Spi 13-897-4 Steel Rule 12 Inch 5R Rigid Black Chrome

Product Description

The SPI 13-897-4 is a rigid steel rule designed for precise linear measurement in trade and industrial applications. Finished in black chrome plating, it measures 12 inches in overall length and 1 inch in overall width, with a thickness of 0.04 inches. The rule features 5R graduation style, providing three scales on a single tool: 1/32 inch, 1/64 inch, and 1/100 inch. The horizontal scale orientation and rigid construction make it suitable for layout, inspection, and fabrication tasks where a flexible rule would introduce error. Weight is 1 pound.

This rule is used in machine shops, fabrication facilities, HVAC sheet metal work, plumbing rough-in layout, and general trade applications where repeatable, accurate measurement is required. The black chrome finish reduces glare and improves readability of graduation marks under shop lighting. The rigid build prevents flexing during use, which is important when measuring against a flat reference surface or scribing a layout line. The 5R graduation style is a common choice for machinists and inspectors who need multiple fractional and decimal inch scales on one rule.

Key Features

• 5R graduation style with 1/32, 1/64, and 1/100 inch scales on one rule
• Black chrome-plated finish reduces glare and protects against corrosion
• Rigid construction prevents flex during measurement and layout
• Horizontal scale orientation for straightforward reading along the rule length
• Steel construction for durability in shop and field environments
• No hook or magnetic features — clean, simple layout tool

Compatibility

Designed as a general-purpose rigid steel rule suitable for machine shop, fabrication, HVAC, plumbing, and inspection applications requiring 1/100, 1/32, and 1/64 inch graduation scales.

Installation Notes

No installation is required for this hand tool. Store flat or in a protective sleeve to prevent damage to the graduation markings and chrome finish. Avoid dropping or bending the rule, as rigid steel rules can crack or lose calibration accuracy if deformed. Clean with a dry or lightly oiled cloth to maintain the finish and prevent rust.