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Technical Data Sheet
PartsTable / O-RING / G-T-443R
G-T-443R ✓ 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

The O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER, center_hole_diameter: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN, material_document_and_classification: MIL-R-83248/1, CL1 MIL SPEC SINGLE MATERIAL RESPONSE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-400-1037, 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-T-443R
NSN: 5331-01-400-1037
FSC: 5331 — O-RING
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialRUBBER
center_hole_diameter0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
material_document_and_classificationMIL-R-83248/1, CL1 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5331-01-400-1037
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: G-T-443R 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
•
MATERIAL: RUBBER
•
CENTER HOLE DIAMETER: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-83248/1, CL1 MIL SPEC SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER
CENTER HOLE DIAMETER0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-83248/1, CL1 MIL SPEC SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
B-713 R2-13Interchangeable
interchangeable cross-reference
interchangeable
FNQ-15Interchangeable
interchangeable cross-reference
interchangeable
309001-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is G-T-443R?
G-T-443R is a O-RING.
What parts can replace G-T-443R?
There are 3 known substitutes for G-T-443R: B-713 R2-13, FNQ-15, 309001-1. Substitute compatibility should be verified for your specific system.
What is the NSN for G-T-443R?
G-T-443R is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-400-1037. 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