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National Stock Number:
5305-01-621-1050
Federal Supply Class:
5305
National Item Identification Number:
016211050
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:
| PBF1165-5-19 | 27624 | SPS TECHNOLOGIES LLC |
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Techincal Specification:
| FASTENER LENGTH | 19.423 INCHES MINIMUM AND 19.453 INCHES MAXIMUM | | HEAD DIAMETER | 0.135 INCHES NOMINAL | | HEAD MAJOR DIAMETER | 0.573 INCHES MINIMUM AND 0.635 INCHES MAXIMUM | | HEAD STYLE | COUNTERSUNK CYLINDRICAL CONVEX | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, FLUSH HEAD, OFFSET CRUCIFORM RECESS | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | LEFT-HAND | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 24 |
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