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National Stock Number:
5305-01-391-7852
Federal Supply Class:
5305
National Item Identification Number:
013917852
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:
| 03A416-4-15L | 1W025 | NORTHROP GRUMMAN SYSTEMS CORP | | 125301-4-15L | 80539 | SPS TECHNOLOGIES, LLC | | PBF1571-4-15L | 27624 | SPS TECHNOLOGIES LLC | | HR258-4-15L | 73197 | HI-SHEAR CORPORATION | | HR258-4-15L | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 129.0 DEGREES MINIMUM AND 131.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.341 INCHES NOMINAL | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.938 INCHES NOMINAL | | HEAD DIAMETER | 0.503 INCHES MINIMUM AND 0.511 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL | COBALT COMP MP-35-N OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | DRY ILM LUBRICANT THREADS ONLY | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE THREADS | | SURFACE TREATMENT | PASSIVATE THREADS | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.403 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 28 |
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