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AG26 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY B OVERALL, thickness: 0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN, hole_diameter: 0.142 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES ALL SURFACES, overall_diameter: 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN, peripheral_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-143-6657, 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
AG26
NSN: 5340-00-143-6657
FSC: 5340
CAGE: 66289 — WISCONSIN MOTORS, LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY B OVERALL
thickness0.029 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN
hole_diameter0.142 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES ALL SURFACES
overall_diameter0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5340-00-143-6657
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AG26 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 27
399196-2Interchangeable
interchangeable cross-reference
interchangeable
4206Interchangeable
interchangeable cross-reference
interchangeable
914077-1Interchangeable
interchangeable cross-reference
interchangeable
210AP20-4505Interchangeable
interchangeable cross-reference
interchangeable
AD12-38Interchangeable
interchangeable cross-reference
interchangeable
SAC207Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AG26?
AG26 is a WASHER,FLAT.
What parts can replace AG26?
There are 27 known substitutes for AG26: 399196-2, 4206, 914077-1 and 24 more. Substitute compatibility should be verified for your specific system.
Is AG26 still available?
AG26 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