SkyLoc® EXT Studs — Flight-Critical Structural Fastening
Series: QL4S-EXT (Flat Head configuration)
EXT studs feature a 1/4-28 two-lead thread in 4140 cadmium-plated steel, for use in primary and secondary aircraft structures. Available in multiple grip ranges to support varying panel stack-ups.
âš™ Specifications
Grip Range Coverage: 0.18" – 0.85"+ (varies by dash number)
Shank Diameter: 0.2495" – 0.2470"
📋 Typical Dash Numbers
QL4S-EXT2 Grip: 0.18" – 0.29"
QL4S-EXT4 Grip: 0.291" – 0.43"
QL4S-EXT6 Grip: 0.431" – 0.57"
QL4S-EXT8 Grip: 0.571" – 0.71"
QL4S-EXT10 Grip: 0.711" – 0.85"
✓ Applications
- Primary structural panels
- Flight-critical access doors
- Engine nacelle installations
- High-load avionics enclosures
