Product Details | CLOSE TOLERANCE BOLT

5306-01-193-3857 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: BACB30NE4LN24, BACB30NE4P24, 5306-01-193-3857, 01-193-3857, 5306011933857, 011933857

Hardware and Abrasives | Bolts

Supply Group (FSG) NSN Assign. NIIN
53 02-NOV-84 01-193-3857

Drawings & Photos | NSN 5306-01-193-3857


Cross Reference | NSN 5306-01-193-3857

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 5306-01-193-3857

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 0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM
FASTENER LENGTH 2.050 INCHES NOMINAL
MATERIAL STEEL COMP E4340 OR STEEL COMP 8740 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL
SURFACE TREATMENT CADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HEAD STYLE C2 UNDERCUT HEXAGON
HEAD HEIGHT 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM
WIDTH BETWEEN FLATS 0.430 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 32.0 MICROINCHES GRIP 32.0 MICROINCHES THREADS
SPECIAL FEATURES PLASTIC POLYAMIDE PATCH-TYPE ELEMENT ON THREADS
SPECIFICATION/STANDARD DATA 81205-BACB30NE MANUFACTURERS STANDARD

Restrictions/Controls & Freight Information | NSN 5306-01-193-3857

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