R-FF1-N-K-A4 Nylon frame fixing with collar hex head - stainless steel

The stainless steel screw for best anti-corrosion protection and external applications  
Collared plug for fixing of hard materials (eg. steel)  
Specially-formulated nylon allows best performance installation for use in all base material categories according to ETAG 020 (A, B, C, D)  
Internal plug geometry designed to fit the screw head  
Plug design ensures multi-axis expansion