McGuire Glossary of Fastener Terminology

G - 3 terms

GALLING - Often referred to as "Cold Welding", galling most often occurs with stainless steel fasteners when excessive heat generated by thread friction causes localized welding of small high spots on the mating thread surfaces. Continued rotation tears chucks of material from one of the thread surfaces generating a rough, pocked surface condition. When rotation stops some of these welds remain in tact, making threads difficult to disassemble.

GRIP - The actual thickness of the panel or stack up of panel into which the insert is installed. All performance testing of blind threaded inserts should report the grip used, as it can have a significant effect on performance

GRIP RANGE - Range of panel thickness values into which a given part can be properly installed. It is common practice in the blind threaded insert industry to embed the maximum grip into the end of the part.