Zoro Select
Zoro Select Carriage Bolt M8-1.25×25 mm A2 Stainless Steel PK50
Metric M8-1.25 carriage bolt, 25 mm long, A2 stainless steel with square neck, DIN 603, pack of 50
- TypeScrews & Bolts
- Corrosion-resistant A2 stainless steel withstands moisture
- Square neck locks into wood to prevent spinning
- 25 mm length suits medium-thickness joinery
- DIN 603 standard ensures consistent dimensions
- Pack of 50 covers multiple fastening tasks
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.
Highlights
- Corrosion-resistant A2 stainless steel withstands moisture
- Square neck locks into wood to prevent spinning
- 25 mm length suits medium-thickness joinery
- DIN 603 standard ensures consistent dimensions
- Pack of 50 covers multiple fastening tasks
Specifications
| Brand | ZORO SELECT |
|---|---|
| Type | Screws & Bolts |
Questions about this item
How can I confirm the carriage bolt is seating correctly after installation?
The square neck (8.58 mm wide, 5.60 mm high) should lock into a square hole and prevent rotation while the round head (19.35–20.65 mm diameter, 4.88 mm height) sits flush with the surface.
What does the pack contain and is anything else needed?
The pack contains 50 M8-1.25 × 25 mm A2 stainless-steel carriage bolts to DIN 603. Matching M8 nuts and washers are not included and must be purchased separately.
Which variant should I choose for general outdoor use?
This single variant is A2 stainless steel with a plain finish and 101,500 psi tensile strength, suitable for general outdoor and corrosion-resistant applications.
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