Value Collection 34587 Carriage Bolt 1/4-20 Unc 6in Square Neck

Product Description

The VALUE COLLECTION 34587 is a 1/4-20 UNC carriage bolt with a 6-inch length under head and a standard square neck, intended for general fastening applications in light structural, mechanical, and utility installations. Made from Grade 2 steel with a zinc-plated finish, this bolt provides basic corrosion resistance suitable for indoor and mildly corrosive environments. The square neck seats into wood or soft material to prevent rotation during nut tightening. Meets ASTM A307 standards for low-carbon steel externally threaded fasteners. This bolt is a staple in maintenance, construction, and light fabrication work performed by electricians, plumbers, HVAC techs, and general contractors.

This carriage bolt is well-suited for wood-to-wood and wood-to-metal connections in residential and light commercial construction, equipment mounting, and general utility fastening. The 1/4-20 UNC thread pattern is one of the most common coarse-thread sizes, making it compatible with standard nuts, washers, and threaded inserts stocked in most trade shops and supply houses. Typical applications include securing equipment supports, brackets, and framing assemblies where a flush, round-head profile is required on the finished side.

Key Features

• 1/4-20 UNC coarse thread for broad compatibility with standard nuts and hardware
• 6-inch length under head accommodates thicker assemblies and stacked material
• Standard square neck prevents bolt rotation during installation without a wrench on the head
• Grade 2 steel construction meets ASTM A307 requirements for light structural fastening
• Zinc-plated finish provides basic corrosion resistance for indoor and sheltered installations

Compatibility

Designed as a standard 1/4-20 UNC carriage bolt suitable for use with any matching 1/4-20 hex nut, flat washer, or threaded insert conforming to ASME B18.5 carriage bolt standards.

Installation Notes

Installation is typically performed by general contractors, maintenance technicians, or trade professionals during equipment mounting or structural assembly work. Always drill a clean, properly sized clearance hole so the square neck seats fully and prevents spinning. Use a standard wrench or socket on the nut side to tighten; do not strike or damage the round dome head. Verify that the zinc-plated finish is adequate for the service environment, as this coating is not rated for direct outdoor exposure or highly corrosive conditions.