NSN 5305-01-396-9650

High Torque Screw

About this product

Between 0.953 inches and 0.968 inches fastener length, pan no. 2 head style, between 0.385 inches and 0.395 inches head diameter, head height: between 0.172 inches and 0.187 inches .

Manufacturer part number GB511GK4-6 for national stock number 5305013969650.


  • Product description

    Close Tolerance Screw NSN 5305-01-396-9650.

  • MPN or Model


  • 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
  • Thread Direction
  • Thread Length
    Between 0.578 inches and 0.593 inches
  • Fastener Length
    Between 0.953 inches and 0.968 inches
  • Head Style
    Pan no. 2
  • Head Diameter
    Between 0.385 inches and 0.395 inches
  • Head Height
    Between 0.172 inches and 0.187 inches
  • Grip Diameter
    Between 0.2490 inches and 0.2495 inches
  • Internal Drive Style
    Torque-set ribbed
  • Thread Diameter
    0.250 inches
  • Grip Length
    Between 0.365 inches and 0.385 inches
  • Thready Qty Per Inch (tpi)
  • Min. Tensile Strength (psi)
    220000 pounds per square inch
  • Part Name Assigned By Controlling Agency
    Navy special project
  • Material
    Nickel alloy 718
  • Material Specification
    Ams 5662 assn standard single material response
  • Surface Treatment
  • Surface Treatment Specification
    Qq-p-35 federal specification single treatment response
  • Thread Series Designator
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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 5305013969650

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
GB511GK4-6 Northrop Grumman Systems Corporation
GB511GK4-6 Sps Technologies, Llc
GB511GK4-6 Valley-todeco, Inc.
PBF1510-4-6 Sps Technologies, Llc
GB511GK4-6 Sps Technologies, Llc
Stock Check
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