Starrett 50087 Combination Square Blade 12 Inch 16R

Product Description

The STARRETT 50087 is a 12-inch replacement blade for combination squares, graduated to the 16R scale with markings at 1/100, 1/64, 1/50, and 1/32 inch increments. Constructed from steel with a satin chrome finish, the blade measures 1 inch wide and 0.09 inches thick, providing the rigidity needed for accurate layout and measurement work. It is designed to seat in a standard combination square head, giving machinists, pipefitters, and general tradespeople a precise reference edge for scribing, depth checks, and 90-degree transfers. The satin chrome finish reduces glare and resists corrosion in shop environments.

This blade suits residential and light commercial trade work wherever a combination square is the layout tool of choice. Common applications include marking cut lines on conduit, pipe, or structural material, checking squareness on framed assemblies, and scribing reference lines on metal or wood substrates. Electricians, plumbers, sheet metal workers, and HVAC installers who rely on combination squares for field layout will find this blade a direct drop-in replacement for a worn or damaged original.

Key Features

• 12-inch blade length suits standard combination square heads
• 16R graduation with 1/100, 1/64, 1/50, and 1/32 inch increments for versatile layout tasks
• 1-inch blade width provides a stable reference edge
• 0.09-inch blade thickness delivers rigidity without excessive weight
• Satin chrome finish minimizes glare and resists shop-environment corrosion
• Steel construction for durability under repeated field use

Compatibility

Designed as an OEM-style replacement blade for combination squares accepting a standard 12-inch steel blade.

Installation Notes

Replacement blades are seated and secured by the locking screw on the combination square head. Loosen the head locking screw fully before sliding the old blade out and the new blade in. Confirm the blade seats flush against the head reference face before retightening. No special tools or code compliance is required for this swap, but verify graduation orientation matches the intended measurement direction before putting the square back into service.