YMW 10-24 Roll Form Tap 2-2-1/2 Lead Manufacture YMW Mfg Part Number 388454 Size ( US ) Thread Limit H4 Number of Lobe Grooves 1 Chamfered Bottom Lead 2 to 2-1/2 Finish/Coating Nitride Material Vanadium High Speed Steel Oversize (Yes/No) No Length of Thread .630 Overall Length (Inch) 2.756 Thread Standard.