How to Measure Your
Dzus Panel Fastener

Dzus fasteners are one of if not the most popular style panel fastener among the motorsports racing world. Your racecar might even already have Dzus fasteners holding everything secure already.

If you have perhaps lost a few Dzus buttons, broken some springs or wish to add some of these fantastic fasteners to your vehicle, this article is a short guide to help you decide what is the right fit for your panels.

 
Pan-MeasureDirections

Material thickness range for differnt spring heights & button grip length
5/8" Spring (recommended deflection .019" - .039") 3/4" Spring (recommended deflection .019" - .039")
Button grip Length .250 .400
Spring Height #SSS5200 .094 - .114 .244 - .264
Spring Height #SSS3225 .044 - .064 .194 - .214
Button grip Length .250 .400
Spring Height #SSS4200 .069 - .089 .219 - .269
Spring Height #SSS4250 .019 - .039 .169 - .189
1" Spring (recommended deflection .023" - .056")
Button grip length: .400 .450 .500 .550 .600 .650
Spring Height #S5200 .223 - .258 .273 - .308 .323 - .358 .373 - .408 .425 - .458 .473 - .508
Spring Height #S5225 .198 - .233 .248 - .283 .298 - .333 .348 - .383 .398 - .433 .448 - .483
Spring Height #S5250 .173 - .208 .223 - .258 .273 - .308 .323 - .358 .373 - .408 .423 - .458
Spring Height #S5275 .148 - .183 .198 - .233 .248 - .283 .298 - .333 .348 - .383 .398 - .433
Spring Height #S5300 .123 - .158 .173 - .208 .223 - .258 .273 - .308 .323 - .358 .373 - .408
Spring Height #S5325 .098 - .133 .148 - .183 .198 - .233 .248 - .283 .298 - .333 .348 - .383
Spring Height #S5350 .073 - .108 .123 - .158 .173 - .208 .223 - .258 .273 - .308 .323 - .358
Spring Height #S5375 .048 - .083 .098 - .133 .148 - .183 .198 - .233 .248 - .283 .298 - .333
1" Spring (recommended deflection .023" - .056")
Button grip length: .400 .450 .500 .550 .600 .650
Spring Height #S6225 .205 - .248 .255 - .298 .305 - .348 .355 - .398 .405 - .448 .455 - .498
Spring Height #S6250 .180 - .223 .230 - .273 .280 - .323 .330 - .373 .380 - .423 .430 - .473
Spring Height #S6275 .155 - .198 .205 - .248 .255 - .298 .305 - .348 .355 - .398 .405 - .448
Spring Height #S6300 .130 - .173 .180 - .223 .230 - .273 .280 - .323 .330 - .373 .380 - .423
Spring Height #S6325 .105 - .148 .155 - .198 .205 - .248 .255 - .298 .305 - .348 .355 - .398
Spring Height #S6350 .080 - .123 .130 - .173 .180 - .223 .230 - .273 .280 - .323 .330 - .373
Spring Height #S6375 .055 - .098 .105 - .148 .155 - .198 .205 - .248 .255 - .298 .305 - .348
Spring Height #S6400 .030 - .073 .080 - .123 .130 - .173 .180 - .223 .230 - .273 .280 - .323
Spring Height #S6425 .005 - .048 .055 - .098 .105 - .148 .155 - .198 .205 - .248 .255 - .298