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National Stock Number:
5305-01-580-0802
Federal Supply Class:
5305
National Item Identification Number:
015800802
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:
| 91829A537 | 39428 | MCMASTER-CARR SUPPLY CO | | P04391 | 0YJB5 | GENERAL ATOMICS AERONAUTICAL SYSTEMS, INC. |
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Techincal Specification:
| FASTENER LENGTH | 0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM | | GRIP DIAMETER | 0.250 INCHES NOMINAL | | GRIP LENGTH | 0.500 INCHES MINIMUM AND 0.502 INCHES MAXIMUM | | HARDNESS RATING | 55.0 ROCKWELL B NOMINAL OVERALL | | HEAD DIAMETER | 0.375 INCHES NOMINAL | | HEAD HEIGHT | 0.188 INCHES NOMINAL | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | FOUR SPANNER | | MATERIAL | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 316 OVERALL | | MINIMUM TENSILE STRENGTH | 70000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | TIGHT-TOLERANCE SHOULDER SCREW | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.250 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNJF |
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