Details
A4-30 is a Dzus Type A oval/button head stud with a 1/4" body diameter and .300" length. Locks with a quarter-turn into a mating Type S4 spring. Used on cowlings, access panels, and engine covers on WWII and vintage aircraft.
Part Number: A4-30
Head Type: Type A Oval
Body Diameter: 1/4" | Length (L): .300"
Tensile Strength: 700 lbs
Material: Heat-treated steel, cadmium plated
Condition: New Surplus
Compatible Springs: Type S4 (heights .200" or .225")
Compatible Grommets: Type GA4 (optional, used to protect panel hole)
Selecting Length: Add panel thickness + grommet height + clearance + spring height, then subtract spring deflection. Choose the stud with "L" dimension nearest to that value.
Photos are for reference only.
Warranty Information
All parts are sold "as-is". Airworthiness to be determined by an appropriately rated certificate holder. No warranty is implied. AirCorps Depot reserves the right to charge a restocking fee when deemed appropriate.
