PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

61H492-4Washer,flat

Westinghouse Electric Corp · NSN 5310-00-246-8769 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-246-8769 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-246-8769. Primary manufacturer part number: 61H492-4.
Features
  • Washer,flat — FSC 5310
  • Hardness Rating: 55.0 DUROMETER MINIMUM AND 65.0 DUROMETER MAXIMUM
  • Material: RUBBER SYNTHETIC OVERALL
  • Overall Diameter: 0.497 INCHES NOMINAL IN
  • Thickness: 0.066 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
  • Hole Diameter: 0.365 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Rubber Synthetic Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-246-8769, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Westinghouse Electric Corp. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-246-8769
Primary Part Number61H492-4
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerWestinghouse Electric Corp
StatusACTIVE
Hardness Rating55.0 DUROMETER MINIMUM AND 65.0 DUROMETER MAXIMUM
MaterialRUBBER SYNTHETIC OVERALL
Overall Diameter0.497 INCHES NOMINAL IN
Thickness0.066 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Hole Diameter0.365 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Material Document and ClassificationAMS 3212 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Cross-Sectional Shape StyleRECTANGULAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5331-00-805-2966MS28778-4 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
5331-01-163-3688 INTERCHANGEABLE
O-Ring
Cross-Reference Index
Part NumberManufacturer
AN902-4 Aeronautical Standards Group Dept of Navy and Air Force (USA)
61H492-4 Colt Industries Operating Corp Pratt and Whitney Machine Tool Div
61H492-4 PRIMARY Westinghouse Electric Corp (USA)
Related Parts
5331-00-805-2966INTERCHANGEABLE
O-RING
MS28778-4
5331-01-163-3688INTERCHANGEABLE
O-RING

Frequently Asked Questions

What is NSN 5310-00-246-8769?

NSN 5310-00-246-8769 is a Washer,flat, manufactured by Westinghouse Electric Corp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-246-8769?

NSN 5310-00-246-8769 has 3 cross-referenced part numbers: AN902-4 (Aeronautical Standards Group Dept of Navy and Air Force), 61H492-4 (Colt Industries Operating Corp Pratt and Whitney Machine Tool Div), 61H492-4 (Westinghouse Electric Corp).

What NSN replaces 5310-00-246-8769?

There are 2 known substitutes for 5310-00-246-8769: 5331-00-805-2966, 5331-01-163-3688. Verify interchangeability with system specifications before substitution.

What are the specifications of 61H492-4?

Key specifications for 61H492-4: Hardness Rating: 55.0 DUROMETER MINIMUM AND 65.0 DUROMETER MAXIMUM; Material: RUBBER SYNTHETIC OVERALL; Overall Diameter: 0.497 INCHES NOMINAL IN; Thickness: 0.066 INCHES NOMINAL IN. 9 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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