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Technical Data Sheet
PartsTable / COMPONENT / 366937 C91
366937 C91 ✓ 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 366937 C91 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-117-9694, 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
366937 C91
NSN: 5330-01-117-9694
FSC: 5330
CAGE: 89346 — NAVISTAR INTL CORP TRUCK BR OHIO PLANT (USA)
SPECIFICATIONS
Part Number366937 C91
NSN5330-01-117-9694
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 366937 C91 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
ST752AInterchangeable
interchangeable cross-reference
interchangeable
395S-394AInterchangeable
interchangeable cross-reference
interchangeable
398G7Interchangeable
interchangeable cross-reference
interchangeable
38G42Interchangeable
interchangeable cross-reference
interchangeable
29316Interchangeable
interchangeable cross-reference
interchangeable
A29316Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 366937 C91?
366937 C91 is a 366937 C91.
What parts can replace 366937 C91?
There are 13 known substitutes for 366937 C91: ST752A, 395S-394A, 398G7 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 366937 C91?
366937 C91 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-117-9694. 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