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National Stock Number:
5305-00-767-3272
Federal Supply Class:
5305
National Item Identification Number:
007673272
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:
| 51B220-4 | 06725 | SPS TECHNOLOGIES, LLC | | 51B220-4 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 51B220-4 | 0JRC1 | NORTHROP GRUMMAN TECHNICAL SERVICES, INC. | | 51B220-4 | 17446 | HUCK INTERNATIONAL, INC | | 51B220-4 | 27624 | SPS TECHNOLOGIES LLC | | 51B220-4 | 73197 | HI-SHEAR CORPORATION | | 51B220-4 | 76823 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 51B220-4 | 79U29 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 51B220-4 | 80539 | SPS TECHNOLOGIES, LLC | | 51B220-4 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| FASTENER LENGTH | 0.511 INCHES MINIMUM AND 0.558 INCHES MAXIMUM | | GRIP DIAMETER | 0.1620 INCHES MINIMUM AND 0.1630 INCHES MAXIMUM | | GRIP LENGTH | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM | | HEAD DIAMETER | 0.328 INCHES NOMINAL | | HEAD HEIGHT | 0.088 INCHES MINIMUM AND 0.102 INCHES MAXIMUM | | HEAD STYLE | PAN | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL | STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP E4340 OVERALL | | MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.164 INCHES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD LENGTH | 0.276 INCHES MINIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD SERIES DESIGNATOR | UNJC | | THREAD QUANTITY PER INCH | 32 |
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