Boeing/Douglas Stump type Lockbolts are full tension rated fasteners designed for use in drill-riveter automation equipment. The fasteners are Titanium at 95ksi shear strength and available in several head styles as listed below. These fasteners are designed using the Huck groove proportioned (GP) configuration. Huck Part Numbers italicized below.

3D0018 (GPS6TC) 100º Tension, (MS20426) flush crown head stump Lockbolt

3D0019 (GPS4TC) 100º Shear, flush crown head stump Lockbolt

3D0020 (GPS8TP) Tension, protruding head stump Lockbolt

Mechanical Performance Requirements

per Douglas Specification 23D0007