The Monarch Seal Kit is a reliable and essential component for maintaining the integrity of hydraulic systems. Designed and manufactured by Monarch Industries Inc, this seal kit ensures optimal performance by preventing leaks and maintaining hydraulic efficiency. It is engineered for durability and fits seamlessly into compatible hydraulic applications, making it an ideal choice for professionals seeking high-quality maintenance solutions.
This kit is identified by the Supplier Part Number 639580, ensuring you receive the correct product for your needs. Its robust construction and precise fit help extend the lifespan of hydraulic components, reducing downtime and maintenance costs in industrial settings.
SKU: RK40L-150
Supplier Part Number (MPN): 639580
Alternate Part Numbers: C1DK20
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Specifications
Alternate Part Numbers
Alternate Part Number639580, Alternate Part Number C1DK20
Brand
Monarch Industries Inc
Brand
Monarch Industries
Pack Size
1.00
UOM
EA
Supplier Part Number
639580
Product Weight
0.11 lbs
Product Questions & Answers (1)
Question by: Janice W on Jan 22, 2026, 9:00 AM
Trying to track down the right seal kit for a Monarch hydraulic unit and I keep running into wrong part numbers. This one listed as 639580, that the same as C1DK20?
Answer by: Customer Support on Jan 23, 2026, 5:47 PM
Both numbers refer to the same kit. The supplier part number is 639580, and C1DK20 is an alternate part number for the same product. The SKU on this one is RK40L-150, so if you're cross-referencing across a few different sources, any of those identifiers should point you to the right place.
