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12421859 — 12421859

✓ Government record, cited
U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM · ORING SEAL
PRODUCT OVERVIEW

12421859: 12421859.

The 12421859 is a U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM industrial component. This part is cataloged in the U.S. Government catalog under NSN 5340-01-454-4336, 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
12421859
NSN: 5340-01-454-4336
FSC: 5340 — Hardware, Commercial
CAGE: 0FW39 — BAE SYSTEMS TACTICAL VEHICLE SYSTEMS LP DBA DATA SYSTEMS INTERNATIONAL INC (USA)
SPECIFICATIONS
Part Number12421859
ManufacturerU S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
NSN5340-01-454-4336
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12421859 MFR: U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM ⚠ 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
•
SECOND LEG RELATIONSHIP TO FIRST LEG: NOT IDENTICAL
•
SECOND LEG LENGTH: 17.2500 INCHES NOMINAL IN
•
FIRST LEG HOLE ARRANGEMENT STYLE: NO HOLE
•
STYLE DESIGNATOR: ANGLE
•
FIRST LEG STYLE: SQUARE
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM-A-569 ASSN STD SINGLE MATERIAL RESPONSE
•
SECOND LEG THICKNESS: 0.1198 INCHES NOMINAL IN
•
FIRST LEG THICKNESS: 0.1196 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SECOND LEG RELATIONSHIP TO FIRST LEGNOT IDENTICAL
SECOND LEG LENGTH17.2500 INCHES NOMINAL IN
FIRST LEG HOLE ARRANGEMENT STYLENO HOLE
STYLE DESIGNATORANGLE
FIRST LEG STYLESQUARE
MATERIAL DOCUMENT AND CLASSIFICATIONASTM-A-569 ASSN STD SINGLE MATERIAL RESPONSE
SECOND LEG THICKNESS0.1198 INCHES NOMINAL IN
FIRST LEG THICKNESS0.1196 INCHES NOMINAL IN
FIRST LEG LENGTH2.7500 INCHES NOMINAL IN
FIRST LEG WIDTH9.0000 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
12421859-001Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12421859?
12421859 is a 12421859 manufactured by U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM.
What parts can replace 12421859?
There is 1 known substitute for 12421859: 12421859-001. Substitute compatibility should be verified for your specific system.
What is the NSN for 12421859?
12421859 is cataloged in the U.S. Government catalog under NSN 5340-01-454-4336. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.