Mandrel 8-32 Thread Size - 3M - Marson

The 3M – Marson 39255 Mandrel is an essential replacement component engineered for professional rivet nut installation tools. Designed for precise 8-32 thread size applications, this precision-machined mandrel ensures accurate pull and reliable thread engagement. It restores optimal performance to your existing rivet nut tools, maintaining consistent installation quality in demanding automotive and industrial environments.

Key Features

• Exact 8-32 Thread Compatibility: Perfectly matches compatible Marson and similar rivet nut tools, facilitating the precise installation of 8-32 threaded inserts. This mandrel is made of steel.
• Durable, Hardened Construction: Engineered for prolonged service life, this steel mandrel resists wear and deformation even in high-cycle repair and assembly operations.
• Precision Threading: Ensures proper grip length, clamp load, and joint integrity, minimizing the risk of cross-threading or premature fastener failure during installation.
• Direct Tool Restoration: Serves as a direct replacement for worn, bent, or stripped mandrels, efficiently bringing essential rivet nut tools back to their original specifications, thereby preventing costly downtime.
• Consistent Fastening Performance: Supports reliable threaded connections in various materials, including steel, aluminum, and composite panel stacks, maintaining consistent installation across repeated cycles.

Applications

The 39255 mandrel is indispensable for installing 8-32 rivet nuts and threaded inserts in a wide array of automotive body panels, structural brackets, under-hood components, and light fabrication projects. It is commonly utilized in collision repair, mechanical service bays, fleet maintenance, and industrial assembly lines where 8-32 fasteners are standard hardware. This replacement part helps professional shops avoid costly downtime by ensuring dedicated rivet nut tools remain operational and accurate after routine wear or over-torque incidents with the original mandrel.

Specifications

• Manufacturer: 3M – Marson
• Model Number: 39255
• Thread Size: 8-32
• Weight: Approximately 1 lb
• Dimensions: Approximately 5 x 1 x 1 in (Length: 4 inches)