6 [ Metal caps for use with tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; metal flange caps; metal pipe caps; recessed metal pipe caps; recessed metal pipe caps for crane hooks; metal protective caps for use with tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; protective metal caps for shafts; metal protection caps for use with tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; metal shaped protection caps for use with tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; metal pipe protection caps for pipes; metal stud protection caps; metal tapered protection caps for use with tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; metal caps for screws; metal sealing caps for use with tubing ends, ports, bores, pipe ends, fittings, and holes; metal threaded sealing caps for tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; metal shutter caps for tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; metal shutter caps for pipes; metal snap caps for tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; metal bolt and nut snap caps; metal threaded caps for tubing ends, ports, bores, pipe ends, fittings, holes, and stud protection; flange covers, namely, metal flange caps; metallic discs, namely, metal sealing rings, metal washers; metal cable wire fasteners, namely, cable glands; metal sealing rings, namely, grommets and cable grommets; inserts, namely, metal sealing caps for pipes, tubing ends, cables, ports, bores, and holes; multi-sealing inserts, namely, metal sealing rings; shaped inserts, namely, metal sealing caps for pipes, tubing ends, cables, ports, bores, and holes; shaped inserts ribbed, namely, metal sealing caps for pipes, tubing ends, cables, ports, bores, and holes; metal plugs; metal plugs, namely, blanking plugs, cone plugs, flange cone plugs, disc plugs, flap plugs, flap plugs for shaped pipes, grip plugs, pipe end plugs, pressure pipe plugs, protection plugs, flange face protection plugs, flat head protection plugs, parallel protection plugs, round head protection plugs, tapered protection plugs, threaded protection plugs, radiator plugs, screw plugs, sealing plugs, sealing plugs with recessed flange, threaded sealing plugs, threaded sealing plugs with drain head, threaded sealing plugs with assembled washer, threaded sealing plugs with drain head and assembled washer, tapered plugs, solid tapered plugs, threaded plugs, radiator threaded plugs, domestic radiator threaded plugs, commercial radiator threaded plugs; protectors, namely, corrosion-resistant metal overlays and alloys for fittings, steel plates, flanges, piping components; edge protectors, namely, corrosion resistant metal overlays and alloys for fittings, steel plates, flanges, piping components; open bevel edge protectors, namely, corrosion-resistant metal overlays and alloys for fittings, steel plates, flanges, piping components; flange protectors, namely, corrosion-resistant metal overlays and alloys for flanges; stud hole fitting flange protectors, namely, corrosion-resistant metal overlays and alloys for fittings; outside fitting flange protectors, namely, corrosion-resistant metal overlays and alloys for fittings, steel plates, flanges, piping components; metallic pipe enlargers, namely, metal pipe connectors, metal pipe collars, metal pipe fitting, all for expanding pipe length; metal rings, namely, metal flange rings, metal splash-guard flange rings, metal guard rings for sealing, metal open edge guard rings for sealing, metal safety rings for sealing; metal expanding sleeves for affixing screws; metal expanding protective sleeves for affixing screws; metal nuts, namely, metal locknuts, metal locknuts with flanges, metal flangeless locknuts ]