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RA3540-3 — PLUG,PROTECTIVE,DUST AND MOISTUR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

RA3540-3: PLUG,PROTECTIVE,DUST AND MOISTUR.

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: PLASTIC, drive_type: SCREW SLOT OR SERRATED, design_type: THREADED, overall_diameter: 0.563 INCHES NOMINAL IN, thread_size_and_series/type_designator: 1/2-14 NPT. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-290-3581, 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
RA3540-3
NSN: 5340-00-290-3581
FSC: 5340 — Hardware, Commercial
CAGE: 51663 — HYDRO-AIRE AEROSPACE CORP. DBA LEAR ROMEC DIV LEAR ROMEC (USA)
SPECIFICATIONS
materialPLASTIC
drive_typeSCREW SLOT OR SERRATED
design_typeTHREADED
overall_diameter0.563 INCHES NOMINAL IN
thread_size_and_series/type_designator1/2-14 NPT
NSN5340-00-290-3581
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: RA3540-3 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
KEY FEATURES
•
DESIGN TYPE: THREADED
•
OVERALL DIAMETER: 0.563 INCHES NOMINAL IN
•
DRIVE TYPE: SCREW SLOT OR SERRATED
•
MATERIAL: PLASTIC
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1/2-14 NPT
TECHNICAL CHARACTERISTICS
DESIGN TYPETHREADED
OVERALL DIAMETER0.563 INCHES NOMINAL IN
DRIVE TYPESCREW SLOT OR SERRATED
MATERIALPLASTIC
THREAD SIZE AND SERIES/TYPE DESIGNATOR1/2-14 NPT
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 5
74537-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
890335-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
61561Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4-1042-34-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
M400-19Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RA3540-3?
RA3540-3 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace RA3540-3?
There are 5 known substitutes for RA3540-3: 74537-4, 890335-4, 61561 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RA3540-3?
RA3540-3 is cataloged in the U.S. Government catalog under NSN 5340-00-290-3581. This indicates validated use in U.S. government and defense supply chains.
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