PartsTable
Technical Data Sheet
91786-991 ✓ 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 SEAL,PLAIN ENCASED 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 5330-01-168-1504, 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
91786-991
NSN: 5330-01-168-1504
FSC: 5330
CAGE: 0BAT5 — U.S. DEFENSE SERVICES, INC. DBA USDS (USA)
SPECIFICATIONS
Part Number91786-991
NSN5330-01-168-1504
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 91786-991 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 7
722598-11Interchangeable
interchangeable cross-reference
interchangeable
722598-011Interchangeable
interchangeable cross-reference
interchangeable
5904480-4Interchangeable
interchangeable cross-reference
interchangeable
010023Interchangeable
interchangeable cross-reference
interchangeable
445-9936Interchangeable
Same NIIN cross-reference
interchangeable
3536704-801Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 91786-991?
91786-991 is a SEAL,PLAIN ENCASED.
What parts can replace 91786-991?
There are 7 known substitutes for 91786-991: 722598-11, 722598-011, 5904480-4 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 91786-991?
91786-991 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-168-1504. This indicates validated use in U.S. government and defense supply chains.
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