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I just bought a standard faucet connection hose from a popular big-box hardware store, 1/2" FIP on one end and 3/8" compression on the other. Brand name BrassCraft, made in Taiwan. But my regular wrenches don't fit the nuts. For the 3/8" end my caliper reads 0.63"; a 5/8" wrench doesn't fit but a 16mm wrench does. For the 1/2" end my caliper reads 0.89"; a 7/8 wrench doesn't fit, and I don't have a big enough metric wrench to try but it looks like 23mm will work great. Is this the new normal?

I suppose this is just punishment for not going metric like the rest of the world.

Mark Ransom
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'Metric nuts' are those with metric-standard threading, not nuts that some metric-sized wrench fits. A nut with a given thread can have numerous different wrench sizes. My hardware collection includes M8x1.25 nuts with five different wrench sizes, for instance. I'd suggest an 11/16" wrench for your 3/8" compression nut and a 15/16" wrench for your 1/2" nut. I use those particular sizes frequently in plumbing work.

kreemoweet
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