Carmex Internal External Whitworth Threadmill Insert 21mm 14 TPI 21 14 W MT7 Insize Tubular Inside Micrometer 225 250mm Range Series 3229 250 The SOMTA 1010970 – 9 280 Piece Brass Hex standard course Nut kit The SOMTA 1010970 – 9 The ISO Full Profile Internal Thread Turning Insert is designed to accurately produce metric threads with a 60° profile in accordance with ISO standards it’s a versatile choice for general engineering and industrial pipe thread production The Carmex 21–14 W MT7 is a high precision internal and external thread milling insert engineered for cutting Whitworth 55° thread profiles with a 14 TPI pitch