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Five chrome carriage bolts with round heads and square necks, 1/4-20 thread, 2 inch length

Zoro Select

Zoro Select MPB748 Carriage Bolt Chrome 1/4-20x2 PK5

SKU CH-1AWR-J41T4

Chrome-plated Grade 5 carriage bolts, 1/4-20 by 2 inches, pack of five

  • TypeBolts
  • Grade 5 steel delivers 120,000 psi tensile strength
  • Chrome plating resists corrosion on indoor and outdoor projects
  • Square neck locks into wood to prevent bolt spin during tightening
  • Coarse UNC 1/4-20 threads speed assembly with standard nuts
  • Pack of five covers multiple joints in a single purchase

Carriage bolt for wood-to-metal joints

These Grade 5 carriage bolts feature a square neck that locks into wood to prevent rotation during tightening. The coarse UNC 1/4-20 thread engages standard Grade 2 nuts securely. Each pack contains five pieces for small repair or assembly tasks.

Medium carbon steel with chrome plating

The chrome finish resists corrosion in outdoor or damp environments better than plain steel. A 17/64 inch drill size matches the 0.245 inch square neck width for a tight fit. Round heads measuring 0.563 inch diameter sit flush without countersinking.

Rated to 120,000 psi tensile strength

Grade 5 heat treatment handles structural loads in decking, fencing and trailer work. The 0.125 inch head and square heights keep profiles low against connected surfaces. Right-hand threading follows standard installation practice with common hand tools.

Highlights

  • Grade 5 steel delivers 120,000 psi tensile strength
  • Chrome plating resists corrosion on indoor and outdoor projects
  • Square neck locks into wood to prevent bolt spin during tightening
  • Coarse UNC 1/4-20 threads speed assembly with standard nuts
  • Pack of five covers multiple joints in a single purchase

Specifications

BrandZORO SELECT
TypeBolts

Questions about this item

What does the UNC 1/4-20 thread mean for fit?

The coarse 20 threads per inch match standard Grade 2 nuts and tapped holes for this diameter.

What hole size and head clearance does the 1/4 in. carriage bolt need?

Drill a 17/64 in. hole; the round head is .563 in. wide and .125 in. tall with a .245 in. square neck.

How do you install the square neck so the bolt will not spin?

Insert through the drilled hole and tap the head until the .125 in. square seats flush in the wood or metal.

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