Spi 13-941-0 Steel Rule 24 Inch 4R Graduation

Product Description

The SPI 13-941-0 is a 24-inch steel rule designed for precision layout and measurement work in machine shops, fabrication environments, and tool-and-die applications. Manufactured from tool steel with a satin chrome-plated finish, it carries 4R graduation markings — 1/16, 1/32, 1/64, and 1/8 inch increments — on a 1-1/8-inch-wide blade. The satin chrome finish reduces glare under shop lighting, making graduation lines easier to read in both natural and artificial light. At 0.0400 inches thick, the blade is rigid enough for accurate scribing and layout transfer. The rule includes a hook end, a useful feature for single-hand referencing against a workpiece edge or datum surface.

This rule suits machinists, toolmakers, sheet metal workers, and precision layout technicians who require a reliable, full-length rigid rule for bench and machine work. The 4R graduation style provides four scales in a standard horizontal orientation, making it suitable for general-purpose measurement tasks across a wide range of part sizes and geometries. The satin chrome plating resists corrosion and maintains legibility over time in typical shop environments.

Key Features

• 4R graduation with 1/16, 1/32, 1/64, and 1/8 inch scales on a single blade
• Tool steel construction for durability and dimensional stability
• Satin chrome-plated finish reduces glare and resists corrosion
• Hook end included for single-hand referencing against a workpiece edge
• Horizontal scale orientation for standard layout and measurement tasks
• Blade thickness of 0.0400 inches provides rigidity without excess bulk

Compatibility

Designed as a general-purpose precision steel rule compatible with standard rule holders, rule stops, and rule clamps that accept 1-1/8-inch-wide blades.

Installation Notes

No installation is required for this hand tool. Store the rule in a protective sleeve or flat drawer to prevent blade damage and preserve graduation legibility. Avoid dropping on hard surfaces, as impact can cause bowing or graduation wear. Periodic light oiling of the blade surface will help maintain corrosion resistance in high-humidity shop environments.