Hillman 3/8-in x 1/2-in Green Plastic Screw Protector in the End Caps & Screw Protectors department at Lowes.com
Pack of 20) 3/8 Inch Round Black rubber/Vinyl Pipe End Cap Cover .375 - Amazon.com
3/8 Rubber Cap (2) - Hamby Dairy Supply
38mm O.d. Rubber Cap External End Cover 1 3/8" O.d. Round Pipe Tube Rack Stand 6 Pc - Pipe Fittings - AliExpress
Rubber End Caps, 1-3/8 inch ID Round End Cap Cover Flexible Screw Thread Protectors Red 5pcs - Walmart.com
Rubber Cap Suitable for 32mm dia Magnets - 33mm dia x 5mm high x 0.5mm thick
Screw Thread Protectors 9.5mm(3/8-inch) ID Rubber Round End Cap Cover Black Flexible Tube Caps Tubing Tip 50pcs - Walmart.com
Prescott Plastics 3/8 Inch Round Black Vinyl End Cap Rubber Cover (Pack of 20) | eBay
Auveco 12210 Rubber Vacuum Cap Black For 3/8 Dia Qty 25 – AutoFastenersAndClips.com
Rubber Cap Suitable for 60mm dia Magnets - 61mm dia x 6mm high x 0.5mm thick
Everbilt 3/8 in. Rubber Screw Protectors (2-Pack) 812818 - The Home Depot
Uxcell 25pcs Round Rubber End Caps 1/4" 3/8" 1/2" 3/4" 7/8" Black Vinyl Cover Screw Thread Protectors Assortment Kit - Cable End Caps - AliExpress
Rubber Water Blanking / Block Off Cap PAIR 3/8 9mm ID Round End plug stop pipe | eBay
Vinyl Rubber End Cap 3/8 ID X 1/2 Hole Depth X - Etsy
Non-Threaded Cap Plug 3/8"
Round Rubber End Black Vinyl Cover Screw Thread Protectors Assortment Kit - Temu
Rubber Vacuum Cap Black For 3/8 Dia. 25 pcs. – SMC Products
Made in USA Prescott Plastics 3/4” (19.05 mm) Round Rubber Hole Plugs, Vinyl End Cap, Black Rubber Caps for Metal Tubing, Fences, Glide Protection for Chair Legs and Furniture (10 Pack) - Amazon.com
Buy Sico Rubber Table/Chair Leg Cap - fits 3/8" OD Legs | Shiffler - Furniture, Fixtures and Equipment for Schools