DFCI Solutions Inc.
The original manufacturer of the Quarter-Turn fastener.
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When selecting finishes, select the RoHS compliant finishes. They are better for the environment and less expensive!
Quarter Turn - PA-3500 Line
Type 3506-SC stud assemblies consist of a stud and coil spring captive in a steel cup. The assemblies are installed by flaring the end of the cup neck into a countersunk panel hole. Stud locking action compresses the spring, exerting a clamping force on the fastened parts. In locking, the stud spiral cam engages a rigid wire which is offered by the receptacle. MIL-F-25173A** approved.
Click here for Installation Procedures
|Locking Tension:||15 lb|
|Rated Tensile and Shear:||200 lb when used with our receptacles|
Max sheet separation
under tensile overload:
|Locking Torque Min:||2.5 in-lb|
|Locking Torque Max:||8 in-lb|
|Wear endurance:||5,000 use cycles|
|Stud:||Heat treated carbon steel|
|Spring:||Spring temper music wire|
Finishes: Zinc Trivalent Clear .0003 thick. Trivalent Chromate Clear with Sealer (RoHS Compliant)
Specification(s): ASTM-B-633, Type III, SC 2, Clear
Other standard finishes are available as described on the linked page.
* This table assumes the locked stud panel will contact our receptacle strip having a wire depth (Dimension "H") of .150" (3.81 mm).
** Meets the design, physical and performance requirements of MIL-F-25173A. However, full mechanical properties testing may not be performed on each production lot.