DFCI Solutions Inc.
The original manufacturer of the Quarter-Turn fastener.
Our company has not changed ownership and is still a
Veteran Owned - Small Business.
The Customer is Number One!
Go Green and Save Green!
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.