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National Stock Number:
5305-01-393-0784
Federal Supply Class:
5305
National Item Identification Number:
013930784
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:
| SLB142-3-6 | 16258 | SPACE-LOK, INC. |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.431 INCHES NOMINAL | | FASTENER LENGTH | 0.926 INCHES NOMINAL | | MATERIAL | STEEL COMP 440C LOCKING FEATURE | | STEEL CORROSION RESISTING SPRING | | TITANIUM ALLOY UNS R56400 FASTENER | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE | | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR | | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE FASTENER | | HEAD STYLE | FLAT COUNTERSUNK | | GRIP LENGTH | 0.375 INCHES MINIMUM AND | | 0.385 INCHES MAXIMUM | | GRIP DIAMETER | 0.1865 INCHES MINIMUM AND | | 0.1870 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SPECIAL FEATURES | PLUNGER 0.020 IN. MIN AND 0.250 IN. MAX DISTANCE BELOW TOP OF HEAD |
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