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Stainless steel M10 carriage bolt, round head, square neck, 25 mm length, pack of 50

Zoro Select

Zoro Select Carriage Bolt M10-1.50 25 mm PK50

SKU CH-5E7M-E6KFE

A2 stainless-steel carriage bolt, M10-1.50 thread, 25 mm long, square neck, DIN 603, pack of 50

  • Product typeScrews & Bolts
  • Corrosion-resistant A2 stainless steel for outdoor use
  • Square neck locks into wood to prevent rotation
  • 101 500 psi tensile strength handles heavy loads
  • DIN 603 compliant dimensions ensure reliable fit
  • Pack of 50 covers multiple fastening jobs

Zoro Select M10 Carriage Bolts Pack

These Zoro Select carriage bolts come in a pack of 50 pieces with M10-1.50 metric coarse threads and a 25 mm fastener length. They suit automotive, construction and general maintenance tasks where a smooth round head and square neck prevent rotation during tightening.

Tensile Strength 101 500 psi Capacity

The A2 stainless steel construction delivers a tensile strength of 101 500 psi, handling structural joints and outdoor exposure without corrosion. The plain finish offers no additional coating, so galvanic compatibility must be checked when pairing with dissimilar metals in long-term assemblies.

DIN 603 Square Neck Dimensions

Each bolt follows DIN 603 with a square neck width of 10.58 mm and height of 6.60 mm that locks into matching square holes. The head diameter ranges from 23.35 to 24.65 mm and head height is 5.38 mm, so verify countersink depth and clearance before installation.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $38.99
Pricier than about 68% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameZORO SELECT
Product typeScrews & Bolts

Questions about this item

Will these M10 carriage bolts fit the square holes in my existing steel brackets?

The square neck measures 10.58 mm wide by 6.60 mm high, matching standard M10 square-hole patterns so the bolt locks against rotation when seated.

How can I verify the bolts meet the DIN 603 standard after installation?

Check that each round head measures 23.35–24.65 mm diameter and 5.38 mm height, and that the square neck sits flush in the hole preventing spin under load.

Does the pack of 50 include matching nuts and washers or must I buy them separately?

The package contains only the 50 A2 stainless carriage bolts; metric M10 nuts and washers are not included and must be purchased separately.

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