NSN 5306-01-081-8926

Part Details | CLOSE TOLERANCE BOLT

5306-01-081-8926 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.

Alternate Parts: MS2125007100, MS21250-07100, 5306-01-081-8926, 01-081-8926, 5306010818926, 010818926

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53AUG 22, 197901-081-892627851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON

Cross Reference | NSN 5306-01-081-8926
Part Number Cage Code Manufacturer
MS21250-0710096906MILITARY STANDARDSPROMULGATED BY MILITARY DEPARTMENTS
Technical Data | NSN 5306-01-081-8926
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.438 INCHES
THREAD QUANTITY PER INCH20
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.740 INCHES MINIMUM AND 0.742 INCHES MAXIMUM
FASTENER LENGTH6.990 INCHES MINIMUM AND 6.992 INCHES MAXIMUM
MINIMUM TENSILE STRENGTH200000 POUNDS PER SQUARE INCH
HEAD STYLE0 HEXAGON
HEAD HEIGHT0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.561 INCHES NOMINAL
EXTENDED WASHER DIAMETER0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM
EXTENDED WASHER THICKNESS0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM
GRIP LENGTH6.240 INCHES MINIMUM AND 6.260 INCHES MAXIMUM
GRIP DIAMETER0.4360 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM