NSN 5306-01-377-7278

Part Details | CLOSE TOLERANCE BOLT

5306-01-377-7278 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: VS3190424, VS3190-4-24, VS3190424, VS3190-4-24, ST3M753424, ST3M753-4-24, MB156424, MB156-4-24, S343424, S343-4-24, S343424, S343-4-24, MB156424, MB156-4-24, 10116274, 11829424, 11829-4-24, 12897424, 12897-4-24, AIC763424, AIC763-4-24, PBF 1267, VFK600424, VFK600-4-24, 5306-01-377-7278, 01-377-7278, 5306013777278, 013777278

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
53JUL 23, 199301-377-727827851 ( BOLT, CLOSE TOLERANCE )
REFERENCE DRAWINGS & PICTURES

HEXAGON

Cross Reference | NSN 5306-01-377-7278
Part Number Cage Code Manufacturer
VS3190-4-2492215ARCONIC GLOBAL FASTENERS & RINGS,INC.
VS3190-4-2406950ARCONIC GLOBAL FASTENERS & RINGS,INC.
ST3M753-4-2476301BOEING COMPANY, THEDBA BOEING
MB156-4-2473197HI-SHEAR CORPORATION
S343-4-2417446HUCK INTERNATIONAL, INC.DBA ARCONIC FASTENING SYSTEMS AND
S343-4-2497928HUCK INTL INC
MB156-4-24L4528LISI AEROSPACE CANADA CORPDIV HI SHEAR HOLDINGS INC
10116274A486GNIMIKKEISTOKESKUS NCB FINLAND
11829-4-2459563REID PRODUCTS INC.DBA REID PRODUCTS
12897-4-2480539SPS TECHNOLOGIES, LLCDBA AEROSPACE FASTENERS GROUP
AIC763-4-2406725SPS TECHNOLOGIES, LLCDBA AIR INDUSTRIES
PBF 126727624SPS TECHNOLOGIES, LLCDBA PB FASTENERS
VFK600-4-2406710VALLEY-TODECO, INC.DBA ARCONIC FASTENING SYSTEMS AND
Technical Data | NSN 5306-01-377-7278
Characteristic Specifications
THREAD SERIES DESIGNATOR UNF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH0.298 INCHES MINIMUM AND 0.399 INCHES MAXIMUM
FASTENER LENGTH1.982 INCHES NOMINAL
MINIMUM TENSILE STRENGTH220000 POUNDS PER SQUARE INCH
HEAD STYLE1 HEXAGON
HEAD HEIGHT0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM
EXTENDED WASHER DIAMETER0.470 INCHES MINIMUM AND 0.480 INCHES MAXIMUM
EXTENDED WASHER THICKNESS0.162 INCHES MINIMUM AND 0.182 INCHES MAXIMUM
HEAD MINOR DIAMETER0.297 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
GRIP LENGTH1.500 INCHES NOMINAL
GRIP DIAMETER0.2480 INCHES MINIMUM AND 0.2485 INCHES MAXIMUM