PartsTable
Technical Data Sheet
SMB186990 ✓ 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 BRACKET is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-701-6359, 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
SMB186990
NSN: 5340-00-701-6359
FSC: 5340
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
Part NumberSMB186990
NSN5340-00-701-6359
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SMB186990 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 5
549Interchangeable
interchangeable cross-reference
interchangeable
05894512Interchangeable
interchangeable cross-reference
interchangeable
417599-1Interchangeable
interchangeable cross-reference
interchangeable
36058Interchangeable
interchangeable cross-reference
interchangeable
54941Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB186990?
SMB186990 is a BRACKET.
What parts can replace SMB186990?
There are 5 known substitutes for SMB186990: 549, 05894512, 417599-1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SMB186990?
SMB186990 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-701-6359. This indicates validated use in U.S. government and defense supply chains.
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