one thing to watch out for is useless chinese junk ( the gold ones) . Steel temper is all wrong if even tempered at all ) just expanding to get on they will take a set and no clamp force . Usually sold as assortment boxes There is no technical reason old ones would crack or fail if not overstretched by opening too much They don't “get weak”’by themselves , The golden screwdriver over opening them does that , and you do need thst tool ( special plier ) On cracking , that is usually a fatigue failure caused by a scratch or surface blemish, combined with over stretching a few times . Same thing that breaks hardened valve springs; if it is on there ok in junkyard, don’t open too far it will be good , just enough to slide it no more On Feb 25, 2026, at 8:24 AM, Keith Boonstra <kboonstra.zeegroup@xxxxxxxxx> wrote:
Old ones seem to have a limited lifetime, so it’s sketchy to use junkyard clamps. They can get weak or snap. I bought way more than I need in new ones that are plated. I have not had one break and I have not had one leak. If you buy the proper pliers for about 25 bucks, the clamps are also very easy to use. So like I said, I do have some extras in most sizes if some folks need them. Keith Boonstra
Hi John
I sometimes use the older ones too but also I get new ones from Napa that are 100% stainless, they label them as marine hose clamps. They are made better than the flimsier versions. The nice thing is that the worm screw itself is stainless not zinc plated steel so no rust and no issues with longevity. So far so good on using these.
D&K Sent from my iPhone Had an annoying issue with modern version of the worm gear style screw clamps on my Hurst. New ones are so flimsy compared to what they used to be, and my original Corbins aren't cutting it anymore after 56 years. One actually broke and the other had lost tension enough to leak slightly. The new worm style fall apart under the slightest tightening compared to old versions, and if you are successful in tightening without stripping out, they either stretch or slip when the engine heats up and then leak after things cool down. There is a version available at NAPA that is really good, but it's a hose clamp that sells for $12! Guess I'm getting old, but that sounds crazy for a hose clamp. I may start removing clamps off of old cars in the junk yards. ;-)
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