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National Stock Number:
5305-01-539-3995
Federal Supply Class:
5305
National Item Identification Number:
015393995
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:
| 3M927-4L13 | 007R1 | TWIST TITE MFG, INC | | 3M927-4L13 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | HT4069-4-13A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4069-4-13A | 56878 | SPS TECHNOLOGIES, LLC | | HT4069-4-13A | 73197 | HI-SHEAR CORPORATION | | 3M927-4L13 | 76301 | THE BOEING COMPANY | | WC4069-4-13 | 60516 | WEST COAST AEROSPACE, INC. | | HT4069-4-13A | 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 | 0.469 INCHES NOMINAL | | FASTENER LENGTH | 1.281 INCHES NOMINAL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-DTL-83488 TY 2 CLS 3 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | FILLISTER COUNTERSUNK | | HEAD DIAMETER | 0.389 INCHES MINIMUM AND | | 0.394 INCHES MAXIMUM | | HEAD HEIGHT | 0.070 INCHES MINIMUM AND | | 0.074 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.812 INCHES NOMINAL | | GRIP DIAMETER | 0.248 INCHES MINIMUM AND | | 0.249 INCHES MAXIMUM | | SPECIAL FEATURES | LUBRICANT- CETYL ALCOHOL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW-CLOSE TOLERANCE 100 DEG COUNTERSUNK REDUCED HEAD, HI-TORQUE, NON MAGNETIC CRES, IVD ALUMINUM COATED |
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