Zoro Select Carriage Bolt M8-1.25×25 mm A2 Stainless Steel PK50

Zoro Select M8 Carriage Bolts

A pack of fifty metric carriage bolts in A2 stainless steel with plain finish suits builders and maintenance crews who need corrosion-resistant fasteners for wood-to-wood or wood-to-metal joints. The right-hand coarse thread M8-1.25 and 25 mm length cover common structural and furniture assemblies. DIN 603 compliance confirms standard dimensions for interchangeable use.

Square neck prevents rotation during tightening

The 8.58 mm square width seats into a matching hole so the bolt will not spin when the nut is driven. A 5.60 mm square height provides enough grip without splitting softer timber. Mis-drilled holes or oversized square openings are the typical cause of the neck pulling through, so match the drill to the 8.58 mm spec.

Sustained clamping force in outdoor exposure

A2 stainless delivers 101,500 psi tensile strength and resists rust in damp or coastal environments without coating degradation. The 4.88 mm round head distributes load across a 19.35 to 20.65 mm diameter, reducing embedment creep under long-term static loads. Plain finish avoids galvanic mismatch when paired with stainless nuts and washers.