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NSN 5305-00-004-2991

High Torque Screw

About this product

0.500 inches fastener length, flat countersunk head style, between 0.259 inches and 0.279 inches head diameter, grip diameter: between 0.1375 inches and 0.1385 inches .

Manufacturer part number 750385-4 for national stock number 5305000042991.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-004-2991.

  • MPN or Model

    750385-4

  • Schedule B
    7318.15.2000 (Bolts and bolts and their nuts or washers exported in the same shipment)
  • NMF (National Motor Freight)
    136500 - Metal NOI/metal Alloys NOI
  • Thread Class
    2a
  • Thread Direction
    Right-hand
  • Thread Length
    0.300 inches
  • Fastener Length
    0.500 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.259 inches and 0.279 inches
  • Grip Diameter
    Between 0.1375 inches and 0.1385 inches
  • Internal Drive Style
    Cross recess type 1
  • Thread Diameter
    0.138 inches
  • Grip Length
    0.200 inches
  • Thready Qty Per Inch (tpi)
    32
  • Countersink Angle
    100.0 degrees
  • Material
    Steel comp 303
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Qq-p-35 federal specification single treatment response
  • Thread Series Designator
    Unc
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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 5305000042991

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750385-4 Bae Systems Information And
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