I have been using 1/2" EMT (Electric Metal Tubes) to attach kayaks to my trailer and these plugs fit perfectly, prevent ingress of Rainwater in pipes and protect kayaks from sharp edges. Will update my review if I see any issues.
Stainless Fastener Bracket for Furniture Bedframes
8 Review
π© Enhanced Durability and Stability: Outside Joining Aluminum Profile Bracket
8 Review
π§ Boeray Stainless Steel Straight Brackets Mending: Durable and Versatile Support Solution
8 Review
π§ Inch Stainless Steel Brackets - Includes 80 Brackets
8 Review