PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66994Washer,key

Cummins Inc. · NSN 5310-00-374-4313 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-374-4313 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-374-4313. Primary manufacturer part number: 66994.
Features
  • Washer,key — FSC 5310
  • Material Document and Classification: ASTM A576 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Material: STEEL OVERALL
  • Internal Prebent Key Length: 0.094 INCHES NOMINAL IN
  • Internal Prebent Key Width: 0.250 INCHES NOMINAL IN
  • Heat Treatment: AS FABRICATED
  • Material Thickness: 0.062 INCHES NOMINAL IN
  • Internal Key Quantity: 1
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 5310-00-374-4313, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Cummins Inc.. Government technical data includes 9 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-374-4313
Primary Part Number66994
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCummins Inc.
StatusACTIVE
Material Document and ClassificationASTM A576 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL OVERALL
Internal Prebent Key Length0.094 INCHES NOMINAL IN
Internal Prebent Key Width0.250 INCHES NOMINAL IN
Heat TreatmentAS FABRICATED
Material Thickness0.062 INCHES NOMINAL IN
Internal Key Quantity1
Hole Diameter1.531 INCHES NOMINAL IN
Features ProvidedCASEHARDENED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
3930-00-140-3930 INTERCHANGEABLE
Rod,piston
Cross-Reference Index
Part NumberManufacturer
66994 PRIMARY Cummins Inc. (USA)
Related Parts
3930-00-140-3930INTERCHANGEABLE
ROD,PISTON

Frequently Asked Questions

What is NSN 5310-00-374-4313?

NSN 5310-00-374-4313 is a Washer,key, manufactured by Cummins Inc., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-374-4313?

NSN 5310-00-374-4313 has 1 cross-referenced part number: 66994 (Cummins Inc.).

What NSN replaces 5310-00-374-4313?

There is 1 known substitute for 5310-00-374-4313: 3930-00-140-3930. Verify interchangeability with system specifications before substitution.

What are the specifications of 66994?

Key specifications for 66994: Material Document and Classification: ASTM A576 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Material: STEEL OVERALL; Internal Prebent Key Length: 0.094 INCHES NOMINAL IN; Internal Prebent Key Width: 0.250 INCHES NOMINAL 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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