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NSN 5305-01-168-3903

High Torque Screw

About this product

Between 0.660 inches and 0.690 inches fastener length, oval countersunk head style, between 0.3898 inches and 0.3948 inches head diameter, grip diameter: between 0.2485 inches and 0.2495 inches .

Manufacturer part number SC1786RE4-04 for national stock number 5305011683903.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-168-3903.

  • MPN or Model

    SC1786RE4-04

  • 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
  • Unit Weight (Est.)
    0.1 lb
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.425 inches
  • Fastener Length
    Between 0.660 inches and 0.690 inches
  • Head Style
    Oval countersunk
  • Head Diameter
    Between 0.3898 inches and 0.3948 inches
  • Grip Diameter
    Between 0.2485 inches and 0.2495 inches
  • Internal Drive Style
    High-torque
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.240 inches and 0.260 inches
  • Thready Qty Per Inch (tpi)
    28
  • Min. Tensile Strength (psi)
    95000 pounds per square inch
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Surface Finish
    32.0 microinches threads
  • Material
    Iron alloy 660
  • Material Specification
    Ams 5731 assn standard 1st material response or ams 5737 assn standard 2nd material response
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Ams-qq-p-35 assn standard single treatment response
  • 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 5305011683903

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
SC1786RE4-04 Arconic Global Fasteners & Rings,
E178-2404 Huck International, Inc.
LE111-0038-2404 Boeing Company, The
AIC4040E4-04R Sps Technologies, Llc
PBF1382-2404 Sps Technologies, Llc
123179E4R-04 Sps Technologies, Llc
E178-2404 Huck Intl Inc
HT4032V4-4 Hi-shear Corporation
HT4032V4-4 Alcoa Global Fasteners, Inc.
Stock Check
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