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Five chrome-plated Grade 5 carriage bolts with round heads and square necks

Zoro Select

Zoro Select MPB664 Carriage Bolt 7/16-14x1 1/4 Pk5

SKU CH-3MZT-MTANA

Grade 5 steel carriage bolts with chrome-plated finish, 7/16‑14 UNC threads and 1‑1/4 in length, pack of five

  • Product typeScrews & Bolts
  • Grade 5 steel delivers 120,000 psi tensile strength
  • Chrome-plated finish resists corrosion for longer service life
  • Square neck locks into wood to prevent bolt rotation
  • ASME B 18.5 compliant dimensions ensure consistent fit
  • Pack of five carriage bolts sized 7/16-14 x 1-1/4 in

Carriage Bolt 7/16-14 UNC

These Zoro Select carriage bolts feature a Grade 5 steel construction with a chrome-plated finish for corrosion resistance. The round head and square neck design prevents rotation during tightening in wood or metal assemblies. Each pack contains five bolts measuring 1 1/4 inches in length with a 7/16 inch diameter and 14 threads per inch.

Coarse Thread UNC Limitations

The Unified National Coarse thread profile offers faster assembly but lower tensile stress area than fine-thread alternatives. The 14 threads per inch pitch limits adjustment precision in applications requiring fine clamping force control. Grade 5 tensile strength of 120,000 psi restricts use in high-stress structural connections requiring Grade 8 or higher rated fasteners.

Square Neck 0.431 Inch Width

The 0.431 inch square neck width determines compatibility with the mating hole or slot in your workpiece. A 29/64 inch drill size is specified for the bolt shank clearance. Verify the neck dimensions match your existing hardware or material thickness before purchase to ensure proper anti-rotation engagement.

How it compares

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Price $18.99
Typical for this category: the median of 2,607 items is $18.99.

Specifications

Product
Brand nameZORO SELECT
Product typeScrews & Bolts

Questions about this item

Should I pick the five-pack or a different quantity?

This listing is the five-piece pack; no other pack sizes are offered for this part number.

How does the 120,000 psi tensile strength hold up in a real assembly?

Grade 5 steel rated at 120,000 psi provides strong clamping force for structural joints when torqued to spec.

What does the 7/16-14 UNC thread limit in practice?

The coarse 7/16-14 UNC thread fits standard Grade 2 nuts and requires a 29/64 in drill clearance hole.

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