1-321-802-5889

NSN 5305-01-526-6960

High Torque Screw

About this product

1.594 inches fastener length, fillister countersunk head style, between 0.390 inches and 0.395 inches head diameter, head height: 0.015 inches .

Manufacturer part number HT4027-4-18 for national stock number 5305015266960.

Datasheet

  • Product description

    Close Tolerance Screw NSN 5305-01-526-6960.

  • MPN or Model

    HT4027-4-18

  • Schedule B
    7508.90.0000 (Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire))
  • NMF (National Motor Freight)
    096640 - Screws, Iron Or Steel
  • Thread Class
    3a
  • Thread Direction
    Right-hand
  • Thread Length
    0.469 inches
  • Fastener Length
    1.594 inches
  • Head Style
    Fillister countersunk
  • Head Diameter
    Between 0.390 inches and 0.395 inches
  • Head Height
    0.015 inches
  • Grip Diameter
    Between 0.249 inches and 0.250 inches
  • Internal Drive Style
    High-torque
  • End Application
    F/a-18 c/d
  • Thread Diameter
    0.250 inches
  • Grip Length
    1.125 inches
  • Thready Qty Per Inch (tpi)
    28
  • Countersink Angle
    Between 99.0 degrees and 101.0 degrees
  • Material
    Nickel alloy 718
  • Material Specification
    Ams5662 assn standard single material response
  • Surface Treatment
    Passivate
  • Surface Treatment Specification
    Qq-p-35 federal specification single treatment response
  • Thread Series Designator
    Unjf
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 5305015266960

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
HT4027-4-18 Arconic Global Fasteners & Rings,
ST3M557-4-18 Fastener Innovation Technology, Inc.
HT4027-4-18 Sps Technologies, Llc
WC4027-4-18 West Coast Aerospace Inc
HT4027-4-18 Hi-shear Corporation
HT4027-4-18 Sps Technologies, Llc
HT4027-4-18 Lisi Aerospace Canada Corp
ST3M557-4-18 Boeing Company, The
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