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National Stock Number:
5305-01-626-8203
Federal Supply Class:
5305
National Item Identification Number:
016268203
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:
| 3M927-5L19 | 76301 | THE BOEING COMPANY | | HT4069-5-19A | 56878 | SPS TECHNOLOGIES, LLC | | WC4069-5-19A | 60516 | WEST COAST AEROSPACE, INC. | | HT4069-5-19A | 73197 | HI-SHEAR CORPORATION | | HT4069-5-19A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.3125 INCHES | | THREAD QUANTITY PER INCH | 24 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.531 INCHES NOMINAL | | FASTENER LENGTH | 1.719 INCHES NOMINAL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-DTL-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.429 INCHES NOMINAL | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | RECESSED TYPE I | | GRIP LENGTH | 1.188 INCHES NOMINAL | | GRIP DIAMETER | 0.3110 INCHES MINIMUM AND | | 0.3120 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.595 INCHES MINIMUM AND | | 1.605 INCHES MAXIMUM OVERALL | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND | | 0.081 INCHES MAXIMUM OVERALL | | FEATURES PROVIDED | CETYL ALCOHOL LUBRICANT | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW-CLOSE TOLERANCE, 100 DEG C'SUNK, REDUCED HEAD, HIGH TORQUE |
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