Starrett T436.1XRL-6 W/SLC Outside Micrometer 5-6" Range 0.0001" Graduation with Certification

The Starrett T436.1XRL-6 W/SLC is a Series 436.1 mechanical outside micrometer designed for high-precision measurement of external dimensions in the 5 to 6 inch range. This instrument delivers 0.0001" graduation resolution and includes a Standard Letter of Certification (SLC) for traceability and quality assurance requirements.

Built on Starrett's advanced sleeve design, the T436.1XRL-6 features staggered graduation lines with distinct numerals for fast, accurate reading. The tapered frame allows access to narrow slots and confined workspaces, while the balanced frame and thimble design reduce fatigue during extended use. A combination ratchet stop and speeder provides uniform measuring pressure for repeatable results.

Key Features:

• Measuring Range: 5 to 6 inches (125–150 mm)
• Graduation: 0.0001 inch (vernier scale)
• Anvil & Spindle: Flat, micro-lapped carbide faces for long-term wear resistance
• Spindle Diameter: 1/4 inch, one-piece construction for rigidity and stability
• Lock Nut: Knurled ring-type for secure measurement position retention
• Thimble: Ratchet stop with combination speeder for uniform pressure and faster adjustment
• Finish: Satin chrome — reduces glare and resists corrosion
• Frame: Special cast iron with perforations for reduced weight and ribbing for strength
• Includes: Standard Letter of Certification (NIST-traceable) — suffix W/SLC

The Starrett 436.1 series is widely regarded as one of the most trusted outside micrometers among machinists, toolmakers, and quality control professionals. The W/SLC variant ships with a Standard Letter of Certification, making it suitable for use in regulated manufacturing, aerospace, and metrology environments where documented traceability is required.