Apex 954FTN Tinner Steel Circumference Rule 4 Ft

Product Description

The APEX 954FTN is a tinner's steel circumference rule designed for sheet metal layout work in HVAC fabrication and ductwork. The 48-inch blade reads both standard linear measurements and circumference values, allowing technicians to calculate pipe and fitting diameters directly from a flat-wrap measurement without secondary math. The blade is laser etched with dual graduations of 1/8 inch and 1/16 inch for clear, permanent markings that resist wear in shop environments. At 1.25 inches wide and 0.062 inches thick, the blade is rigid enough for consistent flat-lay readings while remaining easy to handle.

This rule is suited for HVAC sheet metal shops, duct fabrication facilities, and field service work where tinners and HVAC installers need to size round duct, fittings, and spiral pipe. The SAE measurement format makes it appropriate for standard domestic trade applications. It is sold as a single unit and is a hand tool used directly by the technician during layout and measurement tasks.

Key Features

• Laser-etched markings resist fading and wear in shop use
• Dual graduation scale: 1/8 inch and 1/16 inch for fine layout accuracy
• Circumference scale allows direct diameter calculation from wrap measurement
• Full 48-inch blade length covers large-diameter duct and fittings
• Steel construction provides rigidity and durability on the shop floor
• SAE measurement system for standard domestic trade use

Compatibility

Designed as a general-purpose tinner's layout rule for use in residential and commercial HVAC sheet metal fabrication and ductwork installation.

Installation Notes

This is a hand measurement tool requiring no installation. Sheet metal technicians and HVAC fabricators use this rule during layout and cutting operations. Keep the blade clean and straight to maintain measurement accuracy. Store flat to prevent warping or bending of the steel blade.

Technical Specifications

• Blade Length: 48 inches
• Blade Width: 1.25 inches
• Blade Thickness: 0.062 inches
• Graduation: 1/8 inch and 1/16 inch
• Marking Style: Laser Etched
• Material: Steel
• Measurement Type: SAE
• Color: Silver
• Weight: 1 pound
• UOM: Each

Standard Information

• Brand: APEX
• Manufacturer Part Number: 954FTN