Product Details | CLOSE TOLERANCE BOLT

5306-01-244-5255 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.

Part Alternates: NAS6604P24, BACB30NE4LN24, BACB30NE4P24 , 5306-01-244-5255, 01-244-5255, 5306012445255, 012445255

Hardware and Abrasives | Bolts

Supply Group (FSG) NSN Assign. NIIN
53 14 NOV 1986 01-244-5255

Drawings & Photos | NSN 5306-01-244-5255


Cross Reference | NSN 5306-01-244-5255

Part Number Cage Code Manufacturer
BACB30NE4LN24 81205 THE BOEING COMPANY DBA BOEING
BACB30NE4P24 81205 THE BOEING COMPANY DBA BOEING
NAS6604P24 80205 NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES

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Technical Data | NSN 5306-01-244-5255

Characteristic Specifications
THREAD SERIES DESIGNATOR UNJF
NOMINAL THREAD DIAMETER 0.250 INCHES
THREAD QUANTITY PER INCH 28
THREAD CLASS 3A
THREAD DIRECTION RIGHT-HAND
THREAD LENGTH 0.425 INCHES NOMINAL
FASTENER LENGTH 2.340 INCHES MINIMUM AND 2.360 INCHES MAXIMUM
MATERIAL STEEL COMP 4340 OVERALL
SURFACE TREATMENT CADMIUM OVERALL
HEAD STYLE C1 HEXAGON
HEAD HEIGHT 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM
WIDTH BETWEEN FLATS 0.429 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
GRIP LENGTH 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM
GRIP DIAMETER 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
SURFACE FINISH 32.0 MICROINCHES BEARING SURFACE OF HEAD 125.0 MICROINCHES GRIP 32.0 MICROINCHES THREADS
SPECIFICATION/STANDARD DATA 80205-NAS6604P24 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD

Restrictions/Controls & Freight Information | NSN 5306-01-244-5255

Category Code Description
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:BMunitions List Item - Mutilation (MUT) to the point of scrap required. (Formerly: Demilitarization not required. Trade Security Controls (TSCs) required at disposition.)
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
No Freight Information