Hillman Fasteners 461382 Underlayment Nail 1-7/8 in 4D

Product Description

The HILLMAN FASTENERS 461382 is a 1.875-inch (4D) underlayment nail designed for securing subfloor and underlayment materials in residential and light commercial flooring installations. Sold in a box of 12 pounds, these nails are sized to drive through standard underlayment panels without overdriving or splitting the board. The 4D designation indicates a standard nail size widely recognized in flooring and carpentry trades. Flooring installers, carpenters, and general contractors typically keep this fastener on hand for high-volume underlayment work where consistent nail length and holding power matter.

This nail is suited for applications where underlayment panels — such as lauan, felt backer, or similar sheet goods — are fastened to wood subfloor decking. The 1.875-inch length provides sufficient penetration into the subfloor to hold the underlayment flat and prevent movement or squeaking under finished floor surfaces. This fastener is a common choice in new construction and remodel flooring projects where nailing by hand or pneumatic hammer is standard practice.

Key Features

• 4D designation at 1.875 inches for consistent sizing across flooring applications
• Box quantity of 12 pounds supports high-volume installations without frequent restocking
• Sized to penetrate underlayment and bite into subfloor decking without overdriving
• Standard nail geometry compatible with hand nailing and pneumatic nailers

Compatibility

Designed as an OEM-style replacement fastener for standard underlayment nailing applications in residential and light commercial flooring installations.

Installation Notes

Installation is typically performed by flooring contractors or carpenters. When fastening underlayment, ensure the subfloor is clean, flat, and structurally sound before driving nails. Nail spacing should follow the underlayment manufacturer's recommendations and applicable local building codes. Avoid overdriving nails, as countersunk fasteners can telegraph through finished floor surfaces.