Dzus fastener selection guide

Material thickness range for various spring heights & button grip lengths

Material thickness measurement should include Dzus Back Plate if used

1″ Spring (recommended deflection .023″ – .056″)
Button length: .400″ .450″ .500″ .550″ .600″ .650″
Spring Ht .200″ .223″ - .258″ .273″ - .308″ .323″ - .358″ .373″ - .408″ .425″ - .458″ .473″ - .508″
Spring Ht .225″ .198″ - .233″ .248″ - .283″ .298″ - .333″ .348″ - .383″ .398″ - .433″ .448″ - .483″
Spring Ht 250.” .173″ - .208″ .223″ - .258″ .273″ - .308″ .323″ - .358″ .373″ - .408″ .423″ - .458″
Spring Ht .275″ .148″ - .183″ .198″ - .233″ .248″ - .283″ .298″ - .333″ .348″ - .383″ .398″ - .433″
Spring Ht .300″ .123″ - .158″ .173″ - .208″ .223″ - .258″ .273″ - .308″ .323″ - .358″ .373″ - .408″
Spring Ht .325″ .098″ - .133″ .148″ - .183″ .198″ - .233″ .248″ - .283″ .298″ - .333″ .348″ - .383″
Spring Ht .350″ .073″ - .108″ .123″ - .158″ .173″ - .208″ .223″ - .258″ .273″ - .308″ .323″ - .358″
Spring Ht .375″ .048″ - .083″ .098″ - .133″ .148″ - .183″ .198″ - .233″ .248″ - .283″ .298″ - .333″

 

1-3/8”spring (recommended deflection .030” – .073”)
Button length: .400″ .450″ .500″ .550″ .600″ .650″
Spring Ht .225″ .205″ - .248″ .255″ - .298″ .305″ - .348″ .355″ - .398″ .405″ - .448″ .455″ - .498″
Spring Ht .250″ .180″ - .223″ .230″ - .273″ .280″ - .323″ .330″ - .373″ .380″ - .423″ .430″ - .473″
Spring Ht .275″ .155″ - .198″ .205″ - .248″ .255″ - .298″ .305″ - .348″ .355″ - .398″ .405″ - .448″
Spring Ht .300″ .130″ - .173″ .180″ - .223″ .230″ - .273″ .280″ - .323″ .330″ - .373″ .380″ - .423″
Spring Ht .325″ .105″ - .148″ .155″ - .198″ .205″ - .248″ .255″ - .298″ .305″ - .348″ .355″ - .398″
Spring Ht .350″ .080″ - .123″ .130″ - .173″ .180″ - .223″ .230″ - .273″ .280″ - .323″ .330″ - .373″
Spring Ht .375″ .055″ - .098″ .105″ - .148″ .155″ - .198″ .205″ - .248″ .255″ - .298″ .305″ - .348″
Spring Ht .400″ .030″ - .073″ .080″ - .123″ .130″ - .173″ .180″ - .223″ .230″ - .273″ .280″ - .323″
Spring Ht .425″ .005″ - .048″ .055″ - .098″ .105″ - .148″ .155″ - .198″ .205″ - .248″ .255″ - .298″

 

Button & Spring Selection Example

Using the above charts you can easily select the correct Dzus Button and Spring combination. Below are a few examples:

Installing a panel with a weld plate

Panel thickness: .117″
Weld Plate thickness: .060″
Total Thickness: .177″

Possible Options:

Using a 1-3/8″ Spring I will need a .375″ High Spring & a .500″ Dzus Button or I could use a .425″ Spring with a .550″ Dzus Button

 Installing a panel with a weld plate

Panel thickness: .080″
Weld Plate thickness: .060″
Total Thickness: .140″

Possible Options:

Using a 1″ Spring I will need a .300″ High Spring & a .400″ Dzus Button or I could use a .350″ Spring with a .450″ Dzus Button