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NSN 5305-00-557-8239

High Torque Screw

About this product

Between 0.676 inches and 0.706 inches fastener length, flat countersunk head style, between 0.363 inches and 0.395 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number VT1051-4-6 for national stock number 5305005578239.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-557-8239.

  • MPN or Model

    VT1051-4-6

  • 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
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.220 inches and 0.341 inches
  • Fastener Length
    Between 0.676 inches and 0.706 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.363 inches and 0.395 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    Offset cruciform (torque set)
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.365 inches and 0.385 inches
  • Thready Qty Per Inch (tpi)
    28
  • Hardness Rating
    36.0 rockwell c and 40.0 rockwell c
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Surface Finish
    32.0 microinches threads
  • Material
    Steel comp 4140 or steel comp 8740 or steel comp 4130
  • Surface Treatment
    Cadmium
  • Surface Treatment Specification
    Qq-p-416, type 1, cl 3 federal specification single treatment response
  • Thread Series Designator
    Unf
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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 5305005578239

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
VT1051-4-6 Arconic Global Fasteners & Rings,
VT1051-4-6 Alcoa Global Fasteners, Inc.
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