Mainstays 6 ft Fold-in-Half Bench Fold Lock Clip / Insert Replacement

Replacement for the black plastic lock insert on the Mainstays 6-Foot Fold-in-Half Bench (white, steel frame, carry handle; sold at Walmart, and similar benches on Amazon). The plug presses into the end of one of the bench's main steel support tubes, and the two-finger snap fork clips into the receiver on the other half of the bench to hold the bench together when it's folded. Designed from caliper measurements of an original insert. Fork matches stock width (16.4 mm across the bulge) with a center stiffening spine on each finger, and the finger roots are recessed into the cap for extra flex. The plug has rounded edges, a tapered lead-in, light crush ribs, and a small nub on both faces that clicks into the hole in the tube (7.5 mm from the end). The curved back clears the bench's plastic seat so the tube sits flush. Print settings (tested): Sunlu PLA+, part lying on its side as oriented in the file, supports touching build plate only, 4+ walls, 40% infill. Fit: tube inside is about 23.1 x 11.1 mm. If your print comes out tight, scale X/Y to 99% in your slicer.