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Technical Data Sheet
PartsTable / COMPONENT / 1820-66
1820-66 ✓ 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 PLATE,ORIFICE,FLUID is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 6.973 INCHES MINIMUM AND 7.077 INCHES MAXIMUM IN, center_hole_diameter: 6.452 INCHES MINIMUM AND 6.498 INCHES MAXIMUM IN, cross-sectional_height: 0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-361-5425, 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
1820-66
NSN: 5330-00-361-5425
FSC: 5330
CAGE: U0189 — TURNER ENGINE CONTROLS, A DIVISION OF TURNER DIESEL (GBR)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter6.973 INCHES MINIMUM AND 7.077 INCHES MAXIMUM IN
center_hole_diameter6.452 INCHES MINIMUM AND 6.498 INCHES MAXIMUM IN
cross-sectional_height0.269 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
NSN5330-00-361-5425
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1820-66 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
•
SEALING ELEMENT STYLE: ANGULAR
•
MATERIAL: STEEL CORROSION RESISTING CASE
•
SURFACE TREATMENT: OXIDE CASE
•
CASE STYLE: RECESSED
•
SEAL WIDTH: 0.250 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 0.750 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT DIAMETER: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SEALING ELEMENT STYLEANGULAR
MATERIALSTEEL CORROSION RESISTING CASE
SURFACE TREATMENTOXIDE CASE
CASE STYLERECESSED
SEAL WIDTH0.250 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
HOUSING BORE DIAMETER0.750 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER0.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
890663Interchangeable
interchangeable cross-reference
interchangeable
2594Interchangeable
interchangeable cross-reference
interchangeable
ASTM-D5168Interchangeable
interchangeable cross-reference
interchangeable
PPP-B-640 STGCLWEATHER RESISTANTInterchangeable
interchangeable cross-reference
interchangeable
M155I-100Interchangeable
interchangeable cross-reference
interchangeable
A-A-59282Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1820-66?
1820-66 is a PLATE,ORIFICE,FLUID.
What parts can replace 1820-66?
There are 22 known substitutes for 1820-66: 890663, 2594, ASTM-D5168 and 19 more. Substitute compatibility should be verified for your specific system.
Is 1820-66 still available?
1820-66 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026