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TENGHUI provides precision hardware insertion services for custom sheet metal parts, enclosures, panels, brackets, chassis, and fabricated assemblies.
Self-clinching nuts, studs, standoffs, rivet nuts, threaded inserts, and blind rivets are accurately installed according to your technical drawings and structural requirements. Every application is engineered around sheet material, thickness, hole tolerances, edge distance, and required push-out/torque-out performance.
Upload your DXF, DWG, PDF drawings, or 3D STEP files with fastener specifications for rapid 24-hour evaluation.
Professional hardware insertion creates strong, reliable threads and permanent fixing points in thin sheet metal. Review the complete specifications and engineering design requirements for each fastener category below.
Create strong, wear-resistant reusable female threads in thin sheet metal where tapping is structurally impractical.
Commonly specified for control panels, power enclosures, chassis covers, and mounting brackets.
Provide permanently mounted external male threads for attaching components without needing loose bolts or welding.
Ideal for mounting circuit boards, access covers, cable management brackets, and electrical ground points.
Create fixed spacing clearances and threaded mounting points combined in a single pressed hardware unit.
Widely utilized for multi-layer PCB stacking, display modules, electronic chassis, and component clearance.
Provide heavy-duty load-bearing threads installed from a single side in hollow profiles and closed tubing.
Enclosed structural frames, box tubes, server cabinets, and assemblies with no rear physical access.
Permanently join two or more sheet metal components together rapidly when rear access is completely restricted.
Appliance panels, ventilation ducting, equipment covers, and lightweight frames where welding is unnecessary.
Thin sheet metal often cannot provide enough thread engagement for a reliable tapped hole. Installed hardware creates durable threads, fixed mounting points, or permanent joints without increasing overall material thickness.
Establish strong, wear-resistant metric or imperial threads directly in thin sheet metal without stripping or galling during repeated maintenance cycles.
Eliminate loose hardware pieces and separate loose assembly components during final integration and field maintenance, preventing lost fasteners.
Streamline downstream assembly steps and speed up integration for operators and field technicians by allowing one-sided blind wrenching.
Ensure precise standoffs, stable mounting points, and accurate component clearance between circuit boards, display modules, and chassis walls.
Deliver consistent structural reliability and dimensional accuracy across one-off functional prototypes as well as high-volume production batches.
Replace complex spot welding or weld-stud methods with clean mechanical fastening when more suitable, avoiding thermal distortion and burn-through.
Sheet metal assemblies can be manufactured from a wide variety of engineering metals. When different metals are combined in one assembly, material compatibility, welding method, fastener material, surface treatment, and galvanic corrosion should be considered during design review.
5052, 5754, 5083, 6061-T6
Lightweight, corrosion-resistant material widely specified for electronic enclosures, internal chassis brackets, and structural frames.
SUS301, SUS304, SUS316, 316L
Offers superior mechanical strength, excellent corrosion resistance, and clean cosmetic brushed finishes for demanding outdoor environments.
SPCC, DC01, SPHC, Q235, Q355
Smooth surface quality and exceptional formability. Highly cost-effective structural steel for heavy-duty assemblies, baseplates, and chassis frames.
SECC (Electro), SGCC (Hot-Dip)
Coated with protective zinc for enhanced anti-corrosion performance while maintaining smooth surface aesthetics for internal structural partitions.
T2 Pure Copper, C110, H62, H65
Selected for power distribution applications requiring superior electrical conductivity, grounding straps, busbars, or decorative architectural trims.
Fastener selection should be based on the required thread, sheet material, loading condition, assembly method, corrosion environment, and production quantity.
| Hardware Type | Typical Purpose | Important Design Factors |
|---|---|---|
| Self-clinching nut | Reusable female thread | Sheet hardness, thickness, hole size and edge distance |
| Self-clinching stud | Permanently mounted male thread | Stud length, thread size, installation direction and clearance |
| Self-clinching standoff | Fixed spacing and threaded mounting | Standoff height, thread type, sheet thickness and assembly space |
| Rivet nut | Thread in thin or enclosed components | Grip range, hole size, head style, torque and access |
| Blind rivet | Permanent sheet metal joint | Rivet diameter, grip range, material combination and joint access |
Thread gauging, torque testing, push-out testing, or pull-out testing can be evaluated when these requirements are specified before quotation.
Available options include self-clinching nuts, threaded studs, through/blind standoffs, rivet nuts, threaded inserts, and blind rivets. Custom-specified hardware, captive panel screws, cable tie mounts, and spring-loaded plungers can also be reviewed and installed according to your 2D manufacturing drawings.
Yes. However, the installed fastener must be harder than the host sheet metal to achieve proper cold-flow mechanical clinching. For stainless steel sheets, hardened stainless fasteners (such as A286 / SP-series PEM fasteners) are required. The exact metal combination is verified against the fastener manufacturer's hardness and thickness specifications.
A self-clinching nut is pressed flush into a pre-drilled or punched hole using hydraulic press tooling, requiring physical access to both sides of the sheet. A rivet nut (blind insert) is installed using a pneumatic pull tool that collapses a tubular sleeve from a single side, making it the ideal choice for hollow tubing, closed extrusions, or fully welded box chassis with limited rear access.
It depends on hardware location, press tooling access, bend radius clearance, and mechanical interference risks. Installing hardware in the flat sheet before CNC bending is faster and more cost-effective. However, fasteners located close to a bend relief or inside narrow channels are pressed after forming using specialized offset tooling arms to avoid collision.
Most self-clinching fasteners are installed before finishing to ensure complete surface coverage and corrosion protection. In cases where electrical grounding continuity or cosmetic exterior requirements dictate, hardware can be pressed post-coating, provided the hole is masked or sized to account for film thickness without cracking the finish.
Yes. We frequently install genuine brand-name fasteners (such as PEM®, Southco®, and Dirak®) or verified high-precision equivalents based on your bill of materials (BOM). Any equivalent substitute must undergo dimensional verification and push-out/torque-out testing before volume production.
Yes. Destructive push-out, pull-through, and rotational torque retention testing can be performed in-house. Please specify your required proof loads (kN/lbf) or test frequency during the quotation stage so our quality assurance team can document formal inspection certificates.
Fastener positional accuracy is primarily determined by the laser-cut or CNC-punched mounting hole, which typically holds tolerances within ±0.05 mm to ±0.1 mm. Final installed position can also be influenced by bend sequence tolerances, press tonnage, and sheet flatness. Critical mounting datums should be indicated clearly on your 2D print.
If you have any questions or would like to book a session please contact us.
Once we receive your design files, our senior manufacturing engineers will manually perform a comprehensive DFM review and deliver an accurate, optimized quote within 24 hours.
