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National Stock Number:
5305-01-350-4548
Federal Supply Class:
5305
National Item Identification Number:
013504548
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:
| 1128CSM46503-13 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 1128CSM46503-13 | 61174 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 1128CSM46503-13 | 65759 | DELPO PRECISION TOOL AND INSTRUMENT CO | | 1128CSM46503-13 | 79RG9 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 1128CSM46503-13 | 9J659 | D F P MANUFACTURING CORP DBA D F P |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNF | | NOMINAL THREAD DIAMETER | 0.375 INCHES | | THREAD QUANTITY PER INCH | 24 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.819 INCHES MINIMUM AND | | 0.850 INCHES MAXIMUM | | FASTENER LENGTH | 1.194 INCHES MINIMUM AND | | 1.225 INCHES MAXIMUM | | MATERIAL | STEEL COMP 4130 OR | | STEEL COMP 4140 OR | | STEEL COMP 4340 OR | | STEEL COMP 6150 OR | | STEEL COMP 8630 OR | | STEEL COMP 8740 OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HARDNESS RATING | 37.0 ROCKWELL C MINIMUM AND | | 40.0 ROCKWELL C MAXIMUM OVERALL | | MINIMUM TENSILE STRENGTH | 165000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.752 INCHES MINIMUM AND | | 0.762 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | SLOT | | GRIP LENGTH | 0.375 INCHES NOMINAL | | GRIP DIAMETER | 0.3735 INCHES MINIMUM AND | | 0.3745 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.124 INCHES MINIMUM AND | | 1.155 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.075 INCHES MINIMUM AND | | 0.080 INCHES MAXIMUM FIRST HOLE |
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