PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

125016Washer,key

Celtrac Corp · NSN 5310-00-209-2573 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-209-2573 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-209-2573. Primary manufacturer part number: 125016.
Features
  • Washer,key — FSC 5310
  • Overall Distance Including Keys: 3.0935 INCHES NOMINAL IN
  • External Key Quantity: 17
  • Internal Prebent Key Width: 0.250 INCHES NOMINAL IN
  • External Straight Key Width: 0.219 INCHES MAXIMUM IN
  • Material: STEEL OVERALL
  • Material Thickness: 0.125 INCHES NOMINAL IN
  • Outside Diameter: 2.65625 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,key, cataloged under National Stock Number 5310-00-209-2573, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Celtrac Corp. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-209-2573
Primary Part Number125016
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCeltrac Corp
StatusACTIVE
Overall Distance Including Keys3.0935 INCHES NOMINAL IN
External Key Quantity17
Internal Prebent Key Width0.250 INCHES NOMINAL IN
External Straight Key Width0.219 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Material Thickness0.125 INCHES NOMINAL IN
Outside Diameter2.65625 INCHES NOMINAL IN
Internal Prebent Key Length0.0625 INCHES NOMINAL IN
Style DesignatorKEY
Hole Diameter2.1875 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5310-00-012-5016187190 INTERCHANGEABLE
Nut,plain,castellated,hexagon
Lockheed Martin Corporation Div Rms - Mitchel Field
5310-00-185-9744125016 INTERCHANGEABLE
Washer,flat
Cummins Inc.
5310-00-186-0970 INTERCHANGEABLE
Washer,key
5325-00-640-9916MR2001190 INTERCHANGEABLE
Grommet,nonmetallic
Modus Advanced Inc. Dba Modus Advanced
2620-00-834-6673 INTERCHANGEABLE
Tire,pneumatic,aircraft
Cross-Reference Index
Part NumberManufacturer
125016 Celtrac Corp (USA)
Related Parts
5310-00-012-5016INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
187190
5310-00-185-9744INTERCHANGEABLE
WASHER,FLAT
125016
5310-00-186-0970INTERCHANGEABLE
WASHER,KEY
5325-00-640-9916INTERCHANGEABLE
GROMMET,NONMETALLIC
MR2001190
2620-00-834-6673INTERCHANGEABLE
TIRE,PNEUMATIC,AIRCRAFT

Frequently Asked Questions

What is NSN 5310-00-209-2573?

NSN 5310-00-209-2573 is a Washer,key, manufactured by Celtrac Corp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-209-2573?

NSN 5310-00-209-2573 has 1 cross-referenced part number: 125016 (Celtrac Corp).

What NSN replaces 5310-00-209-2573?

There are 5 known substitutes for 5310-00-209-2573: 5310-00-012-5016, 5310-00-185-9744, 5310-00-186-0970 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 125016?

Key specifications for 125016: Overall Distance Including Keys: 3.0935 INCHES NOMINAL IN; External Key Quantity: 17; Internal Prebent Key Width: 0.250 INCHES NOMINAL IN; External Straight Key Width: 0.219 INCHES MAXIMUM IN. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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