Uxcell 25mmx25mm Plastic Square Blanking End Caps Tube Inserts Black 200pcs Office Hardware It is a nut that

It is a nut that has a domed top to prevent contact with the external thread to protect the threads or protect other things the threads would rub against

Stainless Steel Material Countersunk Hex Socket Flat Head Key Bolts Screws

low odor and oil-resistance

and noncontact switching

Uxcell 25mmx25mm Plastic Square Blanking End Caps Tube Inserts Black 200pcs Office Hardware It is a nut thatPlastic Ribbed for easy assembly and secure fitting. Ideal for a more professional finish on tubing enclosures on trailers, racking, shop fittings etc. Can also be used as furniture guides on furniture feet to help protect floor surfaces.