These are handles with a knurled head made of black nylon and a threaded nut made of metal or plastic. They are available in two different head diameters (BPF 210 = 21 mm and BPF 270 = 27 mm).
Manufactured in black Polyamide, these fasteners are both lightweight for their size, and strong in operation.
They can be supplied in any of four thread materials to suite your requirements. Brass, nylon, Zinc plated steel(zps) or stainless steel A2.
Use for clamping and locking applications where frequent use is required.