J-Shaped Pocket Edge Fabric Clip

A 40 mm wide J-clip that grips a fabric pocket edge. A flat back plate holds two countersunk M3 screw holes, and a sprung leg closes back toward it.

Remix hooks

• Relaxed gap: 1.5 mm, set by the leg angle (about 6°). Raise it for thick cloth, lower it for more grip.
• Tooth: 0.8 mm round bump 12 mm from the leg tip. Make it larger, or remove it for a smooth clamp.
• Mouth flare: 25° over the last 6 mm. A wider flare helps with thick fabric.
• Bend radius: 3 mm inner, with 2.6 mm walls. Print with layers running along the width so the bend doesn't split.
• Holes: 25 mm apart, 20 mm up from the bottom, 3.4 mm with a 6 mm countersink. Change the spacing to match a mounting pattern.

Plate is 45 mm tall and the leg is 42 mm long. It pairs well with PETG or nylon for spring.