PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-R-3065EWasher,flat

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5310-00-254-1660 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-254-1660 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-254-1660. Primary manufacturer part number: MIL-R-3065E.
Features
  • Washer,flat — FSC 5310
  • Material: RUBBER SYNTHETIC OVERALL
  • Center Hole Shape Style: ROUND
  • Hole Diameter: 0.437 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
  • Overall Diameter: 1.000 INCHES NOMINAL IN
  • Thickness: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
  • Cross-Sectional Shape Style: RECTANGULAR
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 5310-00-254-1660, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-254-1660
Primary Part NumberMIL-R-3065E
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
MaterialRUBBER SYNTHETIC OVERALL
Center Hole Shape StyleROUND
Hole Diameter0.437 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Overall Diameter1.000 INCHES NOMINAL IN
Thickness0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN
Cross-Sectional Shape StyleRECTANGULAR
Material Document and Classification417,GR SB415 MIL STD SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5330-00-165-1848 INTERCHANGEABLE
Gasket
5310-00-291-2753734913-27 INTERCHANGEABLE
Washer,flat
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5330-00-297-7355MIL-R-3065E INTERCHANGEABLE
Gasket
American Society for Testing and Materials Dba Astm International
5331-00-580-12172H3933 INTERCHANGEABLE
O-Ring
Caterpillar Inc Div Caterpillar Defense
5330-00-580-2011 INTERCHANGEABLE
Gasket
5310-00-599-5706 INTERCHANGEABLE
Washer,flat
9320-00-641-3391 INTERCHANGEABLE
Rubber Sheet,solid
5330-00-846-4339334C251H01 INTERCHANGEABLE
Gasket
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5331-00-912-26628624710-3 INTERCHANGEABLE
O-Ring
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5330-00-919-726411588725 INTERCHANGEABLE
Seal,nonmetallic Special Shaped
U S Army Tank Automotive Command Amsta-Im-Mm
Cross-Reference Index
Part NumberManufacturer
MIL-R-3065E Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
367486PC5 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
Related Parts
5330-00-165-1848INTERCHANGEABLE
GASKET
5310-00-291-2753INTERCHANGEABLE
WASHER,FLAT
734913-27
5330-00-297-7355INTERCHANGEABLE
GASKET
MIL-R-3065E
5331-00-580-1217INTERCHANGEABLE
O-RING
2H3933
5330-00-580-2011INTERCHANGEABLE
GASKET
5310-00-599-5706INTERCHANGEABLE
WASHER,FLAT
9320-00-641-3391INTERCHANGEABLE
RUBBER SHEET,SOLID
5330-00-846-4339INTERCHANGEABLE
GASKET
334C251H01
5331-00-912-2662INTERCHANGEABLE
O-RING
8624710-3
5330-00-919-7264INTERCHANGEABLE
SEAL,NONMETALLIC SPECIAL SHAPED
11588725
5331-00-964-7291INTERCHANGEABLE
O-RING

Frequently Asked Questions

What is NSN 5310-00-254-1660?

NSN 5310-00-254-1660 is a Washer,flat, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-254-1660?

NSN 5310-00-254-1660 has 2 cross-referenced part numbers: MIL-R-3065E (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 367486PC5 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).

What NSN replaces 5310-00-254-1660?

There are 11 known substitutes for 5310-00-254-1660: 5330-00-165-1848, 5310-00-291-2753, 5330-00-297-7355 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-R-3065E?

Key specifications for MIL-R-3065E: Material: RUBBER SYNTHETIC OVERALL; Center Hole Shape Style: ROUND; Hole Diameter: 0.437 INCHES NOMINAL IN; Peripheral Shape Style: ROUND. 8 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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