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Technical Data Sheet
1255PC74085B ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: CELLULOSE OVERALL, hole_diameter: 0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 4.484 INCHES NOMINAL IN, overall_length: 23.875 INCHES NOMINAL IN, bearing_surface_width: 0.813 INCHES NOMINAL IN, cross-sectional_thickness: 0.031 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-172-2028, 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
1255PC74085B
NSN: 5330-00-172-2028
FSC: 5330
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
materialCELLULOSE OVERALL
hole_diameter0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width4.484 INCHES NOMINAL IN
overall_length23.875 INCHES NOMINAL IN
bearing_surface_width0.813 INCHES NOMINAL IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN5330-00-172-2028
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1255PC74085B 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
CROSS-SECTIONAL THICKNESS: 0.031 INCHES NOMINAL IN
BEARING SURFACE WIDTH: 0.813 INCHES NOMINAL IN
MATERIAL: CELLULOSE OVERALL
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
HOLE DIAMETER: 0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
BEARING SURFACE WIDTH0.813 INCHES NOMINAL IN
OVERALL LENGTH23.875 INCHES NOMINAL IN
OVERALL WIDTH4.484 INCHES NOMINAL IN
MATERIALCELLULOSE OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
HOLE DIAMETER0.437 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
20505Interchangeable
interchangeable cross-reference
interchangeable
U-533984Interchangeable
interchangeable cross-reference
interchangeable
110 1-21/64Interchangeable
interchangeable cross-reference
interchangeable
2410 1-21/64Interchangeable
interchangeable cross-reference
interchangeable
1302Interchangeable
interchangeable cross-reference
interchangeable
H77155-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1255PC74085B?
1255PC74085B is a GASKET.
What parts can replace 1255PC74085B?
There are 25 known substitutes for 1255PC74085B: 20505, U-533984, 110 1-21/64 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1255PC74085B?
1255PC74085B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-172-2028. This indicates validated use in U.S. government and defense supply chains.
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