• retaining-ringFine Threaded Black
  • heavy hex nutFine Threaded Grey
  • rivet-nutsFine Threaded ZP
  • blind-rivetsFine Threaded YZP

 

Drywall Screws fine threaded, generally used for plasterboard, thin sheet meter or wood works.

Material to be C1022 Steel, screws to be further heated/hardend.

Surface treatment: black, grey phosphated, zinc or yellow zinc plated

 

Drywall Screws coarse threaded also widely used in wood works, pls see below difference on threads