Home / PLASTIC HARDWARE:- FASTENERS, LATCHES, PLASTIC SPACERS, PLASTIC RIVETS, RUBBER FOOT, / CLH41 & CLH42 – Brass Insert for Plastics CLH41 & CLH42 – Brass Insert for Plastics Brass inserts for plastics are used where a strong metal thread is required in plastic material. Brass inserts are used on computers, Automotive, electronic and business machines or where a strong thread is required on a plastic component. Category: PLASTIC HARDWARE:- FASTENERS, LATCHES, PLASTIC SPACERS, PLASTIC RIVETS, RUBBER FOOT, Product ID: 3832