|
|
|
National Stock Number:
5306-01-321-1704
Federal Supply Class:
5306
National Item Identification Number:
013211704
Description:
BOLT,CLOSE TOLERANCE
Detail:
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see BOLT, SHEAR. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see BOLT, MACHINE.
|
Manufacturer Information:
| BACB30NF8D19 | 81205 | THE BOEING COMPANY |
|
Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.5000 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.541 INCHES NOMINAL | | FASTENER LENGTH | 1.713 INCHES MINIMUM AND | | 1.743 INCHES MAXIMUM | | MATERIAL | STEEL COMP 4340 OR | | STEEL COMP 8740 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OR | | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OR | | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | HEXAGON EXTENDED WASHER | | HEAD HEIGHT | 0.250 INCHES MINIMUM AND | | 0.265 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.746 INCHES NOMINAL | | EXTENDED WASHER DIAMETER | 0.734 INCHES MINIMUM AND | | 0.752 INCHES MAXIMUM | | EXTENDED WASHER THICKNESS | 0.015 INCHES MINIMUM AND | | 0.025 INCHES MAXIMUM | | GRIP LENGTH | 1.178 INCHES MINIMUM AND | | 1.198 INCHES MAXIMUM | | GRIP DIAMETER | 0.4985 INCHES MINIMUM AND | | 0.4995 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.542 INCHES NOMINAL FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND | | 0.116 INCHES MAXIMUM FIRST HOLE | | SPECIAL FEATURES | TOP OF HEAD IS DISHED,0.49/0.51 IN. DIA | | THE MANUFACTURERS DATA | | | MANUFACTURERS CODE | 81205 | | DESIGN CONTROL REFERENCE | BACB30NF8D19 |
|
|