A stud bolt is an externally threaded mechanical fastener, which used in high pressure bolting situations for pipeline, drilling, petroleum / petrochemical refining and general industry for sealing and flange connections, All thread, tap end and double end stud bolts are the lion’s share of the industry. Sizes: Metric sizes range from M4-M64, inch sizes range from 1/4 '' to 2 1/2 ''. Package Type: carton or bag and pallet. Payment terms: T/T, L/C. Delivery Time: 30 days for one container. Trade Term: EXW, FOB, CIF, CFR.