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National Stock Number:
5305-01-580-9995
Federal Supply Class:
5305
National Item Identification Number:
015809995
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:
| BACB30XD4K8 | 06710 | VALLEY-TODECO, INC. | | BACB30XD4K8 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30XD4K8 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30XD4K8 | 16258 | SPACE-LOK, INC. | | BACB30XD4K8 | 17446 | HUCK INTERNATIONAL, INC | | BACB30XD4K8 | 17943 | FEDERAL MANUFACTURING CORP | | BACB30XD4K8 | 1ER65 | 3-V FASTENER CO., INC. | | BACB30XD4K8 | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30XD4K8 | 27624 | SPS TECHNOLOGIES LLC | | BACB30XD4K8 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30XD4K8 | 57928 | SONIC INDUSTRIES, INC. | | BACB30XD4K8 | 60516 | WEST COAST AEROSPACE, INC. | | BACB30XD4K8 | 73197 | HI-SHEAR CORPORATION | | BACB30XD4K8 | 81205 | THE BOEING COMPANY |
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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 | 0.365 INCHES MINIMUM AND | | 0.375 INCHES MAXIMUM | | FASTENER LENGTH | 0.855 INCHES MINIMUM AND | | 0.885 INCHES MAXIMUM | | MATERIAL | TITANIUM ALLOY OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR | | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BMS 10-85, TYPE 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.442 INCHES NOMINAL | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | GRIP LENGTH | 0.490 INCHES MINIMUM AND | | 0.510 INCHES MAXIMUM | | GRIP DIAMETER | 0.2481 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | | SPECIAL FEATURES | ITEM IS FAA CERTIFIED | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, PAN HEAD, CROSS RECESS, SHORT THREAD |
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