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NSN 5305-01-521-5685

High Torque Screw

About this product

Between 1.407 inches and 1.437 inches fastener length, flat countersunk head style, 0.951 inches head diameter, grip diameter: between 0.498 inches and 0.499 inches .

Manufacturer part number NAS1790-8-11 for national stock number 5305015215685.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-521-5685.

  • MPN or Model

    NAS1790-8-11

  • 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
    0.735 inches
  • Fastener Length
    Between 1.407 inches and 1.437 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    0.951 inches
  • Grip Diameter
    Between 0.498 inches and 0.499 inches
  • Internal Drive Style
    High-torque
  • End Application
    B-52 acft
  • Thread Diameter
    0.500 inches
  • Grip Length
    Between 0.677 inches and 0.697 inches
  • Thready Qty Per Inch (tpi)
    20
  • Countersink Angle
    100.0 degrees
  • Part Name Assigned By Controlling Agency
    Close tolerance screw
  • Material
    Steel comp 4140
  • 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 5305015215685

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1790-8-11 National Aerospace Standards
NAS1790-8-11 The Boeing Company
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