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NSN 5305-00-891-1721

High Torque Screw

About this product

Between 0.815 inches and 0.862 inches fastener length, flat countersunk head style, between 0.376 inches and 0.385 inches head diameter, grip diameter: between 0.1885 inches and 0.1895 inches .

Manufacturer part number 3M263-3-8 for national stock number 5305008911721.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-00-891-1721.

  • MPN or Model

    3M263-3-8

  • 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)
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    Between 0.305 inches and 0.372 inches
  • Fastener Length
    Between 0.815 inches and 0.862 inches
  • Head Style
    Flat countersunk
  • Head Diameter
    Between 0.376 inches and 0.385 inches
  • Grip Diameter
    Between 0.1885 inches and 0.1895 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.190 inches
  • Grip Length
    Between 0.490 inches and 0.510 inches
  • Thready Qty Per Inch (tpi)
    32
  • Min. Tensile Strength (psi)
    220000 pounds per square inch
  • Hardness Rating
    46.0 rockwell c and 50.0 rockwell c
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Steel comp h11
  • Surface Treatment
    Cadmium and chromate
  • Surface Treatment Specification
    Mac ps13145 fscm 76301 mfr ref all treatment responses
  • 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 5305008911721

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
3M263-3-8 Boeing Company, The
HT195-3-8 Alcoa Fastening Systems
HT8115-3-8 Alcoa Fastening Systems
HT195-3-8 Hi-shear Corporation
HT8115-3-8 Alcoa Global Fasteners, Inc.
HT195-3-8 Lisi Aerospace Canada Corp
66117H3-8 Sps Technologies Inc
HS2623-3Z8 Huck International, Inc.
3M263-3-8 Sps Technologies, Llc
HT195-3-8 Satair A/s
HS2623-3Z8 Huck Intl Inc
3M263-3-8 Kitco, Llc
3M263-3-8 Associated Aircraft Manufacturing &
3M263-3-8 Derco Aerospace, Inc.
Stock Check
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