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(S61-10) COMPRESSION NUT 5/8

Description & Features

Manufactured by Midland Industries, this 5/8 compression nut is designed for use in compression-style tube fittings where a secure, leak-resistant mechanical connection is required. The (S61-10) COMPRESSION NUT 5/8 serves as the threaded retaining component that draws the ferrule against the fitting body to grip and seal tubing in industrial fluid systems.

At 5/8 inch, this nut is suited for corresponding compression fitting assemblies and is intended for use with compatible Midland Industries S61-series components. The part is a practical replacement or supplemental piece for existing compression fitting installations across a range of industrial fluid conveyance applications.

SKU: 18040L

Supplier Part Number (MPN): 18040L

Specifications

Brand Midland Industries	Brand Midland Industries	Pack Size 1.00	UOM EA	Supplier Part Number 18040L	Product Weight 0.04 lbs

Product Questions & Answers (2)

Question by: Patty R on Feb 20, 2026, 8:45 PM

Got an S61-series compression fitting assembly I'm trying to finish up, this the nut that goes with it?

Answer by: Customer Support on Feb 22, 2026, 8:11 PM

For S61-series compression fitting assemblies from Midland Industries, the S61-10 is the correct threaded retaining nut at the 5/8 inch size. It works by threading onto the fitting body and drawing the ferrule tight against the tubing to create that mechanical grip and seal. As long as your assembly is a 5/8 inch S61-series setup, this is the piece you need.

Question by: Lee B on Apr 4, 2026, 6:25 AM

Will this compression nut work with any 5/8" compression fitting, or does it need to be a Midland Industries one?

Answer by: Customer Support on Apr 5, 2026, 6:27 AM

This compression nut is intended for use with compatible Midland Industries S61-series components, so best practice is to stick with that series for the right fit.