Item Name: Saver Sub 4‑1/2″
Part Number: 9709700411
Material: 4145H modified alloy steel, quenched & tempered
Size: 4‑1/2 inch
Connection: NC50 (4‑1/2″ IF)
Hardness: 285‑341 BHN
Surface Treatment: Phosphate coating on threads
Application: Top drive / Kelly drilling string, sacrificial protection for kelly bar
