Boltmaster 0.0625 in x 1/4 in W x 4 ft L Mill Aluminum U-Channel Seaboard Oak A: They have coarse threads

A: They have coarse threads

Secure Wood-to-Frame Fastening: Ideal for attaching a wooden face to wood or metal structures

they can be used with treated lumber when paired with like nuts and bolts

75 x 90 mm Hex Head Cap Screw (15-Pack)

Boltmaster 0.0625 in x 1/4 in W x 4 ft L Mill Aluminum U-Channel Seaboard Oak A: They have coarse threadsMill Aluminum U Channel, 4 ft, 1 4 in W Durable mill finish aluminum U channel for framing, edging, and structural support. Sized for 1 4 inch material with 1 16 inch thickness and 4 foot length, it offers lightweight strength and corrosion resistance for indoor or outdoor projects. Key Features: Sized for 1 4" Material: Fits and supports quarter inch panels and edges Lightweight Strength: Aluminum construction delivers rigidity without excess weight