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Close Tolerance Bolt

NSN: 5306-00-320-4479 | Model: NAS6603-6

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 major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the shank diameter, but not below the major diameter for applicable class of fit, as shown in the screw thread standards, federal standard 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) tensile strength, see bolt, shear. For items fabricated from material having less than 160, 000 pounds per square inch (1100 megapascals) tensile strength and not having a close tolerance, see bolt, machine.

NSN Properties and Flags
NATO Stock Number
Thread Class
Thread Direction
Thread Length
Between 0.320 inches and 0.370 inches
Fastener Length
Between 0.705 inches and 0.745 inches
Head Style
Undercut hexagon
Head Height
Between 0.110 inches and 0.125 inches
Width Between Flats
Between 0.367 inches and 0.376 inches
Grip Diameter
Between 0.1885 inches and 0.1895 inches
Thread Diameter
0.190 inches
Grip Length
Between 0.365 inches and 0.385 inches
Thready Qty Per Inch (tpi)
Surface Finish
32.0 microinches threads
Steel comp e4340 or steel comp 4340 or steel comp 8740 or steel comp 8740
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, class 3 federal specification single treatment response
Thread Series Designator
Specification Data
81205-bacb30ne manufacturers standard
Recent Solicitations
Solicitation Return by Date Buyer Code Quantity
SPE4A718T6789 2017-12-26 GPP83 72318 EA

Inventory Check

The last inventory check on this NSN was done on 09/28/2022. Due to rapid changes in inventory this may not be the current stock qty.

  • New: 56322
  • New Surplus: 5843
  • Overhauled: 1
  • As Removed: 1

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

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NSN 5306-00-320-4479 Datasheet

Supply Class (FSC):
Cross Reference:
  • NAS6603-6
  • BACB30NE3-6
  • BACB30NE3-6
  • BACB30NE3-6
  • BACB30NE3-6
  • BACB30NE3-6
  • BACB30NE3-6
  • 10114231
Cage Codes:
  • National Aerospace Standards (CAGE 80205)
  • Sps Technologies, Llc (CAGE 06725)
  • Arconic Global Fasteners & Rings, (CAGE 06950)
  • Sps Technologies, Llc (CAGE 80539)
  • Sps Technologies, Llc (CAGE 56878)
  • Alcoa Global Fasteners, Inc. (CAGE 92215)
  • The Boeing Company (CAGE 81205)
  • Nimikkeistokeskus Ncb Finland (CAGE A486G)
  • 5306-00-320-4479 replaces 5306-01-127-7089
Schedule B & Trade:
  • Schedule B: 7318152000 (NAICS 332722)

    Bolts and bolts and their nuts or washers exported in the same shipment

  • SITC: 69421

    Screws, bolts, nuts, screw hooks, rivets, washers and similar articles, threaded, of iron or steel

  • End Use: 12110

    Iron and steel products, other


N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.


A - Item does not contain precious metal.


- Represents items with no adp components


- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    093486 - Bolts, nuts or screws, noi (sub 3)

  • WCC:

    573 - Bolts or nuts (iron or steel),(less than 35 feet)

  • SHC:

    9 - Other or no special handling required (sh)

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    B - Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater

  • LTL:

    W - Rating variable

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
  • AAC
  • Quantity per pack
  • Unit of Measure
  • Shelf Life
  • Classification Control
  • Repariability
    This is a nonreparable item. if condemned or economically unserviceable, then dispose at the level authorized replace the item.

Questions & Answers:

What are the historical prices recorded for this stock number?
Historical data shows pricing from $0.61 to $1.01..
Does NSN 5306-00-320-4479 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Army, Department Of The Air Force, Department Of The Navy, Finland, Lithuania, Poland, Romania, Bulgaria, Brazil, Columbia, Singapore, Malaysia, Australia, Canada, South Africa, New Zealand, France, Republic Of Korea, United Kingdom, Netherlands, Italy, Greece, and Turkey
What is the NIIN of NSN 5306-00-320-4479?
003204479 or 00-320-4479
Does NSN 5306-00-320-4479 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5306-00-320-4479?
Solicitation SPE4A718T6789 for qty 72318 on 12/18/2017
When was this national stock number assigned to the federal catalog?
Nov 16, 1973