Carbon Steel Taper Conical Drawn Stamped Nut With Outer Flange

Core Features

Taper Conical Body – The outer surface is formed with a frustoconical taper (typically 1/20 to 1/10 taper rate) that engages a corresponding tapered hole in the workpiece. The taper geometry provides self-centering alignment and creates frictional retention when driven into the hole .

Outer Flange – An integrated flange at the larger-diameter end of the taper portion serves as a positive stop during installation, controlling insertion depth and preventing over-driving into the workpiece. The flange provides a load-bearing surface that distributes clamping force .

Drawn Stamped Construction – Produced through a cold-forming stamping process from carbon steel strip material. The drawn construction provides consistent dimensional accuracy and material grain flow orientation for strength.

Internal Threads – Tapped threads with axes aligned to the taper portion geometry. The thread specifications follow standard metric profiles (e.g., M2 to M10) .

Product Characteristics

The nut is formed with a taper portion having an outer surface that is frustoconical in shape, with the taper rate typically ranging from 1/50 to 1/10 . The flange portion is formed at the outermost end of the taper portion on the larger-diameter side, projecting outward with a flat lower surface perpendicular to the axial direction . This configuration enables press-fit installation into pre-drilled tapered holes in the workpiece.

The flange provides a stopping function when the lower surface contacts the corresponding step or shoulder in the workpiece hole, preventing over-insertion that could deform softer workpiece materials . The taper engagement creates sufficient frictional force to hold the nut in position during subsequent screw fastening operations .

Material composition is controlled to meet specified strength requirements. The nut is typically fabricated from materials harder than the workpiece (e.g., carbon steel for aluminum workpieces). Surface treatment options include zinc plating with various chromate finishes, phosphate coating, and other finishes based on corrosion resistance requirements.

Application Scenarios

Soft Metal Workpieces – Used in aluminum, copper, or other soft metal workpieces where conventional thread tapping may not provide sufficient thread strength. The taper design distributes loads and prevents thread stripping .

Blind Installation Applications – Installed from the accessible side of the workpiece by dropping the nut into a pre-drilled hole and driving it into position . No access to the reverse side is required.

Sheet Metal and Thin Panel Assembly – Applied where load-bearing threads are required in panels too thin for tapping. The taper engagement provides a secure thread receptacle through press-fit installation.

Electronic and Appliance Manufacturing – Used in aluminum housings and enclosures where the taper nut provides a secure thread receptacle. The flange prevents damage to the workpiece material during installation .

Customization Options

Specifications and configurations can be adjusted based on application requirements. Thread sizes are available in metric configurations M2 to M10 . Taper rate and taper portion dimensions are customizable according to application geometry . Material grades include carbon steel for general applications and stainless steel for corrosion-resistant requirements. Surface treatments are selectable according to environmental exposure conditions, including zinc plating, phosphate coating, and other finishes.

Frequently Asked Questions

Q: How does the taper nut installation work?
A: The nut is dropped into a pre-drilled hole with a matching taper portion, then driven using a hammer or press until the flange contacts the workpiece surface. The taper engagement creates friction that holds the nut in position .

Q: What is the purpose of the flange on this nut?
A: The flange provides a positive stop during installation, preventing over-insertion into the workpiece and distributing clamping loads across the bearing surface. It also prevents deformation of softer workpiece materials .

Q: Are these nuts removable after installation?
A: Yes. The taper nut can be removed by lightly striking the head of the mating screw when loosened, which releases the taper engagement from the hole .

Q: What is the recommended taper rate for these nuts?
A: The taper rate typically ranges from 1/50 to 1/10, with 1/20 being optimum for ease of driving and reliable retention. Rates up to 1/6 are applicable but require greater driving force .

Q: What materials are compatible with taper nuts?
A: Taper nuts are suitable for soft metals such as aluminum and copper, as well as wood and plastics. For softer materials, a larger taper rate (1/30 to 1/5) and wider flange are recommended to prevent the nut from biting into the workpiece .

Installation Considerations

The workpiece should be pre-drilled with a hole comprising a taper portion and a step portion matching the nut geometry. The hole taper should be drilled with precision to achieve the specified tight-fit allowance. The nut is dropped into the hole and driven using a hammer or press until the flange lower surface contacts the hole step portion. Installation force should be controlled to prevent deformation of the workpiece. For softer materials, taper rate and flange width should be selected to prevent the nut from biting into the workpiece. Thread condition should be inspected before installation; damaged threads may affect assembly integrity. For plated nuts, coating thickness should be within specified tolerances to maintain fit with the mating screw.