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National Stock Number:
5305-01-316-1462
Federal Supply Class:
5305
National Item Identification Number:
013161462
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:
| SS5112-408 | 16258 | SPACE-LOK, INC. | | SS5112-408 | 73197 | HI-SHEAR CORPORATION | | SS5112-408 | 78286 | SIKORSKY AIRCRAFT CORPORATION | | SS5112-408 | 84256 | AVIBANK MFG., INC. | | SS5112-408 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.402 INCHES MINIMUM AND | | 0.438 INCHES MAXIMUM | | FASTENER LENGTH | 0.918 INCHES MINIMUM AND | | 0.938 INCHES MAXIMUM | | MATERIAL | STEEL COMP 440C LOCKING FEATURE | | STEEL COMP XM-13 FASTENER | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE | | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HARDNESS RATING | 58.0 ROCKWELL C MINIMUM AND | | 62.0 ROCKWELL C MAXIMUM LOCKING FEATURE | | HEAD STYLE | CROWNED HEXAGON | | HEAD HEIGHT | 0.126 INCHES MINIMUM AND | | 0.141 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND | | 0.438 INCHES MAXIMUM | | INTERNAL DRIVE STYLE | SLOT | | LOCKING FEATURE | DETENT BALL GRIP | | GRIP LENGTH | 0.500 INCHES MINIMUM AND | | 0.516 INCHES MAXIMUM | | GRIP DIAMETER | 0.2487 INCHES MINIMUM AND | | 0.2492 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.833 INCHES MINIMUM AND | | 0.849 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND | | 0.086 INCHES MAXIMUM FIRST HOLE | | SPECIAL FEATURES | FURNISHED WITH PLUNGER,SPRING AND BALLS; PLUNGER PH13-8MO AMS 5629; SPRING AMS 5678,17-7 OR QQ-W-423,302 CONDITION B; PLUNGER PASSIVATE PER QQ-P-35; SPRING NON-METALLIC ABRASIVE BLAST CLEANING OR PASSIVATE PER QQ-P-35 FOR 302; USED IN CRITICAL APPLICATION | | THE MANUFACTURERS DATA | | | MANUFACTURERS CODE | 78286 | | DESIGN CONTROL REFERENCE | SS5112-408 |
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