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509P88 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

509P88: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEALING ELEMENT, case_style: SQUARE, seal_width: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN, housing_bore_diameter: 0.687 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 0.478 INCHES MINIMUM AND 0.493 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-973-8611, 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
509P88
NSN: 5330-00-973-8611
FSC: 5330 — Packing and Gasket Materials
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEALING ELEMENT
case_styleSQUARE
seal_width0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
housing_bore_diameter0.687 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
sealing_element_styleANGULAR
accommodated_shaft_diameter0.478 INCHES MINIMUM AND 0.493 INCHES MAXIMUM IN
NSN5330-00-973-8611
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 509P88 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
•
SEAL WIDTH: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
•
SEALING ELEMENT STYLE: ANGULAR
•
HOUSING BORE DIAMETER: 0.687 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 0.478 INCHES MINIMUM AND 0.493 INCHES MAXIMUM IN
•
MATERIAL: STEEL CASE
TECHNICAL CHARACTERISTICS
SEAL WIDTH0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
SEALING ELEMENT STYLEANGULAR
HOUSING BORE DIAMETER0.687 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER0.478 INCHES MINIMUM AND 0.493 INCHES MAXIMUM IN
MATERIALSTEEL CASE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
SUBSTITUTES & CROSS-REFERENCES 2
5330-00-973-8611Reference document
Same NSN cross-reference
Reference document — Informative reference only
509-0088Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 509P88?
509P88 is a SEAL,PLAIN ENCASED.
What parts can replace 509P88?
There are 2 known substitutes for 509P88: 5330-00-973-8611, 509-0088. Substitute compatibility should be verified for your specific system.
What is the NSN for 509P88?
509P88 is cataloged in the U.S. Government catalog under NSN 5330-00-973-8611. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.