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Technical Data Sheet
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V421C ✓ 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 CLIP,SPRING TENSION is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-270-7403, 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
V421C
NSN: 5340-01-270-7403
FSC: 5340
CAGE: 95021 — DURSTON MANUFACTURING COMPANY DBA VIM TOOLS (USA)
SPECIFICATIONS
Part NumberV421C
NSN5340-01-270-7403
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: V421C 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 15
A272Interchangeable
interchangeable cross-reference
interchangeable
CA272Interchangeable
interchangeable cross-reference
interchangeable
A2-7-10Interchangeable
interchangeable cross-reference
interchangeable
60A260Interchangeable
interchangeable cross-reference
interchangeable
856335Interchangeable
interchangeable cross-reference
interchangeable
320675Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is V421C?
V421C is a CLIP,SPRING TENSION.
What parts can replace V421C?
There are 15 known substitutes for V421C: A272, CA272, A2-7-10 and 12 more. Substitute compatibility should be verified for your specific system.
Is V421C still available?
V421C 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