Spi 13-192-0 Double Square Rule 4 Inch 16R

Product Description

The SPI 13-192-0 is a 4-inch double square rule machined from hardened steel, designed for precise layout and inspection work in trade and industrial environments. It provides four graduation scales on a single blade: 1/100 inch, 1/64 inch, 1/50 inch, and 1/32 inch, making it a versatile single-tool solution for technicians who need multiple measurement references without switching tools. The hardened steel construction resists wear and maintains accuracy under regular shop conditions. Machinists, pipefitters, HVAC fabricators, and sheet metal workers are the primary users of this style of rule.

The 13-192-0 is suited for bench work, layout tasks, and field measurement where a compact, rigid rule is needed. Its 4-inch blade length makes it practical for confined spaces and detailed scribe work. The 16R graduation style is a standard configuration used across mechanical and fabrication trades, fitting into workflows that require both fractional and decimal inch references on the same blade. It is sold individually and is appropriate for tool kits, service vans, and shop benches.

Key Features

• Four graduation scales on one blade: 1/100 in, 1/64 in, 1/50 in, and 1/32 in
• 16R double square graduation style for multi-reference layout work
• 4-inch blade length suited for compact and detailed measurement tasks
• Hardened steel construction for durability and long-term accuracy
• Sold individually, compatible with standard double square heads

Compatibility

Designed as an OEM-style replacement or supplemental blade for standard double square setups used in mechanical, fabrication, and trade layout applications.

Installation Notes

This rule is a hand tool and requires no power-down or system shutoff procedures. Seat the blade securely in the double square head before use and verify the locking mechanism is tight to prevent blade shift during measurement. Keep the blade clean and dry to preserve graduation legibility and resist corrosion. Inspect the hardened steel blade periodically for nicks or burrs that could affect measurement accuracy.