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PartsTable / COMPONENT / 18Z728
18Z728 ✓ 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. Key specifications include material: RUBBER SYNTHETIC SEALING ELEMENT, case_style: SQUARE, seal_width: 0.750 INCHES NOMINAL IN, housing_bore_diameter: 10.000 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 8.500 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 5330-00-904-8906, 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
18Z728
NSN: 5330-00-904-8906
FSC: 5330
CAGE: 27315 — MORRIS MATERIAL HANDLING, INC. (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEALING ELEMENT
case_styleSQUARE
seal_width0.750 INCHES NOMINAL IN
housing_bore_diameter10.000 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter8.500 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed3000 FEET PER MINUTE FT
NSN5330-00-904-8906
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 18Z728 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
•
ACCOMMODATED SHAFT DIAMETER: 8.500 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 10.000 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 3000 FEET PER MINUTE FT
•
SEALING ELEMENT STYLE: ANGULAR
•
CASE STYLE: SQUARE
•
MATERIAL: STEEL CASE
•
SEAL WIDTH: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
ACCOMMODATED SHAFT DIAMETER8.500 INCHES NOMINAL IN
HOUSING BORE DIAMETER10.000 INCHES NOMINAL IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED3000 FEET PER MINUTE FT
SEALING ELEMENT STYLEANGULAR
CASE STYLESQUARE
MATERIALSTEEL CASE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
SEAL WIDTH0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
554895Interchangeable
interchangeable cross-reference
interchangeable
244-287Interchangeable
interchangeable cross-reference
interchangeable
5489Interchangeable
interchangeable cross-reference
interchangeable
305489Interchangeable
interchangeable cross-reference
interchangeable
455489Interchangeable
Same NIIN cross-reference
interchangeable
00044 TY 1 CASE TY 2B ELEMENTInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18Z728?
18Z728 is a SEAL,PLAIN ENCASED.
What parts can replace 18Z728?
There are 7 known substitutes for 18Z728: 554895, 244-287, 5489 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 18Z728?
18Z728 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-904-8906. 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