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Technical Data Sheet
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166378 ✓ 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 CHAIN,SILENT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, link_style: SIDE GUIDES, effective_length: 2.1776 FEET NOMINAL FT, special_features: AJXY /SHROUD/, surface_treatment: PASSIVATE, link_nominal_width: 0.1550 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-105-3253, 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
166378
NSN: 5330-00-105-3253
FSC: 5330
CAGE: 64104 — DRESSER, LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
link_styleSIDE GUIDES
effective_length2.1776 FEET NOMINAL FT
special_featuresAJXY /SHROUD/
link_row_quantity5
surface_treatmentPASSIVATE
link_nominal_width0.1550 INCHES IN
nominal_pitch_distance0.188 INCHES IN
minimum_tensile_strength400 POUNDS PER SQUARE INCH LBS
link_nominal_width_between_plates0.1550 INCHES IN
NSN5330-00-105-3253
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 166378 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 6
230056Interchangeable
interchangeable cross-reference
interchangeable
SC0305-139Interchangeable
interchangeable cross-reference
interchangeable
166378Interchangeable
interchangeable cross-reference
interchangeable
3020004845771Interchangeable
interchangeable cross-reference
interchangeable
110984Interchangeable
interchangeable cross-reference
interchangeable
91693764Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 166378?
166378 is a CHAIN,SILENT.
What parts can replace 166378?
There are 6 known substitutes for 166378: 230056, SC0305-139, 166378 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 166378?
166378 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-105-3253. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026