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66988 ✓ Verified by PartsTable
Clementoni · 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 Clementoni industrial component. Key specifications include case_style: RECESSED, seal_width: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN, temp_rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF, sealing_element_style: VERTICAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-143-8790, 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
66988
NSN: 5330-00-143-8790
FSC: 5330
CAGE: 93835 — PARKER HANNIFIN CORPORATION DIV HYDRAULIC SYSTEMS DIVISION (USA)
SPECIFICATIONS
case_styleRECESSED
seal_width0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
sealing_element_styleVERTICAL
NSN5330-00-143-8790
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 66988 MFR: Clementoni ⚠ 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
•
SEAL WIDTH: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
SEALING ELEMENT STYLE: VERTICAL
•
CASE STYLE: RECESSED
TECHNICAL CHARACTERISTICS (FLIS)
SEAL WIDTH0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
SEALING ELEMENT STYLEVERTICAL
CASE STYLERECESSED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
19503Interchangeable
interchangeable cross-reference
interchangeable
26423Interchangeable
interchangeable cross-reference
interchangeable
M-33Interchangeable
interchangeable cross-reference
interchangeable
752B0002CH14Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66988?
66988 is a SEAL,PLAIN ENCASED manufactured by Clementoni.
What parts can replace 66988?
There are 4 known substitutes for 66988: 19503, 26423, M-33 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 66988?
66988 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-143-8790. 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