National Item Identification Number

01-521-8698
015218698
5306-01-521-8698
5306015218698

National Stock Number

Item Name

BOLT,SHEAR

Federal Supply Class

5306

Description

A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. 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. The unthreaded portion is of specific 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. A locking feature may be incorporated in the design of the head or threads. See BOLT, MACHINE and BOLT, CLEVIS.

Commercial and Government Entity Code (Supplier Data)

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81205

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Reference Numbers (Part Numbers)

BACB30NR4DK92

Required Categories

THREAD SERIES DESIGNATOR
MATERIAL
HEAD STYLE
III END ITEM IDENTIFICATION

Required Description

UNC
TITANIUM OVERALL
C1 HEXAGON
B757 AIRCRAFT