PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS1611-129O-Ring

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5331-00-127-2521 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-127-2521 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-127-2521. Primary manufacturer part number: NAS1611-129.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
  • Material: RUBBER ETHYLENE-PROPYLENE CLASS EPM
  • Center Hole Diameter: 1.534 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN
  • 4 verified cross-references
  • Primary manufacturer: National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Ethylene-Propylene Class Epm construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-127-2521, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 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
NSN5331-00-127-2521
Primary Part NumberNAS1611-129
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusACTIVE
Cross-Sectional Height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
MaterialRUBBER ETHYLENE-PROPYLENE CLASS EPM
Center Hole Diameter1.534 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5331-00-492-0575707524-129 INTERCHANGEABLE
O-Ring
Wintec Llc
5331-01-014-2604NAS1611-118 INTERCHANGEABLE
O-Ring
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5331-01-044-2310NAS1611-009 INTERCHANGEABLE
O-Ring
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5330-01-053-3994 INTERCHANGEABLE
Packing,preformed
5331-01-176-2014L0515 2-153 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corp Div O-Ring Division
5331-01-192-66232-166E515-80 INTERCHANGEABLE
O-Ring
Parker-Hannifin Corp Div O-Ring Division
5331-01-287-4834 INTERCHANGEABLE
O-Ring
5331-01-288-7155 INTERCHANGEABLE
O-Ring
5331-01-302-2308NAS1611-155A INTERCHANGEABLE
O-Ring
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5331-01-365-1069NAS1611-146A INTERCHANGEABLE
O-Ring
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
NAS1611-129 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
5331PL2182391 Jednolity Indeks Materialowy - Uniform Material Index (POL)
NAS1613 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
NAS1611 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
Related Parts
5331-00-492-0575INTERCHANGEABLE
O-RING
707524-129
5331-01-014-2604INTERCHANGEABLE
O-RING
NAS1611-118
5331-01-044-2310INTERCHANGEABLE
O-RING
NAS1611-009
5330-01-053-3994INTERCHANGEABLE
PACKING,PREFORMED
5331-01-176-2014INTERCHANGEABLE
O-RING
L0515 2-153
5331-01-192-6623INTERCHANGEABLE
O-RING
2-166E515-80
5331-01-287-4834INTERCHANGEABLE
O-RING
5331-01-288-7155INTERCHANGEABLE
O-RING
5331-01-302-2308INTERCHANGEABLE
O-RING
NAS1611-155A
5331-01-365-1069INTERCHANGEABLE
O-RING
NAS1611-146A
5331-01-451-5081INTERCHANGEABLE
O-RING
NAS1611-365
5331-01-451-8572INTERCHANGEABLE
O-RING
NAS1611-266A

Frequently Asked Questions

What is NSN 5331-00-127-2521?

NSN 5331-00-127-2521 is a O-Ring, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-127-2521?

NSN 5331-00-127-2521 has 4 cross-referenced part numbers: NAS1611-129 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), 5331PL2182391 (Jednolity Indeks Materialowy - Uniform Material Index), NAS1613 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), NAS1611 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use).

What NSN replaces 5331-00-127-2521?

There are 12 known substitutes for 5331-00-127-2521: 5331-00-492-0575, 5331-01-014-2604, 5331-01-044-2310 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS1611-129?

Key specifications for NAS1611-129: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Material: RUBBER ETHYLENE-PROPYLENE CLASS EPM; Center Hole Diameter: 1.534 INCHES MINIMUM AND 1.564 INCHES MAXIMUM IN. 3 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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