3/8 - 24 TPI Keensert Locking Stainless Steel. There is a Nyloc ring at the end of the thread to provide locking. Price is for 1 off.
3/8” x 24 UNF Thread Repair Cutter Kit Helicoil Set for Damaged Threads 14pc
Sealey Drill Chuck Keyless 10mm 3/8" 24UNF ( 3/8 inch 24 unf 10 mm)
Sealey Drill Chuck 10mm 3/8" 24UNF ( 3/8 inch 24 unf 1-10 mm) with key
Steel Male Brake Pipe Union Fittings 7/16" x 24 UNF for 3/16" Brake Pipe 10pc
Steel Male Brake Pipe Union Fittings 3/8 x 24 UNF TTE for 3/16" Brake Pipe 10pc
Steel Female Brake Pipe Union Fittings 3/8" x 24 UNF for 3/16" Brake Pipe 10pc