PartsTable
Technical Data Sheet
PartsTable / O-RING / 1820-18
1820-18 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include peripheral_diameter: 1.181 INCHES MINIMUM AND 1.217 INCHES MAXIMUM IN, center_hole_diameter: 0.915 INCHES MINIMUM AND 0.927 INCHES MAXIMUM IN, elongation_percentage: 164 MAXIMUM, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-054-6937, 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
1820-18
NSN: 5331-00-054-6937
FSC: 5331 — O-RING
CAGE: 81168 — STROHMEYER, JULIE A. DBA JULIE A. STROHMEYER (USA)
SPECIFICATIONS
peripheral_diameter1.181 INCHES MINIMUM AND 1.217 INCHES MAXIMUM IN
center_hole_diameter0.915 INCHES MINIMUM AND 0.927 INCHES MAXIMUM IN
elongation_percentage164 MAXIMUM
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-00-054-6937
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1820-18 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
•
ELONGATION PERCENTAGE: 160 MAXIMUM
•
CENTER HOLE DIAMETER: 0.915 INCHES MINIMUM AND 0.927 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
TECHNICAL CHARACTERISTICS (FLIS)
ELONGATION PERCENTAGE160 MAXIMUM
CENTER HOLE DIAMETER0.915 INCHES MINIMUM AND 0.927 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
54800127Interchangeable
interchangeable cross-reference
interchangeable
DM8560NInterchangeable
interchangeable cross-reference
interchangeable
200-034Interchangeable
interchangeable cross-reference
interchangeable
S718Interchangeable
interchangeable cross-reference
interchangeable
MILP5516Interchangeable
interchangeable cross-reference
interchangeable
5330000546935Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1820-18?
1820-18 is a O-RING.
What parts can replace 1820-18?
There are 28 known substitutes for 1820-18: 54800127, DM8560N, 200-034 and 25 more. Substitute compatibility should be verified for your specific system.
Is 1820-18 still available?
1820-18 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