Polypropylene screw-cap kits consisting of pairs of domed caps and cup washers, available in three matt finish colours.,The cup washers are held in place by the screw, bolt or rivet head, and the domed cap clips into place over the washer.

Suitable for insulating screwheads, enhancing appearance of panels & instrument cases, providing lightweight feet etc
Each kit contains 25 pairs of caps & washers, in 4 sizes
Accommodates screw sizes from M2 to M5 (No. 3 to No.12)
Smallest size is ideally suited to covering RS Speedriv 3mm rivets

25 pairs (caps/washers) of each type are included in each kit.

Type U61, U63 & U64 have low-profile caps, and are primarily intended for countersunk head screws, although they may also be used with pan head screws.,Size to suit any specific screw will depend on the screw size and head type.