Skip to the beginning of the images gallery

(S61-10) COMPRESSION NUT 5/8

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

Product Questions & Answers

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

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

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

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

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

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