PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1B6161Washer,key

Caterpillar Inc Div Caterpillar Defense · NSN 5310-00-484-5739 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-484-5739 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-484-5739. Primary manufacturer part number: 1B6161.
Features
  • Washer,key — FSC 5310
  • Internal Prebent Key Length: 0.125 INCHES NOMINAL IN
  • Material Thickness: 0.062 INCHES NOMINAL IN
  • Hole Diameter: 2.360 INCHES NOMINAL IN
  • External Key Quantity: 19
  • Overall Distance Including Keys: 3.562 INCHES NOMINAL IN
  • Internal Prebent Key Width: 0.262 INCHES NOMINAL IN
  • Outside Diameter: 3.295 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 5310-00-484-5739, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-484-5739
Primary Part Number1B6161
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Internal Prebent Key Length0.125 INCHES NOMINAL IN
Material Thickness0.062 INCHES NOMINAL IN
Hole Diameter2.360 INCHES NOMINAL IN
External Key Quantity19
Overall Distance Including Keys3.562 INCHES NOMINAL IN
Internal Prebent Key Width0.262 INCHES NOMINAL IN
Outside Diameter3.295 INCHES NOMINAL IN
Style DesignatorKEY
External Prebent Key Width0.230 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5307-00-514-68345223825 INTERCHANGEABLE
Stud,shouldered
Army, United States Department of the Dba Rock Island Arsenal Jmtc
Cross-Reference Index
Part NumberManufacturer
1B6161 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
Related Parts
5307-00-514-6834INTERCHANGEABLE
STUD,SHOULDERED
5223825

Frequently Asked Questions

What is NSN 5310-00-484-5739?

NSN 5310-00-484-5739 is a Washer,key, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-484-5739?

NSN 5310-00-484-5739 has 1 cross-referenced part number: 1B6161 (Caterpillar Inc Div Caterpillar Defense).

What NSN replaces 5310-00-484-5739?

There is 1 known substitute for 5310-00-484-5739: 5307-00-514-6834. Verify interchangeability with system specifications before substitution.

What are the specifications of 1B6161?

Key specifications for 1B6161: Internal Prebent Key Length: 0.125 INCHES NOMINAL IN; Material Thickness: 0.062 INCHES NOMINAL IN; Hole Diameter: 2.360 INCHES NOMINAL IN; External Key Quantity: 19. 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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