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NSN 5305-01-469-5604

High Torque Screw

About this product

Oval countersunk head style, between 0.390 inches and 0.395 inches head diameter, between 0.2490 inches and 0.2495 inches grip diameter, internal drive style: offset cruciform (torque set).

Manufacturer part number 3M939-4-7 for national stock number 5305014695604.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-469-5604.

  • MPN or Model

    3M939-4-7

  • Schedule B
    7508.90.0000 (Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire))
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Head Style
    Oval countersunk
  • Head Diameter
    Between 0.390 inches and 0.395 inches
  • Grip Diameter
    Between 0.2490 inches and 0.2495 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    0.438 inches
  • Thready Qty Per Inch (tpi)
    28
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Nickel alloy 718
  • Surface Treatment
    Passivate or aluminum
  • 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 5305014695604

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
3M939-4-7 Boeing Company, The
3M939-4-7 Boeing Company, The
3M939-4-7 Boeing Company, The
3M939-4-7 Boeing Company, The
3M939-4-7 Boeing Company, The
3M939-4-7 Boeing Company, The
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