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Technical Data Sheet
PartsTable / COMPONENT / MT-6998/USM
MT-6998/USM ✓ 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 MT-6998/USM 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 5340-01-467-3546, 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
MT-6998/USM
NSN: 5340-01-467-3546
FSC: 5340
CAGE: 80058 — JOINT ELECTRONICS TYPE DESIGNATION SYSTEM (USA)
SPECIFICATIONS
Part NumberMT-6998/USM
NSN5340-01-467-3546
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MT-6998/USM 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
•
CRITICALITY CODE JUSTIFICATION: AGAV
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONFLEET ELECTRONIC WARFARE SUPPORT GROUP
CRITICALITY CODE JUSTIFICATIONAGAV
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
9M2616Interchangeable
interchangeable cross-reference
interchangeable
6F4927Interchangeable
interchangeable cross-reference
interchangeable
7076692Interchangeable
interchangeable cross-reference
interchangeable
6-426Interchangeable
interchangeable cross-reference
interchangeable
291102C91Interchangeable
interchangeable cross-reference
interchangeable
15160Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MT-6998/USM?
MT-6998/USM is a MT-6998/USM.
What parts can replace MT-6998/USM?
There are 7 known substitutes for MT-6998/USM: 9M2616, 6F4927, 7076692 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MT-6998/USM?
MT-6998/USM is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-467-3546. 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