BACB30NR4K44

View detailed technical data, stock status, and sourcing information for: BACB30NR4K44
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-580-6414

Item Name Code

15903

Assigment Date

12/22/2009 (16 years ago)

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.

right-hand thread direction, 0.384 inches minimum and 0.394 inches maximum thread length, dished hexagon head style, 3.249 inches minimum and 3.294 inches maximum fastener length, 3a thread class

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3a
Thread Direction: right-hand
Thread Length: 0.384 inches minimum and 0.394 inches maximum
Fastener Length: 3.249 inches minimum and 3.294 inches maximum
Head Style: dished 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 Diameter: 0.248 inches minimum and 0.249 inches maximum
End Item Identification: kc-46a aircraft
Nominal Thread Diameter: 0.250 inches
Grip Length: 2.740 inches minimum and 2.760 inches maximum
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 95000 pounds per square inch
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Surface Finish: 63.0 microinches bearing surface of head
Special Features: item is faa certified
Material: titanium alloy overall
Material Document And Classification: ams 4928 assn std single material response or ams 4967 assn std single material response overall
Surface Treatment: aluminum overall
Surface Treatment Document And Classification: bms10-85, type 1, class a assn std single treatment response overall
Thread Series Designator: unjf