Thread: Metric, PG, G (PF), and NPT thread
Material: Brass with nickel plated
Application: To allow switching between different thread outside diameter. For example, from large metric external thread to small metric using. We also can make as your request for this product.

Thread		Item.No.	Thread Length (mm)	Total length (mm)	Spanner Size A&F(mm)	Std.Pkg (pcs)
External thread C3	Internal thread C1
M16×1.5	M12×1.5	M1612	6.0mm	8.5mm	18mm	10
M20×1.5	M16×1.5	M2016	6.5mm	9.0mm	22mm	10
M25×1.5	M20×1.5	M2520	7.0mm	10.0mm	30mm	10
M32×1.5	M25×1.5	M3225	8.0mm	11.5mm	40mm	10
M40×1.5	M32×1.5	M4032	9.0mm	12.5mm	50mm	10
M50×1.5	M40×1.5	M5040	10.0mm	14.0mm	59mm	10
M63×1.5	M50×1.5	M6350	10.0mm	14.0mm	67mm	10