What is a go/no-go gauge used for in fastener inspection?

What is a go/no-go gauge used for in fastener inspection?

• A. To measure length
• B. To measure torque
• C. To check color
• D. To verify that threads or bores are within tolerance; a go gauge should fit, a no-go should not fit

Answer: (D)

Go/no-go gauges provide a quick test that a critical dimension stays within the specified limits by using two fixed tests. For threads or bores, the go gauge represents the minimum size that must still fit; if the part accepts the go gauge, it isn’t undersized. The no-go gauge represents the maximum size; the part must not fit this gauge, so it isn’t oversized. When a part fits the go gauge but does not fit the no-go gauge, the feature is within tolerance and should function properly. These gauges aren’t used for measuring length, torque, or color; they specifically check that threads or bores stay within the allowed range, ensuring proper fit and interchangeability.

Go/no-go gauges provide a quick test that a critical dimension stays within the specified limits by using two fixed tests. For threads or bores, the go gauge represents the minimum size that must still fit; if the part accepts the go gauge, it isn’t undersized. The no-go gauge represents the maximum size; the part must not fit this gauge, so it isn’t oversized. When a part fits the go gauge but does not fit the no-go gauge, the feature is within tolerance and should function properly. These gauges aren’t used for measuring length, torque, or color; they specifically check that threads or bores stay within the allowed range, ensuring proper fit and interchangeability.