Choice of materials in steel and stainless steel. The underside of the flange head is serrated that will increase fastener surface grip spread area.
Please note, the nylon material version is NOT serrated and is plain un-serrated flange face only.
Please note: the size range shown in the listed table is a selection of the most popular fasteners we sell. However, the size range we can supply is too vast to be listed here, so if the size or specification you require is not shown, please call the sales office and we will endeavour to supply to your requirement.