Starrett 98-4 Precision Machinist Level 4" Ground and Graduated Vial

The Starrett 98-4 is a precision machinist level built for the demanding accuracy requirements of machine shops, toolrooms, and industrial environments. Featuring a ground and graduated spirit vial, this compact 4" (100mm) level delivers reliable, repeatable readings when aligning machine beds, leveling equipment, and checking surface flatness.

Key Features:

• High-sensitivity vial: Main vial graduations calibrated to approximately 80–90 seconds of arc (0.005" per foot / 0.42 mm per meter)
• Adjustable vial: Ground glass vial is adjustable to a positive setting for custom reference angle calibration
• Satin-finished brass tube housing: Friction-fit closing cover protects the vial from damage and contamination
• Precision-machined cast iron base: Provides stability, rigidity, and lasting durability on flat surfaces
• Full-length involute groove: Specially designed groove along the base provides reliable, centered seating on round work such as pipes, shafts, and conduits
• Single vial (no cross test vial): Compact single-vial design ideal for tight workspaces — 4" (100mm) base length
• Made in the USA: Backed by over 140 years of Starrett precision craftsmanship

The Starrett 98 Series machinist level offers significantly greater accuracy than standard construction levels, making it the preferred choice for metalworking, aerospace, automotive, and manufacturing professionals where tight tolerances are critical. Sold without a case.