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Self-Eject 1/4 Turn Stud Assembly, 5/16 Dia x 0.52 Length

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With these captive quarter-turn Dzus assemblies, you won't have to worry about losing expensive body fasteners. The flat-head 5/16" diameter stud is permanently assembled to a compact mounting plate. The stud is spring-loaded to pop up from the plate when not fastened. This self-ejecting feature makes it easy to spot any studs that have not been latched. It also prevents any unfastened studs from hanging up on the mating surface, making it easier to install large body panels that have many fasteners.

The plated steel stud assembly is designed to be riveted to a panel using two 1/8" diameter rivets spaced 1" center-to-center. With proper mounting the rated strength is 85 lb. in tension and 200 lb. in shear. Overall stud length: .52 inch. Nominal (working) length: .40 inch. Head diameter 5/8". Sold individually; spring receptacles are sold separately. See chart below to determine the correct spring for your application.

To find the required spring receptacle size:
Measure the total thickness of all panels to be fastened together. Add in any space between the panels caused by rivet heads holding the panels apart. Find your total thickness in the table below.

Total Thickness
of Panels to Be Fastened
Spring Receptacle Required
with 3004 Stud
0.120" - 0.149" 0.275" Spring Receptacle
Part No. 3013
0.150" - 0.174" 0.250" Spring Receptacle
Part No. 3012
0.175" - 0.199" 0.225" Spring Receptacle
Part No. 3011
0.200" - 0.224" 0.200" Spring Receptacle
Part No. 3010

Still can't figure it out?
As a quick "cheater" trick, order the shortest spring receptacle (Part No. 3010). If the assembly is not tight enough, simply add spacing washers between the spring and the panel. This moves the spring away from the stud assembly, taking up the slack.

Part No.
Stock Status

Condition: New

1 to 9: $2.39 

10 to 99: $2.29 

100 to 999: $2.19 

1000 & up: call    

In Stock

Direct fit for my app


A bought a number of these for my FV as direct replacements for existing fasteners. Rep at Pegasus helped a lot with selection as there are many sizes of these. These were a direct fit, though before fitting the correct spring it was a bit difficult to get the stud locked and one actually broke. Quality may not be what they once were. Once the spring was matched it functions fine.


Buffalo, NY


Right the first time


After talking to one of the tech specialists, I got the right product and his suggestion of how to insure correct load was spot on


Beverly Hills, MI


great product


As usuall pegasus racing supplies great products at a great price..zues fasnters with customer service to help w choices,cant beet em!!

rock buggy joe

dixon ca.


The best way to fasten body panels shy of welding them


Easy as it comes, this product is a valuable time saver when in the paddock, pit lane, or even at the shop.

Matt Schneider

Glendale, CA


Self-Eject 1/4 Turn Stud Assembly, 5/16 Dia x 0.52 Length

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