Carmex Internal Right Hand UN Unified Thread Turning Insert 20 TPI / 16 IR 20 UN P25C HSS-E Countersink Cutter 90° 3/4" Weldon Shank 30mm Ordering Code: 22V ER N60

Ordering Code: 22V ER N60 BLU

BSPT Metric Threads

Philips 30-2171/2151

Part Number: 4621-40

A torch maybe useful to examine the seat

Carmex Internal Right Hand UN Unified Thread Turning Insert 20 TPI / 16 IR 20 UN P25C HSS-E Countersink Cutter 90° 3/4" Weldon Shank 30mm Ordering Code: 22V ER N60Internal Thread Turning Insert UN Full Profile 60 The UN Full Profile Internal Thread Turning Insert is engineered for precise internal threading of Unified thread forms (UNC, UNF, UNEF, UNS) with a 60 profile. Designed for a 20 TPI pitch, it forms the complete thread geometryincluding crest, root, and flanksin one pass, ensuring consistency and strength in every cut. Made from premium P25C grade carbide, this insert provides excellent wear