皿ボルト

冷間圧造加工は、切削の少ない、あるいは切削を必要としない新しい圧造加工のひとつである。
金属。の作用による金属の塑性変形を利用した加工法である。
外力を受け、金型の助けを借りて、金属の体積を再分配し、移動させる。
必要な部品やブランクを製造します。冷間圧造工程は、標準的な
ボルト、ネジ、ナット、リベット、ピンなどの留め具。

Pan Head Plum バレルナット – Overview

A pan head plum barrel nut (also called a クロスダボナット または 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.

主な特徴

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.

• 素材： 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.

• について pan head screw clamps components together, while the barrel nut provides a hidden anchoring point inside a pre-drilled hole.

Installation Steps (Typical Use):

1. Drill a Hole – Create a perpendicular bore for the barrel nut.

2. Insert the Barrel Nut – Place it inside the hole, aligning the internal threads.

3. Drive the Pan Head Screw – Tighten the screw through the adjoining piece into the barrel nut.