National Item Identification Number
00-291-5245
National Stock Number
Item Name
BOLT,CLOSE TOLERANCE
Federal Supply Class
5306
Description
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.
Commercial and Government Entity Code (Supplier Data)
17446
0UCY9
M.S. AEROSPACE
13928 BALBOA BLVD.
SYLMAR
CA
91342
818-833-9095
06710
06725
27624
56878
57928
73197
Reference Numbers (Part Numbers)
BM17019-5-8
BM17019-5-8
ST3M453-5-8
ST3M453-5-8
ST3M453-5-8
ST3M453-5-8
ST
Required Categories
THREAD SERIES DESIGNATOR
NOMINAL THREAD DIAMETER
THREAD QUANTITY PER INCH
THR
Required Description
UNJF
0.312 INCHES
24
3A
RIGHT-HAND
0.441 INCHES MINIMUM AND
0.508 INCHES M
