Help, please! - Can you help identify this mystery check valve / bolt?
It was lying in the bottom of my client’s boat - I’ve searched manuals but I cannot find what it is, or where it belongs, or what it does… ??
It appears to be imperial [vs metric] - about 3/8" long, head appears to be 5/16 hex, 3/8" long under the head, and the thread appears to be 1/4-28 ... ??


It was lying in the bottom of my client’s boat - I’ve searched manuals but I cannot find what it is, or where it belongs, or what it does… ??
It appears to be imperial [vs metric] - about 3/8" long, head appears to be 5/16 hex, 3/8" long under the head, and the thread appears to be 1/4-28 ... ??
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