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Technical Data Sheet

3891T18 — Technical Data Sheet

✓ 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 STRAP,ELASTIC is a the manufacturer industrial component. Key specifications include length: 24.000 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5340-01-274-2744, 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
3891T18
NSN: 5340-01-274-2744
FSC: 5340
CAGE: 39428 — MCMASTER-CARR SUPPLY CO (USA)
SPECIFICATIONS
length24.000 INCHES IN
NSN5340-01-274-2744
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3891T18 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
•
LENGTH: 24.000 INCHES IN
TECHNICAL CHARACTERISTICS
LENGTH24.000 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
0641InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
66SSDInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
06 224InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4X231InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
18866InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
3891T118InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3891T18?
3891T18 is a STRAP,ELASTIC.
What parts can replace 3891T18?
There are 6 known substitutes for 3891T18: 0641, 66SSD, 06 224 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3891T18?
3891T18 is cataloged in the Federal Logistics Information System under NSN 5340-01-274-2744. This indicates validated use in U.S. government and defense supply chains.
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