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National Stock Number:
5305-01-455-2055
Federal Supply Class:
5305
National Item Identification Number:
014552055
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:
| 3D0160-4-5 | 88277 | THE BOEING COMPANY | | AIC1515-4-5 | 06725 | SPS TECHNOLOGIES, LLC | | SC5063-4-5 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| FASTENER LENGTH | 0.7755 INCHES MINIMUM AND 0.8055 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.3125 INCHES NOMINAL | | HEAD HEIGHT | 0.095 INCHES MINIMUM AND 0.100 INCHES MAXIMUM | | HEAD DIAMETER | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM | | HEAD STYLE | OVAL | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, MACHINE - TRUSS HEAD, MS33781 RECESS, TITANIUM | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD DIAMETER | 0.1900 INCHES | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.478 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNJF |
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