Fortis Manufacturing Pivot and Takedown Pin Nitride Black. Manufacturing it out of 17-4 stainless steel allows us to balance between form and function. This enhanced set is machined with precision technology giving you tight tolerances between yfirearms. Specifications for Fortis Manufacturing Pivot and Takedown Pins: Manufacturer: Fortis Manufacturing Finish: Nitride Condition: New Color: Black Fabric/Material: 17-4 Stainless Steel Weight: 0.34 oz Features of Fortis Manufacturing Pivot and Takedown Pins Mil-spec size tolerance from .247-.2485 Comes in either black nitride coating or case hardened finish Package Contents: Fortis Manufacturing Pivot and Takedown Pins Fortis Manufacturing PINS-TDPIV-BLK: Pivot and Takedown Pin Nitride Black