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Plate Self-locking Nut

NSN: 5310-00-990-3591 | Model: MILN25027

A nut with a flanged base of varied shapes which may be plain or mounted by rivets, bolts, welding or integral prongs. An integral feature is incorporated for locking on the threads of a mating member.

NSN Properties and Flags
NATO Stock Number
Thread Class
Thread Direction
Locking Feature
Prevailing torque all metal design
Counterbore Diameter
0.289 inches nut
Overall Height
0.755 inches
Mounting Hole Diameter
Between 0.098 inches and 0.103 inches
Nut Style
Nut Length
1.296 inches
Nut Height
0.372 inches
Plate Thickness
0.030 inches
Plate Width
0.668 inches
Nut Counterbore Depth
0.135 inches nut
Nut Mounting Provision
Straight holes
Mounting Hole Arrangement Style
2 holes
Distance From Aperture Center To Mounting Hole Center
Between 0.495 inches and 0.505 inches
Center To Center Distance Between Mounting Holes Along Length
Between 0.998 inches and 1.002 inches
Tempurature Rating
225.0 degrees fahrenheit
Thread Series
Features Provided
Floating nut
Thready Qty Per Inch (tpi)
Thread Size
0.250 inches
Steel shell
Material Specification
Mil-s-6855, class 1, grade 60 military specification single material response seal
Surface Treatment
Cadmium shell
Surface Treatment Specification
Qq-p-416, type 2, class 3 federal specification single treatment response shell
Specification Data
80205-nas1473 professional/industrial association standard

Pricing and Availability

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NSN 5310-00-990-3591 Datasheet

Supply Class (FSC):
Nuts And Washers
Cross Reference:
  • MILN25027
  • A2502-048
  • 14630H048
  • NAS1473A4
  • 857375-00
  • 9096359
  • A2502-048
  • 14630H048
  • 10121924
Cage Codes:
  • Military Specifications (CAGE 81349)
  • Fitz Aerospace, Llc (CAGE 019L2)
  • Sps Technologies, Llc (CAGE 80539)
  • National Aerospace Standards (CAGE 80205)
  • Defense Reduction Agency (CAGE 32345)
  • Ordnance Corps (CAGE 00000)
  • Harvard Industries Inc (CAGE 72962)
  • Sps Technologies, Llc (CAGE 56878)
  • Nimikkeistokeskus Ncb Finland (CAGE A486G)
  • 5310-00-990-3591 replaces 5310-00-576-0959
  • 5310-00-990-3591 replaces 5310-00-673-9460
Schedule B & Trade:
  • Schedule B: 7318160000 (NAICS 332722)

    Nuts of iron or steel

  • SITC: 69421

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

  • End Use: 12300

    Finished metal shapes


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


U - Precious metal content is unknown


- 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 $14.18 to $23.63..
Does NSN 5310-00-990-3591 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, Defense Threat Reduction Agency, U.s. Marine Corps, Department Of The Navy, U.s. Coast Guard, Finland, Poland, Brazil, Spain, Columbia, Singapore, Kuwait, Malaysia, Australia, Belgium, Canada, New Zealand, France, Germany, Republic Of Korea, United Kingdom, Netherlands, Portugal, Italy, Denmark, Norway, Greece, Turkey, and Nato Maintenance and Supply Agency
What is the NIIN of NSN 5310-00-990-3591?
009903591 or 00-990-3591
Does NSN 5310-00-990-3591 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5310-00-990-3591?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 01, 1962