Description
3/8 x 2 1/2 Zinc Carriage Bolt is a plated steel fastener often used indoors or in lighter-duty applications in non-corrosive environments. Zinc fasteners are a less expensive, more cost-effective option than hot-dipped galvanized or stainless steel alternatives.
Carriage bolts have a smooth mushroom head, a square section immediately below, and a partially-threaded circular shank cross-section. Other names for Carriage Bolts include “plow bolts” and “coach bolts,” as the construction of carriages and carriage wheels popularized these fasteners.
3/8 x 2 1/2 Zinc Carriage Bolt Features
- Versatile fastener that can be placed in square or round holes
- Self-locking shape when placed through a square hole
- Tamper-resistant application due to the carriage bolt’s smooth, round head, which prevents turning once installed
Common uses
- Fastening wood to wood, wood to metal, or metal to metal
- Heavy-duty wood applications requiring stronger holds, timber bolts, or wood screws
- Building bridges, docks, wooden walkways, playground equipment, and industrial signage
- Woodworking, metalworking, marine construction, water conservation and treatment, railroad, farming, and mining industries.
Application
- Only insert into pre-drilled holes
- Use a drill and drill bit
- Pair with appropriate size nut and washer
Tips
- Using washers with Carriage Bolts helps prevent damage
- These fasteners are measured along their entire length, right from underneath the head, including the square neck













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