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NSN 5305-01-521-5144

High Torque Screw

About this product

Per asme b46.1. "d" diameter underside of head, root of threads and thread flanks 32 microinches ra. All other surfaces, 125 microinches ra..

Manufacturer part number BACS12HW5AU14 for national stock number 5305015215144.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-521-5144.

  • MPN or Model

    BACS12HW5AU14

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.375 inches
  • Fastener Length
    Between 1.235 inches and 1.265 inches
  • Head Style
    Flat chamfer
  • Head Diameter
    Between 0.594 inches and 0.615 inches
  • Head Height
    Between 0.203 inches and 0.218 inches
  • Spline Minor Diameter
    Between 0.157 inches and 0.160 inches
  • Spline Major Diameter
    Between 0.219 inches and 0.222 inches
  • Locking Feature
    Prevailing torque all metal design
  • Grip Diameter
    Between 0.3115 inches and 0.3120 inches
  • Internal Drive Style
    Torx
  • End Application
    Mv-22 aircraft
  • Thread Diameter
    0.3125 inches
  • Grip Length
    Between 0.865 inches and 0.885 inches
  • Thready Qty Per Inch (tpi)
    24
  • Criticality Code Justification
    Agav
  • Part Name Assigned By Controlling Agency
    Screw, pan head, close tolerance, short thread, six lobe
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5731 a286 assn standard single material response or ams 5732 a286 assn standard single material response or ams 5737 a286 assn standard single material response or ams 5853 a268 assn standard single material response
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Ams-qq-p-35, type ii or viii assn standard single treatment response
  • Thread Series Designator
    Unjf
More from these suppliers
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 5305015215144

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
BACS12HW5AU14 The Boeing Company
BACS12HW5AU14 The Boeing Company
BACS12HW5AU14 Sps Technologies, Llc
BACS12HW5AU14 Heartland Precision Fasteners, Inc.
Stock Check
Availability for this item was last checked on 04/19/21. The quantities and conditions available at the time were:
  • NS: 12
  • NE: 668