EXTERNAL THREAD PAGE ONLY P100 10pcs sets and 61 pcs sets available. Search P100 set P100 Valve Thread Mandrel are provided for both external and internal threads. The number listed in our CHART tells the size of the mandrel. The first two numbers indicate the thread pitch and the last two numbers indicate the diameter in 64ths of an inch.NOTE: In most cases you will need at least two P100 Mandrels to repair damaged threads. One mandrel will be the actual size of the horn as listed below and the second will be smaller or larger depending on the type of threads.1 size larger for external thread or1 size smaller for internal threadAs an example, if you needed to repair an All Star cornet, you would order one P100 in size 3651 and the second in size 3652. If there is a PI at the beginning of the number it indicates internal threads. (example 3651PI) The P100 Valve Thread Mandrels may be ordered more economically in sets of 10. MORE INFO For Sizes Not Listed or Special Sizes Please Enter Desired Size in the Note Section on the Check-out Page P100A INTERNAL Valve Thread Mandrel SizesThe number listed in the chart below tells the size of the mandrel. The first two numbers indicate the thread pitch and the last two numbers indicate the diameter in 64ths of an inch. The INTERNAL P100A's valve thread mandrels listed are for internal threads and there is a PI at the beginning of the number it indicates internal threads.
