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Technical Data Sheet
PartsTable / O-RING / MB-74 FIND NO. 133CP
MB-74 FIND NO. 133CP ✓ 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 MB-74 FIND NO. 133CP 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 5331-01-593-5756, 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
MB-74 FIND NO. 133CP
NSN: 5331-01-593-5756
FSC: 5331 — O-RING
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part NumberMB-74 FIND NO. 133CP
NSN5331-01-593-5756
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MB-74 FIND NO. 133CP 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
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D.
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
CROSS-SECTIONAL HEIGHT: 0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 1.461 INCHES MINIMUM AND 1.489 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
END ITEM IDENTIFICATIONDRY DECK SHELTER O2 PRESSURE REDUCING MANIFOLD (MB-74)
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSCLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D.
MATERIALRUBBER FLUOROCARBON CLASS FPM
CRITICALITY CODE JUSTIFICATIONZZZY
CROSS-SECTIONAL HEIGHT0.114 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN
CENTER HOLE DIAMETER1.461 INCHES MINIMUM AND 1.489 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
5331001651977Interchangeable
interchangeable cross-reference
interchangeable
D11200FF ITEM 33Interchangeable
interchangeable cross-reference
interchangeable
J221P920Interchangeable
interchangeable cross-reference
interchangeable
D4200 ITEM 3Interchangeable
interchangeable cross-reference
interchangeable
A6689.023.222CPInterchangeable
interchangeable cross-reference
interchangeable
M83248/1-023CPInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MB-74 FIND NO. 133CP?
MB-74 FIND NO. 133CP is a MB-74 FIND NO. 133CP.
What parts can replace MB-74 FIND NO. 133CP?
There are 13 known substitutes for MB-74 FIND NO. 133CP: 5331001651977, D11200FF ITEM 33, J221P920 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MB-74 FIND NO. 133CP?
MB-74 FIND NO. 133CP is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-593-5756. 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