PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51000-7O-Ring

Marvel Engineering Company Inc · NSN 5331-00-441-9855 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-441-9855 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-441-9855. Primary manufacturer part number: 51000-7.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
  • Material: RUBBER
  • Center Hole Diameter: 1.228 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
  • 2 verified cross-references
  • Primary manufacturer: Marvel Engineering Company Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-441-9855, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Marvel Engineering Company Inc. Government technical data includes 3 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5331-00-441-9855
Primary Part Number51000-7
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerMarvel Engineering Company Inc
StatusCANCELLED
Cross-Sectional Height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MaterialRUBBER
Center Hole Diameter1.228 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5310-00-924-5897 INTERCHANGEABLE
Nut,plain,hexagon
3130-01-550-7052 INTERCHANGEABLE
Bearing Unit,plain
5331-01-560-6772510-007 INTERCHANGEABLE
O-Ring
Kirby Morgan Dive Systems Inc
3530-01-564-6232510007 INTERCHANGEABLE
Bobbin,sewing Machine
Singer Industrial Sewing Products Co Cutters Exchange Div
6210-01-701-8429510007 INTERCHANGEABLE
Lens,light
Betts Industries, Inc.
Cross-Reference Index
Part NumberManufacturer
A27577 Cnh Industrial America Llc Dba Cnh America (USA)
51000-7 PRIMARY Marvel Engineering Company Inc (USA)
Related Parts
5310-00-924-5897INTERCHANGEABLE
NUT,PLAIN,HEXAGON
3130-01-550-7052INTERCHANGEABLE
BEARING UNIT,PLAIN
5331-01-560-6772INTERCHANGEABLE
O-RING
510-007
3530-01-564-6232INTERCHANGEABLE
BOBBIN,SEWING MACHINE
510007
6210-01-701-8429INTERCHANGEABLE
LENS,LIGHT
510007

Frequently Asked Questions

What is NSN 5331-00-441-9855?

NSN 5331-00-441-9855 is a O-Ring, manufactured by Marvel Engineering Company Inc, classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-441-9855?

NSN 5331-00-441-9855 has 2 cross-referenced part numbers: A27577 (Cnh Industrial America Llc Dba Cnh America), 51000-7 (Marvel Engineering Company Inc).

What NSN replaces 5331-00-441-9855?

There are 5 known substitutes for 5331-00-441-9855: 5310-00-924-5897, 3130-01-550-7052, 5331-01-560-6772 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51000-7?

Key specifications for 51000-7: Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Material: RUBBER; Center Hole Diameter: 1.228 INCHES MINIMUM AND 1.240 INCHES MAXIMUM IN. 3 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5331-00-441-9855 still in active supply?

NSN 5331-00-441-9855 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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