Apex 953FTN Tinner Steel Circumference Rule 3 Ft

Product Description

The APEX 953FTN is a tinner's steel circumference rule designed for layout and fabrication work in sheet metal and HVAC duct applications. The rule reads 36 inches in overall length with a blade width of 1.25 inches and a blade thickness of approximately 0.062 inches. Graduations are marked in 1/8-inch and 1/16-inch increments using laser etching, which resists fading and wear in shop environments. The SAE measurement system and silver steel finish make it easy to read under typical job-site lighting. Sheet metal mechanics and HVAC fabricators rely on this tool to lay out circumference dimensions directly on flat stock before rolling or forming.

The 953FTN is suited for residential and commercial HVAC duct fabrication shops, as well as field installers who cut and fit round or oval duct sections. Tinner's rules of this type are commonly used to determine the flat-pattern circumference of round pipe and fittings, reducing the need for manual calculation when cutting blank stock. The tool is equally useful in metal roofing and general sheet metal work where accurate linear and circumference layout is required.

Key Features

• Laser-etched graduations in 1/8-inch and 1/16-inch increments for lasting readability
• 36-inch overall length covers full-width layout on standard duct blanks
• 1.25-inch blade width provides a stable reference edge for scribing lines
• Steel construction withstands shop and field conditions
• SAE measurement system for standard inch-based fabrication work
• Sold individually — one rule per unit

Compatibility

Designed as a general-purpose tinner's circumference rule for sheet metal and HVAC duct fabrication applications using SAE measurements.

Installation Notes

This tool requires no installation. Sheet metal mechanics and HVAC fabricators should inspect the rule for burrs or bends before use, as blade deformation can affect layout accuracy. Store flat to prevent warping. Keep clear of cutting tools and abrasive surfaces to protect the laser-etched graduation marks.

Technical Specifications

• Overall Length: 36 inches
• Blade Width: 1.25 inches
• Blade Thickness: 0.062 inches
• Graduation: 1/8 inch and 1/16 inch
• Marking Style: Laser Etched
• Measurement Type: SAE
• Material: Steel
• Color: Silver
• Weight: 0.8 pounds
• UPC: 037103450982

Standard Information

• Brand: APEX
• Manufacturer Part Number: 953FTN