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PartsTable / COMPONENT / MFF18T220941B
MFF18T220941B ✓ 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 PACKING SPECIAL is a the manufacturer industrial component. Key specifications include nondefinitive_spec/std_data: 1 TYPE AND 1 CLASS AND 70 GRADE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-153-1041, 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
MFF18T220941B
NSN: 5330-00-153-1041
FSC: 5330
CAGE: 91637 — VISHAY DALE ELECTRONICS, LLC DIV VISHAY AMERICAS (USA)
SPECIFICATIONS
nondefinitive_spec/std_data1 TYPE AND 1 CLASS AND 70 GRADE
NSN5330-00-153-1041
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MFF18T220941B 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
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 1 CLASS AND 70 GRADE
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 1 CLASS AND 70 GRADE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
MIL-R-25988BInterchangeable
interchangeable cross-reference
interchangeable
5-818Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-25988/2Interchangeable
interchangeable cross-reference
interchangeable
M25988/2-229Interchangeable
interchangeable cross-reference
interchangeable
S9412-111Interchangeable
interchangeable cross-reference
interchangeable
M25988/2-111Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MFF18T220941B?
MFF18T220941B is a PACKING SPECIAL.
What parts can replace MFF18T220941B?
There are 18 known substitutes for MFF18T220941B: MIL-R-25988B, 5-818, MIL-DTL-25988/2 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MFF18T220941B?
MFF18T220941B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-153-1041. 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