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National Stock Number:
5305-01-277-7326
Federal Supply Class:
5305
National Item Identification Number:
012777326
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:
| 123463S3-17 | 80539 | SPS TECHNOLOGIES, LLC | | GB510DY3S17 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | HR243E3-17 | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG | | HR243E3-17 | 73197 | HI-SHEAR CORPORATION | | HR243E3-17 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.338 INCHES MINIMUM AND | | 0.388 INCHES MAXIMUM | | FASTENER LENGTH | 1.411 INCHES MINIMUM AND | | 1.441 INCHES MAXIMUM | | MATERIAL | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR RING | | STEEL COMP 8740 FASTENER | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-R-6855 CL1 GR 60 MIL SPEC SINGLE MATERIAL RESPONSE RING | | AMS6322 ASSN STD SINGLE MATERIAL RESPONSE OR | | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE FASTENER | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE FASTENER | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | HEAD DIAMETER | 0.339 INCHES MINIMUM AND | | 0.381 INCHES MAXIMUM | | HEAD HEIGHT | 0.044 INCHES MINIMUM AND | | 0.046 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | TORQUE-SET RIBBED | | GRIP LENGTH | 1.053 INCHES MINIMUM AND | | 1.073 INCHES MAXIMUM | | GRIP DIAMETER | 0.1890 INCHES MINIMUM AND | | 0.1895 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | | FEATURES PROVIDED | O RING AND | | CETYL ALCOHOL LUBRICANT | | SPECIAL FEATURES | O-RING INSIDE DIA 0.174 IN. MIN,0.184 IN. MAX; O-RING THICKNESS 0.023 IN. MIN,0.027 IN. MAX | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
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