BSPF BRITISH STANDARD PIPE FASTENING DIE NUTS NOMINAL PIPE SIZE X THREADS PER INCH:3/8 X 19 They are manufactured in Carbon

They are manufactured in Carbon Steel (Tungsten Chrome Alloy) for general purpose DIY use

and foam rubber

Robust construction

Color Indicator: Beads change from Blue to Red/Pink when they have absorbed their maximum moisture

preventing damage against dust and moisture

BSPF BRITISH STANDARD PIPE FASTENING DIE NUTS NOMINAL PIPE SIZE X THREADS PER INCH:3/8 X 19 They are manufactured in CarbonBSPF (British Standard Pipe Fastening) die nuts are hex shaped threading tools used to repair, clean, and chase damaged male threads on pipes and fittings. Unlike standard round cutting dies, die nuts are turned with a conventional wrench or socket rather than a specialized die stock. Key Characteristics of BSPF Die Nuts Purpose: They are strictly for re threading or cleaning existing bruised, rusty, or cross threaded pipes. They are not designed to