null
AirCorps Depot
Skip to main content

Call us! 218-441-5854

Type A Dzus Stud Fastener

A5-40 Dzus Stud - 5/16" Body Diameter .400" Length

SKU: A5-40
$3.45

A5-40 is a Dzus Type A oval/button head stud with a 5/16" body diameter and .400" length. Locks with a quarter-turn into a mating Type S5 spring. Used on cowlings, access panels, and engine covers on WWII and vintage aircraft.

Part Number: A5-40
Head Type: Type A Oval
Body Diameter: 5/16" | Length (L): .400"
Tensile Strength: 1000 lbs
Material: Heat-treated steel, cadmium plated
Condition: New Surplus

Compatible Springs: Type S5 (heights .200" or .225" (also available in .300" and .325" heights))
Compatible Grommets: Type GA5 (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.

Details

A5-40 is a Dzus Type A oval/button head stud with a 5/16" body diameter and .400" length. Locks with a quarter-turn into a mating Type S5 spring. Used on cowlings, access panels, and engine covers on WWII and vintage aircraft.

Part Number: A5-40
Head Type: Type A Oval
Body Diameter: 5/16" | Length (L): .400"
Tensile Strength: 1000 lbs
Material: Heat-treated steel, cadmium plated
Condition: New Surplus

Compatible Springs: Type S5 (heights .200" or .225" (also available in .300" and .325" heights))
Compatible Grommets: Type GA5 (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.

Related Products

© 2026 AirCorps Aviation, LLC, All Rights Reserved.