NSN 5306-01-251-0777

Part Details | CLOSE TOLERANCE BOLT

5306-01-251-0777 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: MS27576926, MS27576-9-26, MS27576926, MS27576-9-26, 5306-01-251-0777, 01-251-0777, 5306012510777, 012510777

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53MAR 12, 198701-251-077727851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

CROWNED HEXAGON

Cross Reference | NSN 5306-01-251-0777
Part Number Cage Code Manufacturer
MS27576-9-2696906MILITARY STANDARDSPROMULGATED BY MILITARY DEPARTMENTS
MS27576-9-2680205NATIONAL AEROSPACE STANDARDSCOMMITTEE AEROSPACE INDUSTRIES
Technical Data | NSN 5306-01-251-0777
Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER0.562 INCHES
THREAD QUANTITY PER INCH18
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.589 INCHES MAXIMUM
FASTENER LENGTH2.411 INCHES MINIMUM AND 2.431 INCHES MAXIMUM
MINIMUM TENSILE STRENGTH95000 POUNDS PER SQUARE INCH
HEAD STYLE CROWNED HEXAGON
HEAD HEIGHT0.282 INCHES MINIMUM AND 0.297 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM
GRIP LENGTH1.625 INCHES MINIMUM AND 1.641 INCHES MAXIMUM
GRIP DIAMETER0.5607 INCHES MINIMUM AND 0.5616 INCHES MAXIMUM
SPECIAL FEATURESRETAINING ELEMENT ON SHANK