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Technical Data Sheet
PartsTable / COMPONENT / 26-29XX-XXXXA020-028
26-29XX-XXXXA020-028 ✓ 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

CAP,PROTECTIVE,DUST AND MOISTURE. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-633-7522, 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
26-29XX-XXXXA020-028
NSN: 5340-01-633-7522
FSC: 5340
CAGE: 13669 — TESCOM CORP DBA TESCOM DIV TESCOM (USA)
SPECIFICATIONS
Part Number26-29XX-XXXXA020-028
NSN5340-01-633-7522
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 26-29XX-XXXXA020-028 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
81439Interchangeable
interchangeable cross-reference
interchangeable
50074Interchangeable
interchangeable cross-reference
interchangeable
69657Interchangeable
interchangeable cross-reference
interchangeable
50622Interchangeable
interchangeable cross-reference
interchangeable
460-872Interchangeable
interchangeable cross-reference
interchangeable
81439-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26-29XX-XXXXA020-028?
26-29XX-XXXXA020-028 is a CAP,PROTECTIVE,DUST AND MOISTURE.
What parts can replace 26-29XX-XXXXA020-028?
There are 12 known substitutes for 26-29XX-XXXXA020-028: 81439, 50074, 69657 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26-29XX-XXXXA020-028?
26-29XX-XXXXA020-028 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-633-7522. 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