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Square Neck Bolt

NSN: 5306-00-889-2943 | Model: ASME B18.5

A headed externally threaded fastener whose threaded portion is of one diameter, with a square neck directly beneath the head.

NSN Properties and Flags
NATO Stock Number
Thread Class
Thread Direction
Thread Length
0.750 inches
Fastener Length
Between 1.219 inches and 1.281 inches
Head Style
Head Diameter
Between 0.563 inches and 0.594 inches
Head Height
Between 0.125 inches and 0.145 inches
Neck Length
Between 0.125 inches and 0.156 inches
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
Min. Tensile Strength (psi)
55000 pounds per square inch
Hardness Rating
95.0 rockwell b
Neck Width
Between 0.245 inches and 0.260 inches
Material Specification
Sae gr 1 assn standard single material response
Surface Treatment
Surface Treatment Specification
Astm b633 assn standard single treatment response
Thread Series Designator

Inventory Check

The last inventory check on this NSN was done on 02/12/2024. Due to rapid changes in inventory this may not be the current stock qty.

  • New Surplus: 816
  • New: 1717

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 5306-00-889-2943 Datasheet

Supply Class (FSC):
Cross Reference:
  • ASME B18.5
  • FF-B-584
  • FF-B-584 TY1CL1STAGR1
  • NASM35751
  • MS35751-16
  • MS35751-17
Cage Codes:
  • American Society Of Mechanical (CAGE 05047)
  • Federal Specifications (CAGE 81348)
  • General Services Administration (CAGE 80244)
  • Military Standards (CAGE 96906)
  • 5306-00-889-2943 replaces 5306-00-012-8390
  • 5306-00-889-2943 replaces 5306-00-054-8008
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.


- 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
    No qup
  • 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 $47.39 to $78.98..
Does NSN 5306-00-889-2943 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, U.s. Marine Corps, Department Of The Navy, National Aeronautics and Space Administration, General Services Administration, Lithuania, Canada, United Kingdom, Greece, and Turkey
What is the NIIN of NSN 5306-00-889-2943?
008892943 or 00-889-2943
Does NSN 5306-00-889-2943 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5306-00-889-2943?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 01, 1963