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Technical Data Sheet
740-0411 ✓ 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 LENS INSERT,PRESCRIPTION is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: LENS INSERT PRESCRIPTION ESS/OAKLEY U-K. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-040-8368, 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
740-0411
NSN: 5330-01-040-8368
FSC: 5330
CAGE: 04171 — MAGNETIC SEAL LLC (USA)
SPECIFICATIONS
special_featuresESS/OAKLEY U-RX PRESCRIPTION INSERT WITH NOSEPIECE AND ADAPTER; COMPATIBLE WITH ESS ICE 2, ICE NARO, CROSSBOW SPECTACLES, OAKLEY SI M FRAME 2.0 SPECTACLES AND ESS PROFILE NVG GOGGLES
part_name_assigned_by_controlling_agencyLENS INSERT PRESCRIPTION ESS/OAKLEY U-K
NSN5330-01-040-8368
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 740-0411 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
CENTER HOLE DIAMETER: 0.498 INCHES NOMINAL IN
MATERIAL: STEEL COMP 416 OVERALL
CROSS-SECTIONAL HEIGHT: 0.260 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
PERIPHERAL DIAMETER: 0.810 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLE: FLANGE
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.498 INCHES NOMINAL IN
MATERIALSTEEL COMP 416 OVERALL
CROSS-SECTIONAL HEIGHT0.260 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
PERIPHERAL DIAMETER0.810 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLANGE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
6540NCM104405Interchangeable
interchangeable cross-reference
interchangeable
17079Interchangeable
interchangeable cross-reference
interchangeable
740-0411Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 740-0411?
740-0411 is a LENS INSERT,PRESCRIPTION.
What parts can replace 740-0411?
There are 3 known substitutes for 740-0411: 6540NCM104405, 17079, 740-0411. Substitute compatibility should be verified for your specific system.
What is the NSN for 740-0411?
740-0411 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-040-8368. This indicates validated use in U.S. government and defense supply chains.
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