PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

26-256O-Ring

Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc · NSN 5331-01-319-4819 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-319-4819 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-319-4819. Primary manufacturer part number: 26-256.
Features
  • O-Ring — FSC 5331
  • 2 verified cross-references
  • Primary manufacturer: Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-319-4819, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersOrtman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc (CAGE 91940)
Technical Specifications
ParameterValue
NSN5331-01-319-4819
Primary Part Number26-256
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerOrtman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
3830-00-447-65410126256 INTERCHANGEABLE
Cap,outer Bearing
New Holland Construction
5855-01-542-785426256 INTERCHANGEABLE
Cap,lens
Charles Reed Knight Jr Dba Knight's Armament Company
Cross-Reference Index
Part NumberManufacturer
D-547948 ITEM 30 Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc (USA)
26-256 PRIMARY Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc (USA)
Related Parts
3830-00-447-6541INTERCHANGEABLE
CAP,OUTER BEARING
0126256
5855-01-542-7854INTERCHANGEABLE
CAP,LENS
26256

Frequently Asked Questions

What is NSN 5331-01-319-4819?

NSN 5331-01-319-4819 is a O-Ring, manufactured by Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-319-4819?

NSN 5331-01-319-4819 has 2 cross-referenced part numbers: D-547948 ITEM 30 (Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc), 26-256 (Ortman Fluid Power Quincy Compressor Div Sub of Coltec Industries Inc).

What NSN replaces 5331-01-319-4819?

There are 2 known substitutes for 5331-01-319-4819: 3830-00-447-6541, 5855-01-542-7854. Verify interchangeability with system specifications before substitution.

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