dc-energies
Filter
Showing 1–30 of 49 results
| Brand | DC-Energies |
|---|---|
| Model | DC 780 |
| Origin | Hubei, China |
| Manufacturer | Wuhan DC-Energies New Energy Co., Ltd. |
| Type | Benchtop Electrolyzer Test System |
| H₂/O₂ Flow Measurement Accuracy | ±1% FS |
| Operating Pressure Range | 1–10 bar (adjustable via high-precision back-pressure regulator) |
| Temperature Control Stability | ±0.5 °C |
| Data Acquisition Rate | 5 Hz |
| Flow Control | Mass Flow Controllers (MFCs) for H₂ and O₂ |
| Software Compliance | Audit Trail Ready, User Access Levels, Test Parameter Locking (GLP/GMP-aligned architecture) |
| Brand | DC-Energies |
|---|---|
| Model | DC 880 |
| Origin | Wuhan, China |
| Category | Electrochemical CO₂ Reduction (CO₂RR) Flow Cell Test System |
| Gas Flow Control | Anode-side CO₂/N₂/H₂ and cathode-side liquid/gas flow management |
| Backpressure Regulation | Manual dual-chamber (anode/cathode) pressure control up to 10 bar |
| Temperature Control | Heated/insulated tubing & CO₂RR flow cell fixture (ambient to 80 °C, ±0.5 °C stability) |
| Pressure Monitoring | Integrated digital pressure transducers (0–10 bar, 0.01 bar resolution) |
| Compatibility | Requires external potentiostat/galvanostat for Faradaic efficiency, long-term stability, and product quantification assays |
| Compliance | Designed for ASTM D7467-22 (electrochemical gas-phase reaction systems), ISO 17025-compliant test environment support |
| Brand | DC-Energies |
|---|---|
| Model | DC ID-4000 |
| Dispersion Capacity | ≤4000 µL |
| Ultrasonic Frequency | 30 kHz |
| Ultrasonic Duration | 0–1000 s |
| Ultrasonic Interval | 10–100 s |
| Shear Speed | 0–8000 rpm |
| Shear Duration | 0–1000 s |
| Shear Interval | 10–100 s |
| Cycles | 1–100 |
| Vacuum Level | −0.1 MPa |
| Power Consumption | <500 W |
| Control Interface | 7-inch capacitive touchscreen |
| Brand | dc-energies |
|---|---|
| Model | DC IS-200 |
| Maximum Coating Area | 190 × 190 mm² |
| XY Travel Range | 190 × 190 mm |
| Z-Axis Manual Adjustment Range | 50 mm |
| Pneumatic Atomization Nozzle | High-Precision Imported |
| Heating Capability | >100 °C with Vacuum-Assisted Substrate Holding |
| Control Interface | Touchscreen Programmable Controller |
| Applicable Processes | GDE, CCM, Thermal Transfer Coating |
| Liquid Utilization Efficiency | >95% |
| Compliance | Designed for R&D and Pilot-Scale Electrode Fabrication under GLP-Informed Lab Practices |
| Brand | dc-energies |
|---|---|
| Model | DC TP-100 |
| Max. Hydraulic Force | 10 t (≈39.2 MPa on 5×5 cm² area) |
| Temperature Range | 50–350 °C (dual-zone heating) |
| Pressure Control | Digital Display, Four-Column Uniform Load Architecture |
| Compliance | Designed for PEM Fuel Cell MEA Fabrication per ASTM D7263, ISO 14687, and DOE Hydrogen Program Best Practices |
| Brand | dc-energies |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China-manufactured) |
| Model | Ref-Electrode Series |
| Pricing | Available Upon Request |
| Brand | DC-Energies |
|---|---|
| Model | DC |
| Type | Ultrasonic Spray Coating System for Catalyst Inks |
| XY Travel Range | 200 × 200 mm |
| Z-Axis Travel | 50 mm |
| Dispensing System | Programmable Flow Rate Control |
| Hotplate Dimensions | 220 × 220 mm |
| Heating Temperature | Up to 200 °C |
| Vacuum Substrate Hold-Down | Integrated |
| Power Supply | 220 VAC, 50 Hz, <800 W |
| Overall Dimensions | 630 × 600 × 630 mm (W×D×H) |
| Weight | <50 kg |
| Max Coating Area | 200 × 200 mm² |
| Compatible Processes | CCS, CCM, Thermal Transfer |
| Brand | DC-Energies |
|---|---|
| Model | DC-4 |
| Origin | Hubei, China |
| Construction Material Options | Graphite, Aerospace-Grade Titanium, Pt-Coated Titanium, Nickel Plate |
| Active Area Customization | 1–100 cm² (e.g., 1, 4, 5, 16, 25, 50, 100 cm²) |
| Flow Field Configurations | Single-, 3-, or 10-channel layouts |
| Flow Field Patterns | Serpentine, Parallel, or Rectangular (customizable) |
| Heating Integration | Cartridge Heater or Flexible Heated Foil (optional) |
| Interface Compatibility | Gas Inlet/Outlet Ports, Thermocouple Terminals (e.g., K-type), Current Collector Busbars (gold-plated copper or titanium) |
| Brand | DC-Energies |
|---|---|
| Origin | Hubei, China |
| Model | DSR Digital Rotating |
| Rotation Speed Range | 0–10,000 rpm |
| Motor Power | 20 W |
| Brush Type | Eco-friendly silver-carbon brush |
| Control Architecture | Integrated digital control chip with external signal input interface (compatible with potentiostats/galvanostats) |
| Power Supply | DC-powered, EMI-suppressed design |
| Explosion-Proof Rating | Certified for safe operation in inert-atmosphere gloveboxes |
| Rotating Shaft | 170 mm length, 15 mm OD, modular and glovebox-compatible |
| Disk Electrode | 5.0 mm active diameter, 15 mm total OD, glassy carbon active material, housing in PEEK or PTFE, operating temperature range: ambient to elevated |
| Ring-Disk Electrode | disk diameter 5.61 mm, ring inner diameter 6.25 mm, ring outer diameter 7.92 mm, inter-electrode gap ≤320 µm, dimensional tolerance ±0.01 mm, collection efficiency 37% |
| Cell Compatibility | Standard 5-port electrochemical cell or custom-designed cells |
| Gas Management | Dual mass flow controllers — inert gas (e.g., N₂/Ar) purge and O₂ saturation lines |
| Upgradability | U-CUP interchangeable disk holder enables in-situ electrode replacement and reaction product capture |
| Warranty & Support | 12-month limited warranty, lifetime technical maintenance, free application training and protocol development support |
| Brand | DC-Energies |
|---|---|
| Model | DSR Digital RDE/RRDE System |
| Origin | Hubei, China |
| Motor Power | 20 W |
| Speed Range | 0–10,000 rpm |
| Shaft Length | 170 mm |
| Shaft OD | 15 mm |
| Disk Electrode Diameter | 5.0 mm |
| Disk Electrode OD | 15 mm |
| Disk-Ring Gap | ≤320 µm |
| Disk-Ring Dimensional Tolerance | ±0.01 mm |
| Disk Diameter | 5.61 mm |
| Ring Inner Diameter | 6.25 mm |
| Ring Outer Diameter | 7.92 mm |
| Collection Efficiency | 37% |
| Electrode Housing Materials | PEEK or PTFE |
| Electrical Contact | Silver-carbon brush |
| Power Supply | DC |
| External Speed Control Interface | Yes |
| Explosion-Proof Design | Yes |
| Gas Flow Control | Dual mass flow meters (inert gas + O₂) |
| Warranty | 1 year standard, lifetime technical support |
| Brand | DC-Energies |
|---|---|
| Model | DSR Digital |
| Type | Integrated RDE/RRDE Rotator with Digital Speed Control |
| Motor Power | 20 W |
| Speed Range | 0–10,000 rpm |
| Rotation Shaft | 170 mm length, 15 mm OD |
| Disk Electrode | 5.0 mm active diameter, threaded GC tip, PTFE or PEEK insulating sheath |
| RRDE Geometry | Disk Ø = 5.61 mm, Ring ID = 6.25 mm, Ring OD = 7.92 mm, Gap ≤ 320 µm, Collection Efficiency = 37% |
| Precision | ±0.01 mm geometric tolerance |
| Electrical Interface | External analog/digital speed control input (0–5 V or 4–20 mA), silver-carbon brush contact |
| Power Supply | DC input (isolated), EMI-suppressed |
| Safety | Intrinsically safe design compliant with IEC 60079-0 for glovebox-compatible operation |
| Gas Management | Dual mass flow controllers (inert gas purge + O₂ saturation) |
| Compliance | Designed for ASTM G59, G102, ISO 17475, and USP <798> electrochemical validation workflows |
| Brand | DC-Energies |
|---|---|
| Origin | Hubei, China |
| Model | DSR Digital RDE System |
| Rotation Speed Range | 0–10000 rpm |
| Motor Power | 20 W |
| Contact Material | Eco-friendly Ag–C brush |
| Control Architecture | Integrated digital control chip, DC-powered, EMI-resistant |
| Rotating Shaft | 170 mm length, 15 mm OD |
| Disk Electrode | Glassy carbon, 5.0 mm disk diameter, 15 mm outer diameter, PTFE or PEEK insulation |
| Ring-Disk Electrode (RDE/RRDE) | Disk diameter 5.61 mm, ring inner diameter 6.25 mm, ring outer diameter 7.92 mm, inter-electrode gap ≤320 µm, collection efficiency 37%, dimensional tolerance ±0.01 mm |
| Gas Flow Control | Dual calibrated mass flow meters (inert gas + O₂) |
| Compliance | Designed for glovebox integration, explosion-proof enclosure, modular U-CUP adapter for product capture and electrode exchange |
| Warranty | 12-month limited warranty, lifetime technical support and application assistance |
| Brand | DC-Energies |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Model | DSR Digital RDE System |
| Speed Range | 0–10,000 rpm |
| Motor Power | 20 W |
| Carbon Brush | Silver-carbon (Ag > 80%), low contact resistance, high EMI immunity |
| Rotation Shaft | 170 mm length, 15 mm OD |
| Disk Electrode | Glassy carbon, 5.0 mm disk diameter, 15 mm outer diameter, PTFE or PEEK insulation |
| Ring-Disk Electrode (RDE/RRDE) | Disk diameter 5.61 mm, ring inner diameter 6.25 mm, ring outer diameter 7.92 mm, gap ≤ 320 µm, collection efficiency 37%, dimensional tolerance ±0.01 mm |
| Gas Flow Control | Dual calibrated mass flow meters (inert gas & O₂) |
| Power Supply | DC input, EMI-reduced architecture |
| Compliance | Designed for glovebox integration, explosion-proof enclosure |
| Warranty | 12 months, lifetime technical support |
| Brand | DC-Energies |
|---|---|
| Model | DSR Digital RRDE |
| Origin | Hubei, China |
| Motor Power | 20 W |
| Max Rotational Speed | 0–10,000 rpm |
| Rotation Shaft Length | 170 mm |
| Shaft Outer Diameter | 15 mm |
| Disk Electrode Material | Glassy Carbon |
| Disk Diameter | 5.0 mm |
| Ring-Disk Gap | ≤320 µm |
| Disk-Ring Dimensional Tolerance | ±0.01 mm |
| Disk Diameter (RRDE) | 5.61 mm |
| Ring Inner Diameter | 6.25 mm |
| Ring Outer Diameter | 7.92 mm |
| Collection Efficiency | 37% |
| Electrode Housing Materials | PEEK or PTFE |
| Electrical Contact | Silver-impregnated carbon brush with low contact resistance and EMI shielding |
| Control Interface | Analog voltage input (0–5 V or 0–10 V) for external speed synchronization with potentiostats |
| Power Supply | DC input (reduces mains-borne noise) |
| Brand | DC-Energies |
|---|---|
| Model | DSR Digital |
| Type | Rotating Ring-Disk Electrode (RRDE) Instrument |
| Rotation Speed Range | 0–10,000 rpm |
| Motor Power | 20 W |
| Ring-Disk Gap | ≤320 µm |
| Disk Diameter | 5.61 mm |
| Ring Inner/Outer Diameter | 6.25 mm / 7.92 mm |
| Collection Efficiency | 37% |
| Disk Electrode Material | Glassy Carbon |
| Insulator Body Materials | PEEK or PTFE |
| Disk Electrode Diameter (active) | 5.0 mm |
| Shaft Length | 170 mm |
| Shaft Outer Diameter | 15 mm |
| Electrical Contact | Silver-Carbon Brush |
| Power Supply | DC |
| Control | Integrated Digital Microcontroller |
| External Trigger Input | Yes |
| Explosion-Proof Design | Yes |
| Compatible Electrolytic Cells | Standard 5-Port or Custom-Built |
| Brand | dc-energies |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | DSR Rotating Disk Electrode (Fast-Response) |
| Electrode Materials | Glassy Carbon (GC), Gold (Au), Platinum (Pt) |
| Max Rotational Speed | 0–7000 rpm |
| Disk Diameter | 5 mm |
| Overall Electrode Outer Diameter | 12 mm |
| Operating Temperature Range | 10–25 °C |
| Electrode Construction | Monolithic (non-detachable shaft-electrode assembly) |
| Instrument Type | Electrochemical Working Electrode Accessory |
| Brand | DC-energies |
|---|---|
| Origin | Hubei, China |
| Model | DSR-M Digital |
| Rotation Speed Range | 0–10,000 rpm |
| Motor Power | 20 W |
| Speed Resolution | 1 mV per 1 rpm (factory-calibrated, <1% error) |
| Disk Electrode | Glassy Carbon, 5.0 mm diameter, 15 mm outer diameter |
| Ring Electrode | Platinum, ring ID = 6.25 mm, OD = 7.92 mm, disk-ring gap ≤ 320 µm, collection efficiency = 37% |
| Rotating Shaft | 170 mm length, 15 mm OD, internal thread |
| Housing Material | Chemical-resistant polypropylene |
| Interface | Analog voltage input/output (0–10 V), TTL-compatible speed control signal |
| Compliance | Designed for inert-atmosphere glovebox integration (O₂/H₂O < 0.1 ppm), explosion-proof enclosure per IEC 60079-0 general requirements |
| Brand | dc-energies |
|---|---|
| Model | DSR-M |
| Type | Rotating Disk Electrode (RDE) and Rotating Ring-Disk Electrode (RRDE) Apparatus |
| Rotation Speed Range | 0–10,850 rpm |
| Motor Power | 20 W |
| Speed Control | Analog voltage input (0–10 V), LED digital display with manual knob adjustment |
| Contact Method | Silver-plated carbon brushes |
| Disk Electrode Material | Glassy carbon |
| Ring Electrode Material | Platinum |
| Disk Diameter | 5.61 mm |
| Ring Inner Diameter | 6.25 mm |
| Ring Outer Diameter | 7.92 mm |
| Gap Between Disk and Ring | ≤320 µm |
| Collection Efficiency | 37% |
| Rotating Shaft Length | 170 mm |
| Shaft Outer Diameter | 15 mm |
| Housing Material | Chemical-resistant polypropylene |
| Compliance | Designed for inert-atmosphere operation (glovebox-compatible), explosion-proof enclosure per IEC 60079-0 general requirements |
| Brand | DC-ENERGIES |
|---|---|
| Model | DSR-M |
| Electrode Type | Dual-mode RDE/RRDE |
| Disk Material | Glassy Carbon |
| Ring Material | Platinum |
| Disk Diameter | 5.61 mm |
| Ring Inner Diameter | 6.25 mm |
| Ring Outer Diameter | 7.92 mm |
| Ring-Disk Gap | ≤320 µm |
| Collection Efficiency | 37% |
| Rotation Speed Range | 0–10,000 rpm |
| Speed Control Resolution | 1 mV per RPM (default), accuracy < ±1% |
| Motor Power | 20 W |
| Shaft Length | 170 mm |
| Shaft OD | 15 mm |
| Housing Material | Chemical-resistant Polypropylene |
| Interface | Analog voltage input/output (0–10 V), TTL-compatible trigger output |
| Mounting | Modular, glovebox-compatible, detachable shaft and controller |
| Operating Temperature | Ambient (20–25 °C) |
| Compliance | Designed for GLP-compliant electrochemical laboratories |
| Brand | DC-Energies |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Model | DSR-M |
| Rotation Speed Range | 0–10,000 rpm |
| Motor Power | 20 W |
| Disk Electrode Material | Glassy Carbon |
| Ring Electrode Material | Platinum |
| Disk Diameter | 5.61 mm |
| Ring Inner Diameter | 6.25 mm |
| Ring Outer Diameter | 7.92 mm |
| Ring-Disk Gap | ≤320 µm |
| Collection Efficiency | 37% |
| Disk-Ring Dimensional Tolerance | ±0.01 mm |
| Electrode Housing Material | PTFE |
| Rotating Shaft Length | 170 mm |
| Shaft Outer Diameter | 15 mm |
| Base Material | Polypropylene |
| Signal Interface | Analog voltage input/output (0–10 V), TTL-compatible speed control |
| Compliance | Designed for inert-atmosphere operation (glovebox-compatible), explosion-resistant enclosure |
| Brand | DC-Energies |
|---|---|
| Model | DSR-M |
| Origin | Hubei, China |
| Rotation Speed Range | 0–10,000 rpm |
| Motor Power | 20 W |
| Disk Electrode Material | Glassy Carbon |
| Ring Electrode Material | Platinum |
| Disk Diameter | 5.61 mm |
| Ring Inner/Outer Diameter | 6.25 mm / 7.92 mm |
| Ring-Disk Gap | ≤320 µm |
| Collection Efficiency | 37% |
| Shaft Length | 170 mm |
| Shaft Outer Diameter | 15 mm |
| Housing Material | Chemical-Resistant Polypropylene |
| Interface | Analog Voltage Input/Output (0–10 V), TTL-compatible speed control signal |
| Compliance | Designed for glovebox integration, explosion-resistant mechanical architecture |
| Temperature Range | Ambient |
| Brand | DC-ENERGIES |
|---|---|
| Model | DSR-M |
| Origin | Hubei, China |
| Motor Power | 20 W |
| Speed Range | 0–10,000 rpm |
| Speed Accuracy | <1% error (default calibration: 1 mV per 1 rpm) |
| Contact Mechanism | Silver-plated carbon brushes |
| Rotating Shaft Length | 170 mm |
| Shaft Outer Diameter | 15 mm |
| Disk Electrode | Glassy Carbon (5.0 mm diameter), PTFE housing |
| RRDE Geometry | GC disk (5.61 mm), Pt ring (ID 6.25 mm, OD 7.92 mm), gap ≤320 µm, collection efficiency 37% |
| Dimensional Tolerance | ±0.01 mm |
| Control Interface | Analog voltage input/output (0–10 V), compatible with potentiostats and oscilloscopes |
| Enclosure Material | Chemical-resistant polypropylene |
| Explosion-Proof Design | Yes |
| Modular & Glovebox-Compatible Architecture | Yes |
| Replaceable Disk Assembly | U-CUP style for in-situ electrode exchange |
| Brand | dc-energies |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Model | DSR-M (RRDE) |
| Rotation Speed Range | 0–10,000 rpm |
| Motor Power | 20 W |
| Disk Electrode Material | Glassy Carbon |
| Ring Electrode Material | Platinum |
| Disk Diameter | 5.61 mm |
| Ring Inner Diameter | 6.25 mm |
| Ring Outer Diameter | 7.92 mm |
| Disk-Ring Gap | ≤320 µm |
| Collection Efficiency | 37% |
| Disk-Ring Dimensional Tolerance | ±0.01 mm |
| Electrode Body Material | PTFE-coated |
| Rotating Shaft Length | 170 mm |
| Shaft Outer Diameter | 15 mm |
| Control Interface | Analog voltage input/output (0–10 V), TTL-compatible |
| Operating Temperature | Ambient |
| Compliance | Designed for inert-atmosphere glovebox integration |
| Brand | dc-energies |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | Interchangeable-Disk RDE |
| Instrument Category | Electrochemical Electrode |
| Disk Material | Glassy Carbon (GC), Gold (Au), Platinum (Pt) |
| Operating Temperature Range | 10–25 °C |
| Disk Diameter | 5 mm |
| Shaft Material | PTFE-insulated Stainless Steel |
| Rotation Speed Compatibility | Compatible with Standard RDE Controllers (e.g., Pine Research, BASi, CHI) |
| Sealing Mechanism | U-Cup Compression Seal |
| Brand | dc-energies |
|---|---|
| Material Options | Glassy Carbon (GC), Gold (Au), Platinum (Pt) |
| Operating Temperature Range | Up to 80 °C |
| Disk Electrode Diameter | 5.0 mm |
| Overall Electrode Outer Diameter | 15 mm |
| Housing Material | PEEK (Polyether Ether Ketone) |
| Electrical Contact | Precision External Thread Interface |
| Compliance | Designed for ASTM G102, ISO 17475, and electrochemical kinetic studies under controlled hydrodynamic conditions |
| Brand | dc-energies |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Instrument Category | Domestic |
| Model | E5GC |
| Electrode Material | Glassy Carbon (GC), Optional Au/Pt variants |
| Disk Diameter | 5.0 mm |
| Overall Outer Diameter | 15 mm |
| Operating Temperature Range | 10–25 °C |
| Housing Material | PTFE (Polytetrafluoroethylene) |
| Mounting Interface | External Threaded Stem |
| Compatibility | DSR Series Rotating Disk/Ring-Disk Electrode Holders |
| Instrument Type | Electrochemical Working Electrode Accessory |
| Brand | dc-energies |
|---|---|
| Material Options | Glassy Carbon (GC), Gold (Au), Platinum (Pt) |
| Operating Temperature Range | 10–25 °C |
| Disk Electrode Diameter | 5.0 mm |
| Overall Electrode Outer Diameter | 15 mm |
| Housing Material | PTFE (Polytetrafluoroethylene) |
| Electrical Interface | External Threaded Contact |
| Compliance | Designed for ASTM G102, ISO 17475, and electrochemical standard cell configurations |
| Brand | dc-energies |
|---|---|
| Disk Material Options | Glassy Carbon, Platinum, Gold |
| Ring Material Options | Glassy Carbon, Platinum, Gold |
| Disk Diameter (GC) | 4.57 mm |
| Ring Inner Diameter | 4.93 mm |
| Ring Outer Diameter | 5.38 mm |
| Inter-electrode Gap | 118 µm |
| Collection Efficiency | 22% |
| Disk Geometric Area | 0.1639 cm² |
| Ring Geometric Area | 0.0364 cm² |
| Operating Temperature Range | 10–25 °C |
| Instrument Type | Electrochemical Working Electrode Assembly |
| Origin | Hubei, China |
| Brand | dc-energies |
|---|---|
| Origin | Hubei, China |
| Model | RRDE-318 |
| Ring-Disk Gap | 318 µm |
| Collection Efficiency | 37% |
| Operating Temperature Range | 10–25 °C |
| Disk Electrode Area | 0.2475 cm² |
| Ring Electrode Area | 0.1866 cm² |
| Glassy Carbon Disk Outer Diameter | 5.61 mm |
| Platinum Ring Outer Diameter | 7.92 mm |
| Platinum Ring Inner Diameter | 6.25 mm |
| Disk Material Options | Glassy carbon, platinum, gold |
| Ring Material Options | Glassy carbon, platinum, gold |
| Mechanical Interface | External threaded shaft for stable electrical contact |
| Brand | dc-energies |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Regional Classification | Domestic (China) |
| Model | RRDE-318 |
| Ring-Disk Gap | 318 µm |
| Collection Efficiency | 37% |
| Operating Temperature Range | 10–25 °C |
| Disk Geometric Area | 0.2475 cm² |
| Ring Geometric Area | 0.1866 cm² |
| Glassy Carbon Disk Outer Diameter | 5.61 mm |
| Platinum Ring Outer Diameter | 7.92 mm |
| Platinum Ring Inner Diameter | 6.25 mm |
| Disk Material Options | Glassy carbon, platinum, gold |
| Ring Material Options | Glassy carbon, platinum, gold |
| Mechanical Interface | Precision external-threaded shaft for low-contact-resistance mounting |