Starrett 689-3Z Countersink Gage Range - 360-.560

The Starrett 689-3Z Countersink Gage is a precision inspection tool engineered to accurately measure countersink diameters in the .360" to .560" range. Designed for machinists, quality control technicians, and toolroom professionals, this gage ensures countersunk holes meet exact dimensional requirements for consistent part quality and proper fastener seating.

Key Features:

• Measuring range: .360" – .560"
• Precision cone-shaped contact point conforms to countersink geometry for accurate diameter readings
• Sturdy construction consistent with Starrett's century-long reputation for metrology-grade tooling
• Easy to read graduation markings for quick, reliable inspection results
• Compact design for convenient use at the machine or inspection bench
• Ideal for checking countersinks on aerospace, automotive, and general manufacturing components

The Starrett 689-3Z is part of the trusted Starrett 689 Series of countersink gages, offering a reliable solution for verifying countersink diameters to tight tolerances. Whether used in production environments or toolroom settings, this gage delivers the precision and durability that Starrett instruments are known for worldwide.