

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The SMITH COOPER 36HB1004003L is a brass hex bushing sized 1/2 inch by 3/8 inch, designed to reduce a larger female threaded port to a smaller male threaded connection in piping systems. This fitting is sold as a single unit and is a standard choice for plumbers and pipefitters who need a compact, reliable threaded reduction in water, gas, or general-purpose fluid lines. Brass construction offers corrosion resistance and solid thread engagement, making it suitable for both residential and light commercial piping applications.
This hex bushing is used wherever a 1/2-inch female pipe thread needs to accept a 3/8-inch male pipe thread fitting. Typical installations include supply line connections at fixtures, equipment ports on HVAC and plumbing equipment, and distribution manifold outlets. The hex body allows a standard pipe wrench or open-end wrench to seat the fitting securely without damaging adjacent components.
Designed as an OEM-style replacement or new-installation fitting for residential and commercial piping systems requiring a 1/2-inch by 3/8-inch threaded brass hex bushing reduction.
Installation is performed by licensed plumbers or qualified pipefitters following applicable IPC and local plumbing code requirements. Shut off the water or gas supply and relieve system pressure completely before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly. Do not over-tighten brass fittings, as excessive force can crack the hex body or distort the threads.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!