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NSN 5306-01-281-3035

Close Tolerance Hex Head Bolt

About this product

Between 1.282 inches and 1.312 inches fastener length, hexagon countersunk head style, between 0.250 inches and 0.265 inches head height, locking feature: pellet threads.

Manufacturer part number NAS1228C9N for national stock number 5306012813035.

Datasheet

  • Product description

    Close Tolerance Bolt NSN 5306-01-281-3035.

  • MPN or Model

    NAS1228C9N

  • 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.)
    0.4 lb
  • Thread Class
    3a
  • Thread Length
    0.735 inches
  • Fastener Length
    Between 1.282 inches and 1.312 inches
  • Head Style
    Hexagon countersunk
  • Head Height
    Between 0.250 inches and 0.265 inches
  • Locking Feature
    Pellet threads
  • Grip Diameter
    Between 0.4990 inches and 0.4995 inches
  • End Application
    Pump, turbine ejection sys mk 19 mod 0
  • Thread Diameter
    0.500 inches
  • Grip Length
    Between 0.552 inches and 0.572 inches
  • Thready Qty Per Inch (tpi)
    20
  • Criticality Code Justification
    Zzzy
  • Surface Finish
    63.0 microinches bearing surface of head
  • Material
    Stainless steel
  • Thread Series Designator
    Unjf
  • Specification Data
    80205-nas1228 professional/industrial association standard
  • Reference Number Differentiating Characteristics
    Quality control in accordance with navships 0948-045-7010 material identification and control instruction for level 1 items
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Close Tolerance Bolt

An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see bolt, shear. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see bolt, machine.

Mechanic Bill explains Close Tolerance Hex Head Bolt

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NSN 5306012813035

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
NAS1228C9N Lawrence Engineering And Supply Inc
NAS1228C9NL1 Naval Inventory Control Point
Stock Check
Availability for this item was last checked on 09/23/20. The quantities and conditions available at the time were:
  • NE: 36
  • NS: 1