Swagelok MS-MHSU-IG-1210 Gap Gauge

Swagelok MS-MHSU-IG-1210 Gap Gauge is a precision inspection tool used to confirm that Swagelok tube fittings have been properly made after being pre-swaged or tightened with a Swagelok Multihead Hydraulic Swaging Unit (MHSU). It is sized for 3/4 in and 18 mm female nuts, aligning with a 3/4 in tube size, and is part of Swagelok’s family of gap inspection gauges. The gauge provides a straightforward check that the fitting has reached the correct gap during initial makeup, whether the assembly was completed with the MHSU, an air-actuated unit (AHSU), or by wrench tightening. By standardizing makeup verification, the MS-MHSU-IG-1210 helps ensure consistent performance across installations and supports quality control in both manufacturing and field service. Swagelok catalogs also document a compatible variant for alloy 2507 tubing, MS-MHSU-IG-2507-1210, which extends the gap-check concept to that material. Gap inspection gauges are used to verify that the initial installation pull-up meets Swagelok’s established gap specifications, providing a practical check of fit-up accuracy.