The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1962 GMC K1000 front brake hose to cylinder fittings

Ledslinger · 08-19-2023, 09:43 PM

My plan to file down the 1/8" NPT steel fitting down to .3667, and thread to 7/16"-20 worked perfect. I cut the head off a 7/16"-20 bolt to screw into the fitting and chucked the non threaded bolt shank into the drill chuck. Laid my small drill press on its side to do the filing, then stood it up and spun it by hand in the die and stock laid on the drill press table.

Some have solved the problem by tapping the wheel cylinder to 7/16"-20 and using no adapter, but I wanted to keep the original setup with the adapter. Nobody cares about this unless you still have drum brakes on a 1960-1963 or so GMC K1000 or K10, but I have seen several discussions in the past seeking this fitting.

08-19-2023, 09:43 PM	#3
Ledslinger Registered User Join Date: Dec 2011 Location: Lee's Summit, MO Posts: 102	Re: 1962 GMC K1000 front brake hose to cylinder fittings My plan to file down the 1/8" NPT steel fitting down to .3667, and thread to 7/16"-20 worked perfect. I cut the head off a 7/16"-20 bolt to screw into the fitting and chucked the non threaded bolt shank into the drill chuck. Laid my small drill press on its side to do the filing, then stood it up and spun it by hand in the die and stock laid on the drill press table. Some have solved the problem by tapping the wheel cylinder to 7/16"-20 and using no adapter, but I wanted to keep the original setup with the adapter. Nobody cares about this unless you still have drum brakes on a 1960-1963 or so GMC K1000 or K10, but I have seen several discussions in the past seeking this fitting.