part Numbers)

BM19045-4A9
BM19045-4A9
GB510N4A9
HT326-4A9
HT8181F4-9
SFH22D4A9
SFH22D4A9

Required Categories

THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR

Required Description

UNJF
0.250 INCHES
28
3A
RIGHT-HAND
0.268 INCHES MINIMUM AND
0.335 INCHES M