NSN 5305-01-182-7681

High Torque Screw

About this product

Between 1.035 inches and 1.065 inches fastener length, flat countersunk head style, between 0.455 inches and 0.510 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number BACB30LU4D10 for national stock number 5305011827681.


  • Product description

    Close Tolerance Screw NSN 5305-01-182-7681.

  • MPN or Model


  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    093486 - Bolts, Nuts Or Screws, NOI (sub 3)
  • Unit Weight (Est.)
    0.1 lb
  • Thread Class
  • Thread Direction
  • Thread Length
    Between 0.400 inches and 0.450 inches
  • Fastener Length
    Between 1.035 inches and 1.065 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.455 inches and 0.510 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Shank Unthreaded Hole Diameter
    0.076 inches first hole and 0.086 inches first hole
  • Internal Drive Style
    Cross recess type 1
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.615 inches and 0.635 inches
  • Thready Qty Per Inch (tpi)
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Distance From Head Largest Bearing Surface To Shank Hole Center
    0.847 inches first hole and 0.897 inches first hole
  • Surface Finish
    32.0 microinches threads
  • Material
    Steel comp e4340 or steel comp 8740
  • Material Specification
    Mil-s-5000 military specification 1st material response or mil-s-6049 military specification 2nd material response or ams 6322 assn standard 2nd material response
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Qq-p-416, type 2 cl 2 federal specification single treatment response
  • Thread Series Designator
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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 5305011827681

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
BACB30LU4D10 Huck International, Inc.
BACB30LU4D10 Valley-todeco, Inc.
BACB30LU4D10 Federal Manufacturing Corporation
BACB30LU4D10 Sps Technologies, Llc
BACB30LU4D10 Arconic Global Fasteners & Rings,
BACB30LU4D10 Sps Technologies, Llc
BACB30LU4D10 Sonic Industries Inc.
BACB30LU4D10 Sps Technologies, Llc
BACB30LU4D10 Alcoa Global Fasteners, Inc.
BACB30LU4D10 The Boeing Company
BACB30LU4D10 Huck Intl Inc
BACB30LU4D10 Sps Technologies, Llc
Stock Check
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