Thread size： Metric thread, PG thread, NPT thread . Product material： Brass nickel plated Working temperature: -40℃-100℃ Short-term up to +120℃. Color: metal color, order number, such as: M12-M16 Product characteristics: The large screw thread small. More choice: Can be customized according to the length and other thread conversion NO. Thread specification Thread length  L Height H Width W Packing PCS External thread D1 Internal thread D2 Metric standard M16-M12 M16*1.5 M12*1.5 6 8.5 18 50 M20-M16 M20*1.5 M16*1.5 7 9 24 50 M25-M20 M25*1.5 M20*1.5 7.5 10 30 50 M32-M25 M32*1.5 M25*1.5 8 11.5 39 25 M40-M32 M40*1.5 M32*1.5 9 12.5 43 25 M50-M40 M50*1.5 M40*1.5 10 14 57 10 M63-M50 M63*1.5 M50*1.5 10 14 64 5 German standard PG9-PG7 PG9 PG7 6 8.5 17 50 PG11-PG9 PG11 PG9 6.5 8.5 20 50 PG13.5-PG11 PG13.5 PG11 6.5 9 22 50 PG16-PG13.5 PG16 PG13.5 6.5 9.5 24 50 PG21-PG16 PG21 PG16 7.5 10 30 25 PG29-PG21 PG29 PG21 8 11.5 39 25 PG36-PG29 PG36 PG29 9 12.5 50 25 PG42-PG36 PG42 PG36 10 14 57 10 PG48-PG42 PG48 PG42 10 14 64 5 US standard NPT1/2-NPT3/8 NPT1/2 NPT3/8 6.5 9 24 50 NPT3/4-NPT1/2 NPT3/4 NPT1/2 7.5 10 30 50 NPT1-NPT3/4 NPT1 NPT3/4 8 11.5 39 25 NPT1/1/4-NPT1 NPT1/1/4 NPT1 9 12.5 50 10