for water well digger truck geothermal cleanouts rig.
1-1/2" x 2-1/4" API thread (please double check with measurements shown in pictures).
50" length not including tool joing pin length.
Presumably American manufactured with carbon and/or alloy steels, but unsure if this is Acme, Spang, Gill Rock Drill, Ideco, Trident, Rampp, O.W.S. Co., Keystone or maybe another historical tooling manufacturer.
If you require thread protector(s) on tool joint(s) add another $15.