Spiral Knurl Press-In Stud
Products Description
Spiral Knurl Press-In Studs mainly consist of the following parts:
External thread connection area
Spiral knurled locking area
Guiding press-fit area
Head positioning structure
Anti-rotation engagement structure
The core design is located in the spiral knurled area.
Unlike ordinary straight knurling, spiral knurling creates a continuous guiding and locking effect during press-fitting, allowing for controlled plastic flow of the metal material, resulting in a larger contact area and a more stable mechanical interlocking structure.
This design significantly improves the product's:
Pull-out resistance
Torsion resistance
Vibration resistance
Long-term stability
Design Advantages: Structural Restructuring from "Passive Tolerance" to "Precise Rheology"
| Progressive Guided Feed Section | The Twist-Clinch Fastener's bottom is designed with a precise tapered guide head. This is not a simple chamfer, but a slightly tapered introductory zone. It pre-expands and rounds the substrate orifice during the initial press-fit stage, ensuring the stud enters the hole perpendicularly and preventing unilateral tooth overload and board warping caused by eccentric press-fit. |
| Arched Transition from Tooth Top to Tooth Bottom | The cross-sectional shape of the helical knurling is crucial. We design the tooth top with a certain width of flat top or micro-arc to increase the contact area with the substrate and reduce specific pressure; the tooth bottom uses a large arc transition to avoid fatigue fracture at the Spiral Knurl Press-In Stud root caused by stress concentration, while providing smoother accommodation space for substrate flow. |
| Anti-rotation friction ring on the lower surface of the head | In the area where the bottom surface of the Twist Press Rivet Stud head (flange face) contacts the sheet metal, we designed fine concentric ring patterns or knurling. When pressed into place, the flange face presses tightly against the sheet metal, and the ring patterns bite into the surface of the substrate, providing additional anti-rotation friction, forming a "double insurance" anti-rotation system with the spiral knurling. |
Production Process: Full-process traceability
Wire Rod Inspection: Chemical composition spectral analysis, tensile mechanical property testing.
Multi-station Cold Forging: Forming the head, knurled root diameter, and thread root diameter.
Spiral Knurling: Dedicated knurling machine; dies are changed regularly to ensure tooth profile consistency.
Thread Rolling: Precision control of thread rolling wheels; online inspection with go/no-go gauges.
Heat Treatment: Continuous mesh belt furnace; automatic carbon potential control; hardness sampling inspection.
Surface Treatment: Drum electroplating or rack plating; coating thickness tested by X-ray fluorescence.
Key Features and Product Advantages: Injecting Absolute Certainty into Precision Assembly Compliance
Eliminating the Pain Point of Coating Degradation
No welding required, perfectly preserving the surface corrosion integrity of sheet metal parts (such as galvanized sheets, pre-coated sheets, and insulation boards), eliminating weld spatter and heat-affected zones, improving overall machine appearance and corrosion resistance lifespan.
High-Efficiency Blind-End Single-Sided Anchoring
Permanent thread anchoring is achieved by applying pressure from only one side, eliminating the need for backfill space. For enclosed profiles and tubular structures, this is the only high-efficiency internal thread solution, greatly simplifying the assembly process for Twist Press-In Fastener.
Maintenance-Free Lifetime Loosening Prevention
The strong vibration resistance provided by the helical topology interlocking ensures that the connection requires no re-tightening throughout the entire equipment lifespan, eliminating poor electrical contact or mechanical noise caused by thread loosening.
Extremely low material and equipment costs
It replaces expensive welding equipment and consumables, eliminates the tapping process and the management of loose parts such as floating nuts, and a single Spiral Knurl Press-In Pin can achieve the function of a high-strength nut, resulting in a sharp drop in overall assembly costs.
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If your Spiral Knurled Clinch Stud involves thin-plate joining, high-vibration environments, or automated assembly requirements, our engineering team can provide you with a one-stop crimp fastener solution, from selection optimization to mass production, based on the plate type, installation conditions, and structural load requirements.
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