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Technical Data Sheet
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STD-446-3 — COVER,PROTECTIVE,DUST AND MOISTU

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

STD-446-3: COVER,PROTECTIVE,DUST AND MOISTU.

COVER,PROTECTIVE,DUST AND MOISTU. This part is cataloged in the U.S. Government catalog under NSN 5340-01-726-2900, 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
STD-446-3
NSN: 5340-01-726-2900
FSC: 5340 — Hardware, Commercial
CAGE: 05259 — CONTAINER RESEARCH CORP DBA CONTAINER RESEARCH CORP DIV CONTAINR RESEARCH CORPORATION (USA)
SPECIFICATIONS
Part NumberSTD-446-3
NSN5340-01-726-2900
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: STD-446-3 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
SUBSTITUTES & CROSS-REFERENCES 1
922E003Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is STD-446-3?
STD-446-3 is a COVER,PROTECTIVE,DUST AND MOISTU.
What parts can replace STD-446-3?
There is 1 known substitute for STD-446-3: 922E003. Substitute compatibility should be verified for your specific system.
What is the NSN for STD-446-3?
STD-446-3 is cataloged in the U.S. Government catalog under NSN 5340-01-726-2900. This indicates validated use in U.S. government and defense supply chains.
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