Black Flanged Ribbed Key Type Hinge Shaft Nut

Core Features

Ribbed Key Slot Configuration – The nut incorporates grooves or slots on the bearing surface that engage with mating ribs on the hinge component. This keyed engagement provides positive rotational locking when the nut is seated, with disengagement achieved by lifting the hinge component to release the rib-slot interface for adjustment.

Integrated Flange – The flange provides a load-bearing surface that distributes clamping force across the workpiece and serves as the bearing surface for the keyed engagement with the hinge component. The flange is integrally formed with the nut body.

Height Adjustment Function – The nut can be rotated along the threaded hinge shaft to adjust the vertical position of the hinge, with the rib-slot engagement securing the adjusted position. Multiple slots may be provided for fine adjustment capability.

Black Surface Treatment – The black finish provides a corrosion-resistant barrier layer with a uniform appearance. Carbon steel configurations are available with black oxide or black nickel coating. Stainless steel versions are available with black staining.

Product Characteristics

The nut is manufactured with a hexagon body, an integrated flange, and a ribbed key slot configuration on the flange bearing surface. The key slots are positioned radially on the flange surface to engage with corresponding ribs on the mating hinge component. The hexagon drive profile allows installation using standard wrenches or sockets.

Thread dimensions and tolerances follow standard metric thread profiles. Material composition is controlled to meet specified strength requirements. Carbon steel grades are available for general applications. Stainless steel options provide enhanced corrosion resistance with black staining surface treatment .

Surface treatment options include black oxide for carbon steel, black nickel plating for carbon steel, and black staining for stainless steel. The black finish provides corrosion resistance and a consistent appearance.

Application Scenarios

Hinge Height Adjustment Systems – Used in door hinge assemblies where vertical adjustment of the door relative to the frame is required. The nut is threaded onto the hinge pin, with the rib-slot engagement locking the adjusted height position .

Furniture and Cabinet Hinges – Applied in furniture hinge assemblies requiring position adjustment capability. The keyed engagement secures the hinge position after adjustment.

Architectural Hardware – Used in building hardware applications where hinge height adjustment is specified and where the black finish provides corrosion resistance and appearance consistency.

Automotive Hinge Assemblies – Employed in vehicle door hinge systems requiring height adjustment capability and corrosion resistance.

Customization Options

Specifications and configurations can be adjusted based on application requirements. Thread sizes, flange dimensions, slot configuration, and overall height are customizable. Material grades include carbon steel for general applications and stainless steel for corrosion-resistant requirements. Surface treatments are selectable according to environmental exposure conditions.

Frequently Asked Questions

Q: How does the ribbed key slot adjustment mechanism work?
A: The hinge component features a rib on its bearing surface that engages with a slot on the nut face, providing rotational locking. For adjustment, the hinge is lifted to disengage the rib from the slot, allowing the nut to be turned freely on the threaded shaft. The hinge is then lowered to re-engage the rib-slot interface, locking the position .

Q: What is the purpose of the black surface treatment?
A: The black finish provides corrosion resistance and a uniform appearance. Carbon steel options include black oxide or black nickel plating, while stainless steel options use black staining. Treatment selection is based on corrosion resistance requirements and environmental exposure conditions .

Q: Are these nuts adjustable without tools?
A: The design allows for manual adjustment by lifting the hinge component to disengage the rib-slot locking interface, then turning the nut by hand on the threaded shaft .

Q: What is the difference between this and a standard flanged nut?
A: The ribbed key slot configuration provides a positive rotational locking feature not present on standard flanged nuts. This enables height adjustment while maintaining secure positioning under load .

Q: Are these nuts available in stainless steel?
A: Yes. Stainless steel options are available with black staining treatment for corrosion resistance in environments where carbon steel is not suitable .

Installation Considerations

The nut should be threaded onto the hinge shaft with the flange oriented toward the hinge component. For adjustment, the hinge component should be lifted to disengage the rib-slot interface, allowing the nut to be rotated to the desired position. The hinge is then lowered to re-engage the rib-slot locking engagement.

Thread condition should be inspected before installation. For plated or coated nuts, coating thickness should be within specified tolerances to maintain thread fit and slot dimensions. When used in outdoor applications, material selection should be based on environmental exposure conditions.