Precision Thread Plug Gauge - G (BSP) 1/4 x 19

• for checking internal thread conformity with a precision thread plug gauge
• for G (BSP) 1/4 x 19 when the thread designation and tolerance requirement match the drawing or inspection plan
• for GO and NO GO inspection logic in production, maintenance, and incoming goods control
• for verifying a tapped or repaired internal thread before assembly or release

Note Use a plug gauge for internal threads and select a ring gauge when the external thread has to be inspected.

• Plug-gauge construction is intended for internal thread inspection rather than thread cutting.
• GO and NO GO inspection logic supports clear release decisions after machining or repair.
• The thread designation G (BSP) 1/4 x 19 makes the gauge selection transparent for inspection planning.
• Tolerance information in the product name or product data supports drawing-based quality control.

• A plug gauge checks internal threads only, so use a matching ring gauge when an external thread must be inspected.

1. Clean the internal thread before inserting the gauge.
2. Check the thread designation and tolerance against the inspection plan.
3. Insert the GO side gently and verify that it enters according to the applicable inspection method.
4. Apply the NO GO side according to the inspection rule without forcing the gauge.
5. Record the inspection result in the production or maintenance documentation.
6. Clean and protect the gauge after use.

• 1 piece Precision Thread Plug Gauge - G (BSP) 1/4 x 19

• Product type: precision thread plug gauge
• Thread system: G (BSP)
• Thread designation: G (BSP) 1/4 x 19
• Standard: DIN EN ISO 228-2
• Direction: RH
• Package quantity: 1

What does this plug gauge inspect?

It inspects an internal thread for G (BSP) 1/4 x 19 according to the thread designation and tolerance requirement.

Is this gauge for internal or external threads?

It is for internal threads, while external threads require a matching ring gauge or another suitable external-thread inspection tool.

How does GO and NO GO logic help you?

GO and NO GO logic separates acceptance from rejection so the thread can be released or corrected according to the inspection plan.

Can the gauge repair a damaged thread?

No, the gauge only verifies the thread and does not cut, clean, or restore the thread profile.

How do you select the tolerance?

Select the tolerance exactly from the drawing, standard, or inspection plan before choosing the gauge.

What should you do before inspection?

Clean the thread and gauge, then apply the gauge gently without forcing the inspection side into the thread.

Where can you find the thread gauges catalog?

You can find the thread gauges catalog here: VG 23 catalog as PDF