Rivet Nuts SAE 14-20 UNC Flat Head Thread Insert Rivnut 180pcs Carbon Steel with Yellow zinc Plating Knurl Body?Corrosion ResistanceApplicable for Thin Sheet Metal_

Specification: Head Type: Flat Head Color: Yellow Material: Carbon Steel Surface treatment:Zinc Plating Rivet Nut Size: 1/4''-20UNC Grip Range:0.02-0.10inch Body Diameter:0.388inch Head Height:0.032inch Overall Length:0.612inch Hole Size of the Sheet:0.389min.-0.394max. Use the right tool. “Spin-spin” tool: The rivet nut is threaded onto the mandrel on the pneumatic power tool and then inserted into a hole on the workpiece. When the power tool is activated, the mandrel spins quickly to pull the threaded portion of the shank toward the blind side of the workpiece to form a bulge around the unthreaded portion. When the bulge pushes against the back of the panel, it creates a clamping force to grip the sheet. Once the rivet nut is securely clinched in place, the mandrel spins in the opposite direction to unthread itself from the nut, leaving the rivet nut’s internal threading intact. “Spin-pull” tool: Similar to the “spin-spin” tool, an air motor is used to thread the nut onto the mandrel. When the rivet nut is inserted into the workpiece, hydropneumatic pressure is used to pull the mandrel back a set distance in order to set it. Then, the air motor is re-engaged to pull the mandrel out of the rivet nut. These tools are great for plastic workpieces. “Pull-to-pressure” tool:his tool works the same as a “spin-pull” tool except that instead of pulling to a specific distance, it pulls to a set pressure. When the fastener is placed into the workpiece, hydropneumatic pressure is used to pull back the mandrel. Then, when the preset pressure is achieved, the air motor backs the mandrel out of the nut. If you are fastening metal or a hard plastic, a “pull-to-pressure” tool is ideal and consistent.