PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

G263O-Ring

Paccar Winch Inc Dba Paccar Winch Division · NSN 5331-00-034-2378 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-034-2378 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-034-2378. Primary manufacturer part number: G263.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.125 INCHES NOMINAL IN
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
  • 3 verified cross-references
  • Primary manufacturer: Paccar Winch Inc Dba Paccar Winch Division
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 5331-00-034-2378, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Paccar Winch Inc Dba Paccar Winch Division. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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
NSN5331-00-034-2378
Primary Part NumberG263
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerPaccar Winch Inc Dba Paccar Winch Division
StatusACTIVE
Cross-Sectional Height0.125 INCHES NOMINAL IN
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-285-840021158-0910 INTERCHANGEABLE
Seal,plain Encased
Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc
4730-00-541-86805033-4 INTERCHANGEABLE
Packing Nut
Columbus Jack Corporation Div Columbus Jack
5940-00-552-36361246234-1 INTERCHANGEABLE
Terminal,lug
Honeywell Intl Inc Defense Avionics Systems
5360-00-598-4964SCB69337-7 INTERCHANGEABLE
Spring,helical,extension
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
1680-00-630-744350334 INTERCHANGEABLE
Parts Kit,actuator,
Meggitt North Hollywood Inc
2930-00-834-09338334 INTERCHANGEABLE
Pump,cooling System,engine
Elgin Industries Inc. Dba
5940-01-020-087250334 INTERCHANGEABLE
Terminal,lug
Te Connectivity Corporation
5220-01-151-5831M22520/3-11 INTERCHANGEABLE
Gage,crimping Tool
Sae International Dba Sae International
5995-01-182-7125080-080-001 INTERCHANGEABLE
Cable Assembly
Parker-Hannifin Corporation Dba Pneutronics Div Fluid Systems Division
4110-01-204-2673G-263 INTERCHANGEABLE
Refrigerator-Freezer,mechanical
Defense Medical Standardization Board
Cross-Reference Index
Part NumberManufacturer
50334 Paccar Winch Inc Dba Paccar Winch Division (USA)
G263 PRIMARY Paccar Winch Inc Dba Paccar Winch Division (USA)
BS263 Ludowici Limited (AUS)
Related Parts
5330-00-285-8400INTERCHANGEABLE
SEAL,PLAIN ENCASED
21158-0910
4730-00-541-8680INTERCHANGEABLE
PACKING NUT
5033-4
5940-00-552-3636INTERCHANGEABLE
TERMINAL,LUG
1246234-1
5360-00-598-4964INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
SCB69337-7
1680-00-630-7443INTERCHANGEABLE
PARTS KIT,ACTUATOR,
50334
2930-00-834-0933INTERCHANGEABLE
PUMP,COOLING SYSTEM,ENGINE
8334
5940-01-020-0872INTERCHANGEABLE
TERMINAL,LUG
50334
5220-01-151-5831INTERCHANGEABLE
GAGE,CRIMPING TOOL
M22520/3-11
5995-01-182-7125INTERCHANGEABLE
CABLE ASSEMBLY
080-080-001
4110-01-204-2673INTERCHANGEABLE
REFRIGERATOR-FREEZER,MECHANICAL
G-263
6150-01-616-0865INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
50334
5220-01-659-5067INTERCHANGEABLE
GAGE,PLUG,PLAIN CYLINDRICAL
G263

Frequently Asked Questions

What is NSN 5331-00-034-2378?

NSN 5331-00-034-2378 is a O-Ring, manufactured by Paccar Winch Inc Dba Paccar Winch Division, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-034-2378?

NSN 5331-00-034-2378 has 3 cross-referenced part numbers: 50334 (Paccar Winch Inc Dba Paccar Winch Division), G263 (Paccar Winch Inc Dba Paccar Winch Division), BS263 (Ludowici Limited).

What NSN replaces 5331-00-034-2378?

There are 12 known substitutes for 5331-00-034-2378: 5330-00-285-8400, 4730-00-541-8680, 5940-00-552-3636 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of G263?

Key specifications for G263: 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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