PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILP5516CLASSBO-Ring

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5331-00-231-3233 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-231-3233 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-231-3233. Primary manufacturer part number: MILP5516CLASSB.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.125 INCHES NOMINAL IN
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
  • 1 verified cross-reference
  • Primary manufacturer: Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Butadiene-Acrylonitrile Class Nbr construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-231-3233, is classified within Federal Supply Class 5331 (O-Ring) 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 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-00-231-3233
Primary Part NumberMILP5516CLASSB
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Cross-Sectional Height0.125 INCHES NOMINAL IN
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5331-00-171-3859223227 INTERCHANGEABLE
O-Ring
Kearfott Corporation Div Guidance and Navigation Division
5331-00-231-3220 INTERCHANGEABLE
O-Ring
5331-00-292-0639575-9600-1444256REVAPC37 INTERCHANGEABLE
O-Ring
Naval Ship Systems Command
5331-00-297-3611 INTERCHANGEABLE
O-Ring
5331-00-599-21424268-45REVAPC26SH2 INTERCHANGEABLE
O-Ring
Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility
5330-00-632-76336327633 INTERCHANGEABLE
Packing,preformed
U S Army Tank Automotive Command Amsta-Im-Mm
5330-00-726-2481903-7117 INTERCHANGEABLE
Packing,preformed
Parker Hannifin Corporation Div O-Ring Division
5331-00-884-2491805023-17 INTERCHANGEABLE
O-Ring
L3harris Cincinnati Electronics Corporation
5331-00-892-194325176 INTERCHANGEABLE
O-Ring
Eaton Corporation Dba Eaton Inoac Div Eaton
5331-01-183-0985M83461/1-427 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
MILP5516CLASSB Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5331-00-171-3859INTERCHANGEABLE
O-RING
223227
5331-00-231-3220INTERCHANGEABLE
O-RING
5331-00-292-0639INTERCHANGEABLE
O-RING
575-9600-1444256REVAPC37
5331-00-297-3611INTERCHANGEABLE
O-RING
5331-00-599-2142INTERCHANGEABLE
O-RING
4268-45REVAPC26SH2
5330-00-632-7633INTERCHANGEABLE
PACKING,PREFORMED
6327633
5330-00-726-2481INTERCHANGEABLE
PACKING,PREFORMED
903-7117
5331-00-884-2491INTERCHANGEABLE
O-RING
805023-17
5331-00-892-1943INTERCHANGEABLE
O-RING
25176
5331-01-183-0985INTERCHANGEABLE
O-RING
M83461/1-427

Frequently Asked Questions

What is NSN 5331-00-231-3233?

NSN 5331-00-231-3233 is a O-Ring, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-231-3233?

NSN 5331-00-231-3233 has 1 cross-referenced part number: MILP5516CLASSB (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5331-00-231-3233?

There are 10 known substitutes for 5331-00-231-3233: 5331-00-171-3859, 5331-00-231-3220, 5331-00-292-0639 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILP5516CLASSB?

Key specifications for MILP5516CLASSB: Cross-Sectional Height: 0.125 INCHES NOMINAL IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 2 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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