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Technical Data Sheet
PartsTable / COMPONENT / R-8-9-1
R-8-9-1 ✓ 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 RING ASSEMBLY,OPERATING is a the manufacturer industrial component. Key specifications include overall_width: 3.5000 INCHES NOMINAL IN, overall_height: 1.5000 INCHES NOMINAL IN, overall_length: 10.0000 INCHES NOMINAL IN, end_item_identification: W/S:ADVANCED AIR TRAFFIC CONTR. & LAND.

SYS (ATCALS) 404L;, general_characteristics_item_description: STEEL. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-274-3219, 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
R-8-9-1
NSN: 5340-00-274-3219
FSC: 5340
CAGE: 77554 — RELIANCE COMM/TEC CORP RELIABLE ELECTRIC DIV UTILITY PRODUCTS (USA)
SPECIFICATIONS
overall_width3.5000 INCHES NOMINAL IN
overall_height1.5000 INCHES NOMINAL IN
overall_length10.0000 INCHES NOMINAL IN
end_item_identificationW/S:ADVANCED AIR TRAFFIC CONTR. & LAND. SYS (ATCALS) 404L;
general_characteristics_item_descriptionSTEEL
NSN5340-00-274-3219
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: R-8-9-1 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
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT1.5000 INCHES NOMINAL IN
END ITEM IDENTIFICATIONW/S:ADVANCED AIR TRAFFIC CONTR. & LAND. SYS (ATCALS) 404L;
OVERALL WIDTH3.5000 INCHES NOMINAL IN
OVERALL LENGTH10.0000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
77071Interchangeable
interchangeable cross-reference
interchangeable
A148077071Interchangeable
interchangeable cross-reference
interchangeable
89ERESIST0RInterchangeable
interchangeable cross-reference
interchangeable
89EInterchangeable
interchangeable cross-reference
interchangeable
89BARESIST0RInterchangeable
interchangeable cross-reference
interchangeable
89BAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R-8-9-1?
R-8-9-1 is a RING ASSEMBLY,OPERATING.
What parts can replace R-8-9-1?
There are 18 known substitutes for R-8-9-1: 77071, A148077071, 89ERESIST0R and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R-8-9-1?
R-8-9-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-274-3219. 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