Pretty tough to mess something like this up I think. Wrapped some teflon tape around the threads on whatever you're planning to connect and snug it up nice. Haven't had any issues yet.
I purchased this Craftsman 1/4 in. Quick-Connect Studs, Female to replace a few worn out ones that were well over five years old. Highly recommended.
Good product and fit my air hose without any problems. Good quality a reasonable price . Install was quick and simple. I wound recomend this product to any of my friends.
The connectors are the same as any other quick connect I have used before. Was in the store, needed them and bougth them at Sears.