Pan head plum barrel nut

Cold heading process is one of the new processes for pressure machining of less or no cutting
metal. It is a processing method that utilizes the plastic deformation of metal under the action of
external forces, and with the aid of molds, redistributes and transfers the volume of metal to form
the required parts or blanks. The cold heading process is most suitable for producing standard
fasteners such as bolts, screws, nuts, rivets, and pins.etc

Pan Head Plum Barrel Nut – Overview

A pan head plum barrel nut (also called a cross dowel nut or barrel nut) is a specialized fastener designed for creating strong, hidden joints in furniture, machinery, and structural assemblies. It combines a pan head screw with a cylindrical (barrel-shaped) nut, allowing perpendicular fastening for sturdy connections.

Key Characteristics:

1. Pan Head Design

Shape: Slightly rounded top with a flat underside for even load distribution.
Drive Type: Typically features a slotted, Phillips, or hex drive for installation.
Low Profile: Provides a semi-flush finish when tightened.

2. Barrel Nut (Plum Barrel) Body

Cylindrical Shape: Resembles a small metal barrel with a threaded hole perpendicular to its length.
Internal Threading: Accommodates a mating screw or bolt that passes through an adjoining piece.
Material: Usually made from steel (zinc-plated or stainless), brass, or aluminum for durability.

3. Function & Mechanism

Used in cross-dowel jointing, where a screw is driven sideways into the barrel nut, creating a strong right-angle connection.
The pan head screw clamps components together, while the barrel nut provides a hidden anchoring point inside a pre-drilled hole.

Installation Steps (Typical Use):

Drill a Hole – Create a perpendicular bore for the barrel nut.
Insert the Barrel Nut – Place it inside the hole, aligning the internal threads.
Drive the Pan Head Screw – Tighten the screw through the adjoining piece into the barrel nut.