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Technical Data Sheet
PartsTable / O-RING / G-263
G-263 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

REFRIGERATOR-FREEZER,MECHANICAL. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, overall_width: 30.000 INCHES NOMINAL IN, overall_height: 60.000 INCHES NOMINAL IN, cross-sectional_height: 0.125 INCHES NOMINAL IN, specification/standard_data: 81349-MIL-M-22520/3-11 GOVERNMENT SPECIFICATION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-034-2378, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
G-263
NSN: 5331-00-034-2378
FSC: 5331 — O-RING
CAGE: 08302 — PACCAR WINCH INC DBA PACCAR WINCH DIVISION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
overall_width30.000 INCHES NOMINAL IN
overall_height60.000 INCHES NOMINAL IN
cross-sectional_height0.125 INCHES NOMINAL IN
specification/standard_data81349-MIL-M-22520/3-11 GOVERNMENT SPECIFICATION
general_characteristics_item_descriptionOUTSIDE SHELL MATERIAL: STEEL; 14.000 CUBIC FEET NOMINAL REFRIGERATED STORAGE; OVERALL DEPTH IS 30 IN.;115 VOLTS;50/60 HZ IN
NSN5331-00-034-2378
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: G-263 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL HEIGHT: 0.125 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL HEIGHT0.125 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
65X910Interchangeable
interchangeable cross-reference
interchangeable
51X910Interchangeable
interchangeable cross-reference
interchangeable
00044Interchangeable
interchangeable cross-reference
interchangeable
5033-4Interchangeable
interchangeable cross-reference
interchangeable
127W/-260HInterchangeable
interchangeable cross-reference
interchangeable
10015372Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is G-263?
G-263 is a REFRIGERATOR-FREEZER,MECHANICAL.
What parts can replace G-263?
There are 19 known substitutes for G-263: 65X910, 51X910, 00044 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for G-263?
G-263 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-034-2378. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026