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 Features： Small thread outside the transfer within the thread More choices： Custom lengths and other thread changes are available upon request NO. Thread specification Thread length L Height H Width W PackingPCS External thread D1 Internal thread D2 Metric standard M12-M16 M12*1.5 M16*1.5 6 8.5 19 50 M16-M20 M16*1.5 M20*1.5 6 8.5 23 50 M20-M25 M20*1.5 M25*1.5 6.5 9 28 50 M25-M32 M25*1.5 M32*1.5 7.5 20 35 25 M32-M40 M32*1.5 M40*1.5 8 10 45 25 M40-M50 M40*1.5 M50*1.5 9 12.5 55 5 M50-M63 M50*1.5 M63*1.5 10 14 67 5 German standard PG7-PG9 PG7 PG9 6 8.5 19 50 PG9-PG11 PG9 PG11 6 8.5 21 50 PG11-PG13.5 PG11 PG13.5 6.5 8.5 23 50 PG13.5-PG16 PG13.5 PG16 6.5 9 25 25 PG16-PG21 PG16 PG21 6.5 9.5 32 25 PG21-PG29 PG21 PG29 7.5 10 41 10 PG29-PG36 PG29 PG36 8 11.5 52 10 PG36-PG42 PG36 PG42 9 12.5 58 5 PG42-PG48 PG42 PG48 10 14 64 5 US standard NPT3/8-NPT1/2 NPT3/8 NPT1/2 6.5 9 24 50 NPT1/2-NPT3/4 NPT1/2 NPT3/4 6.5 9 29 25 NPT3/4-NPT1 NPT3/4 NPT1 7.5 10 36 10 NPT1-NPT1/1/4 NPT1 NPT1/1/4 8 11.5 46 10