Value Collection R63640480 Carriage Bolt 3/8-16 3 in

Product Description

The VALUE COLLECTION R63640480 is a 3/8-16 carriage bolt with a 3-inch length under head, designed for fastening applications that require a smooth, rounded head and a square neck to resist rotation during tightening. Constructed from Grade 18-8 stainless steel with an uncoated finish, this bolt delivers solid corrosion resistance in wet, outdoor, or mildly chemical environments. The UNC (Unified National Coarse) thread standard ensures broad compatibility with standard nuts and tapped holes. This fastener is used by millwrights, plumbers, electricians, and general tradespeople wherever a flush, non-rotating bolt head is required.

This carriage bolt suits a wide range of trade and construction applications, including wood-to-wood, wood-to-metal, and light structural connections. The square neck bites into wood or soft material beneath the head to prevent spinning without requiring a wrench on the bolt head. Grade 18-8 stainless steel makes it appropriate for installations exposed to moisture, including outdoor structures, pool enclosures, and mechanical equipment supports where carbon steel fasteners would corrode prematurely.

Key Features

• 3/8-16 UNC thread for compatibility with standard hardware
• 3-inch length under head for medium-depth fastening applications
• Square neck design prevents bolt rotation during nut tightening
• Grade 18-8 stainless steel construction for corrosion resistance
• Uncoated finish — no plating to chip or flake in service
• Inch measurement system; compatible with standard 3/8-inch hardware

Compatibility

Designed for use with standard 3/8-16 UNC nuts and washers in general-purpose fastening applications across trade and construction work.

Installation Notes

Install with the round head flush against the surface and the square neck seated firmly in the mating material to prevent rotation. Tighten using a wrench or socket on the nut side only. For structural or load-bearing applications, consult applicable building codes and confirm proper torque with a calibrated torque wrench per project specifications. Stainless steel fasteners are susceptible to galling — apply anti-seize compound to the threads when working in high-torque or repeated-assembly situations.