3.5 x 33mm Stainless Steel eye screws for the absolute safest toy making available.
Threaded Eyebolts, 5 Pack 1/4 X 6 Long Stainless
batz
M-Top 5 Pack 304 Stainless Steel Eye Screws Durable Eye Hooks Screw in Heavy Duty Perfect for Hammock Stand,Yoga,Swing Chair (Load Capacity 650lbs)
Bulldog Hardware 1-1/8 in. Screw Eye, Zinc Plated, 14 Pack
Other Hardware
Star Pull by Cheep Thrills Bird Toys
Everbilt #204 x 1-15/16 in. Stainless-Steel Screw Eye (2-Piece
Eye Bolts, Stainless Steel & Galvanised Eye Nuts
Everbilt 5/16 in. x 4 in. Stainless-Steel Screw Eye Bolt 7142S
Everbilt #8 Zinc-Plated Steel Screw Eye (50-Piece per Pack) 803682
5/16-In. OD x 1-1/2-In.-Long Extension Spring, 2-Pack