PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2-231C557-70O-Ring

C. E. Conover & Co., Inc. · NSN 5331-00-352-0328 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-352-0328 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-352-0328. Primary manufacturer part number: 2-231C557-70.
Features
  • O-Ring — FSC 5331
  • Center Hole Diameter: 2.599 INCHES MINIMUM AND 2.619 INCHES MAXIMUM IN
  • Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
  • Material: RUBBER CHLOROPRENE CLASS CR
  • 9 verified cross-references
  • Primary manufacturer: C. E. Conover & Co., Inc.
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Chloroprene Class Cr construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-352-0328, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is C. E. Conover & Co., Inc.. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5331-00-352-0328
Primary Part Number2-231C557-70
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerC. E. Conover & Co., Inc.
StatusCANCELLED
Center Hole Diameter2.599 INCHES MINIMUM AND 2.619 INCHES MAXIMUM IN
Cross-Sectional Height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MaterialRUBBER CHLOROPRENE CLASS CR
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5331-00-052-6805 INTERCHANGEABLE
O-Ring
5331-00-593-12822-231N951-75 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
5331-00-641-3656AS568-231 MIL-PRF-1149TYP2CL5 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
5331-01-017-6536231-8309 INTERCHANGEABLE
O-Ring
Parker Hannifin Corporation Div O-Ring Division
5331-01-486-1730AS568-231 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
2-231C557-70 PRIMARY C. E. Conover & Co., Inc. (USA)
AS568-231 Society of Automotive Engineers Inc (USA)
364313 Sierra Technologies Inc Garden City Div (USA)
AMS32092231C557 -7 Zf Industrieantriebe Witten Gmbh (DEU)
AMS3209 Society of Automotive Engineers Inc (USA)
2-231C557-7 Zf Industrieantriebe Witten Gmbh (DEU)
AMS3209 Sae International Dba Sae International (USA)
AS568-231 Sae International Dba Sae International (USA)
2-231C147-70 Parker-Hannifin Corp Div O-Ring Division (USA)
Related Parts
5331-00-052-6805INTERCHANGEABLE
O-RING
5331-00-593-1282INTERCHANGEABLE
O-RING
2-231N951-75
5331-00-641-3656INTERCHANGEABLE
O-RING
AS568-231 MIL-PRF-1149TYP2CL5
5331-01-017-6536INTERCHANGEABLE
O-RING
231-8309
5331-01-486-1730INTERCHANGEABLE
O-RING
AS568-231

Frequently Asked Questions

What is NSN 5331-00-352-0328?

NSN 5331-00-352-0328 is a O-Ring, manufactured by C. E. Conover & Co., Inc., classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-352-0328?

NSN 5331-00-352-0328 has 9 cross-referenced part numbers: 2-231C557-70 (C. E. Conover & Co., Inc.), AS568-231 (Society of Automotive Engineers Inc), 364313 (Sierra Technologies Inc Garden City Div), AMS32092231C557 -7 (Zf Industrieantriebe Witten Gmbh), AMS3209 (Society of Automotive Engineers Inc) and 4 more.

What NSN replaces 5331-00-352-0328?

There are 5 known substitutes for 5331-00-352-0328: 5331-00-052-6805, 5331-00-593-1282, 5331-00-641-3656 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2-231C557-70?

Key specifications for 2-231C557-70: Center Hole Diameter: 2.599 INCHES MINIMUM AND 2.619 INCHES MAXIMUM IN; Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Material: RUBBER CHLOROPRENE CLASS CR. 3 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5331-00-352-0328 still in active supply?

NSN 5331-00-352-0328 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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