PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2-261S604-70O-Ring

Parker-Hannifin Corp Div O-Ring Division · NSN 5331-00-999-8565 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-999-8565 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-999-8565. Primary manufacturer part number: 2-261S604-70.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
  • Center Hole Diameter: 6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN
  • Material: RUBBER SYNTHETIC
  • Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL
  • Outside Diameter: 6.964 INCHES MINIMUM AND 7.060 INCHES MAXIMUM IN
  • Temp Rating: -65.0 FAHRENHEIT AND 450.0 FAHRENHEIT DEGF
  • 2 verified cross-references
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Synthetic construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-999-8565, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. Government technical data includes 6 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-00-999-8565
Primary Part Number2-261S604-70
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerParker-Hannifin Corp Div O-Ring Division
StatusACTIVE
Cross-Sectional Height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
Center Hole Diameter6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN
MaterialRUBBER SYNTHETIC
Hardness Rating70.0 SHORE DUROMETER A NOMINAL
Outside Diameter6.964 INCHES MINIMUM AND 7.060 INCHES MAXIMUM IN
Temp Rating-65.0 FAHRENHEIT AND 450.0 FAHRENHEIT DEGF
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-069-90492261 INTERCHANGEABLE
Seat,valve
Imi Cash Valve Inc
6685-00-174-62392261-08000QF INTERCHANGEABLE
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Control Specialties Inc
4920-00-257-50952261 INTERCHANGEABLE
Accessory Kit,test Set
Bae Systems Information and Electronic Systems Integration Inc.
9390-00-290-4021 INTERCHANGEABLE
Nonmetallic Special Shaped Secti
6685-00-521-0656PH660U INTERCHANGEABLE
Thermometer,self-Indicating,bime
Joint Electronics Type Designation System
6685-00-663-80936-01276 INTERCHANGEABLE
Thermometer,self-Indicating,bime
Sigma Products & Mfg
4920-00-708-30242261 INTERCHANGEABLE
Cable Assy
Marvel Manufacturing Co Div the Marvel Manufacturing Company
6685-00-764-4248 INTERCHANGEABLE
Thermometer,self-Indicating,bime
5985-00-975-4038RLA150-NF INTERCHANGEABLE
Adapter,waveguide
Andrew Llc
6685-00-979-8961 INTERCHANGEABLE
Thermometer,self-Indicating,bime
Cross-Reference Index
Part NumberManufacturer
2-261S604-70 PRIMARY Parker-Hannifin Corp Div O-Ring Division (USA)
2-261 Sta-Warm Electric Co (USA)
Related Parts
4820-00-069-9049INTERCHANGEABLE
SEAT,VALVE
2261
6685-00-174-6239INTERCHANGEABLE
THERMOMETER,SELF-INDICATING,BIME
2261-08000QF
4920-00-257-5095INTERCHANGEABLE
ACCESSORY KIT,TEST SET
2261
9390-00-290-4021INTERCHANGEABLE
NONMETALLIC SPECIAL SHAPED SECTI
6685-00-521-0656INTERCHANGEABLE
THERMOMETER,SELF-INDICATING,BIME
PH660U
6685-00-663-8093INTERCHANGEABLE
THERMOMETER,SELF-INDICATING,BIME
6-01276
4920-00-708-3024INTERCHANGEABLE
CABLE ASSY
2261
6685-00-764-4248INTERCHANGEABLE
THERMOMETER,SELF-INDICATING,BIME
5985-00-975-4038INTERCHANGEABLE
ADAPTER,WAVEGUIDE
RLA150-NF
6685-00-979-8961INTERCHANGEABLE
THERMOMETER,SELF-INDICATING,BIME
5331-01-106-7286INTERCHANGEABLE
O-RING
MS28775-261
5950-01-233-2498INTERCHANGEABLE
TRANSFORMER,CURRENT
2261

Frequently Asked Questions

What is NSN 5331-00-999-8565?

NSN 5331-00-999-8565 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-999-8565?

NSN 5331-00-999-8565 has 2 cross-referenced part numbers: 2-261S604-70 (Parker-Hannifin Corp Div O-Ring Division), 2-261 (Sta-Warm Electric Co).

What NSN replaces 5331-00-999-8565?

There are 12 known substitutes for 5331-00-999-8565: 4820-00-069-9049, 6685-00-174-6239, 4920-00-257-5095 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2-261S604-70?

Key specifications for 2-261S604-70: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Center Hole Diameter: 6.711 INCHES MINIMUM AND 6.757 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL. 6 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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