Precision Threading Limit Plug (Tol. 6H) - M 18 x 2.5 by VLKEL

A Gewinde-Grenzlehrdorn is a blend of a Gutlehrdorn and an Ausschusslehrdorn. The Ausschuss side of the Gewindelehrdorn bears a red ring. The Gut side should manually (without extra effort) screw into the cut thread of a workpiece. If not possible, the thread doesn't meet the desired standards (Ausschuss). The Ausschuss side can manually screw in up to two turns. More than that indicates the thread doesn't meet the desired standards. The reference temperature for workpieces and gauges is 20°C. VÖLKEL offers a factory calibration certificate upon request. Independent lab calibration follows set standards (DIN, ISO, ANSI) on IAC-Gewindescannern.

• Gewinde-Grenzlehrdorn: A Combination of Gut and Reject
• Reject Side Marked with Red Ring
• Insert Good Side Manually into Cut Thread
• Reject Side Allows Max Two Manual Revolutions
• Reference Temperature: 20°C for Parts and Gauges