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Plain round-head carriage bolt, square neck, A2 stainless, M8-1.25 by 80 mm, pack of 25

Zoro Select

Zoro Select Carriage Bolt M8-1.25 x 80 mm A2 SS PK25

SKU CH-414H-GA3P9

Stainless-steel M8 carriage bolts with square necks, 80 mm long, DIN 603 compliant, pack of 25

  • TypeScrews & Bolts
  • A2 stainless steel resists corrosion in outdoor use
  • Square neck locks into wood to prevent spinning
  • DIN 603 standard ensures consistent dimensions and fit
  • 25-piece pack covers multiple fastening jobs
  • 101,500 psi tensile strength handles heavy structural loads

Zoro Select M8 Carriage Bolt

The Zoro Select carriage bolt uses a metric M8-1.25 thread and an 80 mm length with a square neck that locks into wood or metal when the nut is tightened. Stainless steel grade A2 provides corrosion resistance for outdoor or damp environments. Each pack contains 25 plain-finished bolts manufactured to DIN 603 dimensions. The round head measures 19.35 to 20.65 mm in diameter with a 4.88 mm height.

Who should use these bolts

Builders and maintenance teams needing a square-neck fastener for timber-to-timber or timber-to-steel joints will find the M8 size and 80 mm reach suitable. The A2 stainless material handles exterior decks, fences and marine fittings without red rust. Projects requiring a different diameter, a longer reach or a hex-drive head must source another fastener. Buyers needing high-strength graded bolts beyond the listed tensile strength of 101,500 psi should specify a higher property class.

What the pack quantity changes

A single pack delivers 25 identical bolts so crews can complete multiple connections without opening several boxes. The plain finish means no coating thickness to account for in tight clearances. Orders reaching the supplier's 75 threshold ship without a separate freight charge. The square neck dimensions of 5.60 mm height by 8.58 mm width ensure consistent engagement in standard square holes.

Highlights

  • A2 stainless steel resists corrosion in outdoor use
  • Square neck locks into wood to prevent spinning
  • DIN 603 standard ensures consistent dimensions and fit
  • 25-piece pack covers multiple fastening jobs
  • 101,500 psi tensile strength handles heavy structural loads

Specifications

BrandZORO SELECT
TypeScrews & Bolts

Questions about this item

What size spanner or socket fits the M8-1.25 thread on these Zoro Select carriage bolts?

The thread is metric coarse M8-1.25; choose a spanner or socket sized for an M8 nut.

Will the 19.35 to 20.65 mm round head and 8.58 mm square neck sit flush in my existing DIN 603 clearance holes?

The head diameter range and 8.58 mm square width match DIN 603 dimensions for M8 carriage bolts.

How can I confirm the A2 stainless steel bolts meet the 101,500 psi tensile strength after installation?

Check for the A2 grade marking on the round head and verify the joint holds without neck deformation under load.

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