Maybe one of these similar products would be of interest:-
25 Cap plug protection fitting Plastic valve sealing screw 12 x 1.5mm 14 x 1.5mm
1 x cylinder screw 10.9 - yellow galvanized - various sizes (M5 - M10) - DIN 912
Tungsten Carbide Insert Flanged, TCI-5E, 5/16" Bore, 1-13/32" Long 7/8" O.D.
Tungsten Carbide Insert Flanged TCI-7E (MH2 Style), 7/16" Bore, 1-13/32" Long
1 x lock tooth screw with flanges - yellow galvanized, lock screw, rib