Value Collection 781144PS Carriage Bolt 1/4-20 4in Square Neck

Product Description

The VALUE COLLECTION 781144PS is a 1/4-20 carriage bolt designed for general fastening applications requiring a flush, smooth dome head and a square neck that resists rotation during tightening. Constructed from 18-8 stainless steel with a bright, uncoated finish, this bolt offers solid corrosion resistance in wet or outdoor environments. The length under head measures 4 inches, and the thread standard is UNC (Unified National Coarse). Machinists, fabricators, maintenance technicians, and contractors use carriage bolts like this when a nut-and-bolt assembly is needed through wood, metal, or composite materials where the head must sit flush without a wrench on the bolt side.

This carriage bolt suits a wide range of residential and light commercial applications including wood framing, dock construction, equipment mounting, and general structural assembly. The square neck beneath the dome head bites into the mating material to prevent the bolt from spinning when the nut is driven. The 18-8 stainless steel construction makes it appropriate for applications exposed to moisture, salt air, or chemicals where carbon steel fasteners would corrode prematurely.

Key Features

• 1/4-20 UNC thread size for compatibility with standard nuts and hardware
• 4-inch length under head for medium-depth through-bolt applications
• Square neck design locks into substrate to prevent rotation during installation
• 18-8 stainless steel construction provides corrosion resistance in wet and outdoor environments
• Bright, uncoated finish — no plating to chip, flake, or interfere with thread fit

Compatibility

Designed as a standard UNC 1/4-20 carriage bolt suitable for use with any 1/4-20 hex nut, coupling nut, or threaded insert conforming to inch-standard dimensions.

Installation Notes

Carriage bolts are installed by a licensed contractor, maintenance technician, or qualified tradesperson using standard hand or power tools. Always drill a clean pilot hole sized to the bolt shank before driving the bolt through. Seat the square neck firmly into the material so the head pulls flush before threading and tightening the mating nut. Do not over-torque stainless steel fasteners, as galling of the threads can occur — apply anti-seize compound when appropriate.