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NSN 5305-01-337-4864

High Torque Screw

About this product

Red dye or paint on thread end before lubrication.

Manufacturer part number BACB30MS4R8 for national stock number 5305013374864.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-337-4864.

  • MPN or Model

    BACB30MS4R8

  • Schedule B
    8109.90.0000 (Zirconium and articles thereof nesoi)
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.425 inches
  • Fastener Length
    Between 0.910 inches and 0.940 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.465 inches and 0.510 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.490 inches and 0.510 inches
  • Features Provided
    Cetyl alcohol lubricant
  • Thready Qty Per Inch (tpi)
    28
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Surface Finish
    63.0 microinches bearing surface of head32.0 microinches grip32.0 microinches threads
  • Part Name Assigned By Controlling Agency
    Navy special project
  • Material
    Titanium alloy uns r56400
  • Material Specification
    Ams 4928 assn standard single material response or ams 4967 assn standard single material response
  • Surface Treatment
    Phosphate
  • Surface Treatment Specification
    Bac 5861, cage81205 mfr ref single treatment response
  • Thread Series Designator
    Unjf
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Close Tolerance Screw

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (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 designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

Mechanic Bill explains High Torque Screw

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NSN 5305013374864

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
BACB30MS4R8 Huck International, Inc.
BACB30MS4R8 The Boeing Company
BACB30MS4R8 Huck Intl Inc
BACB30MS4R8 Sps Technologies, Llc
BACB30MS4R8 Sps Technologies, Llc
BACB30MS4R8 Alcoa Global Fasteners, Inc.
BACB30MS4R8 Hi-shear Corporation
BACB30MS4R8 The Boeing Company
BACB30MS4R8 Sps Technologies, Llc
BACB30MS4R8 Hi-shear Corporation
BACB30MS4R8 Sps Technologies, Llc
BACB30MS4R8 Alcoa Global Fasteners, Inc.
BACB30MS4R8 Huck Intl Inc
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