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Precision Knurled Brass Thumb Nuts Hex-Style External Knurl
Custom
Decorative brass dome nuts for a polished finish on furniture, marine hardware, and automotive trim. Corrosion-resistant, aesthetic, and easy to install. Request a quote.
minimum order
1 piece
Quantity
$0.03 - $0.05
/ piece
Decorative brass dome nuts for a polished finish on furniture, marine hardware, and automotive trim. Corrosion-resistant, aesthetic, and easy to install. Request a quote.
| Key Attributes | |
| Machining Capabilities | CNC Machining Processes:Broaching, Drilling, Etching/Chemical Machining, Laser Machining, Milling, Turning, Wire EDM, Rapid Prototyping |
| Materials Supported | Aluminum, Brass, Bronze, Copper, Hardened Metals, Stainless Steel, Steel Alloys, Plastic |
| Micro-Machining or Not | Micro Machining |
| Key Processes | CNC Milling, Turning, Drilling |
| Tolerance Standards | Industry-standard precision |
| Surface Treatments | Anodizing, Plasting, Polishing, etc. |
| Applications | Control Systems, Automotive Components |
| Place of Origin | Guangdong, China |
| Model Number | CUSTOM |
| Service Type | Customized OEM/ODM Manufacturing |
| Drawing Formats | PDF, CAD, IGES, STEP |
| Delivery Time | 7-30 Days |
| MOQ | 10 pcs |
· Product Overview
Introducing the YITECH Precision Knurled Brass Thumb Nuts (Hex-Style External Knurl) — compact, ergonomic fasteners designed for tool-free adjustment, secure hand-tightening, and reliable retention in mechanical assemblies. These golden-hued brass nuts feature a distinctive diamond-pattern knurled exterior for superior grip, a smooth internal thread, and a robust cylindrical body—ideal for applications where frequent manual adjustment, vibration resistance, and aesthetic finish matter.
Crafted from high-purity C3604 free-cutting brass, these thumb nuts combine excellent machinability, corrosion resistance, and electrical conductivity. The polished surface and precise knurling ensure both functional performance and premium visual appeal—perfect for consumer-facing equipment, lab instruments, DIY kits, and industrial control panels.
Unlike standard hex nuts, these are engineered for human interaction: easy to tighten/loosen by hand, even with gloves, and resistant to slipping under torque or vibration.
· Core Specifications
| Feature | Specification |
|---|---|
| Material | C3604 Brass (Lead-free compliant, RoHS certified) |
| Surface Finish | Polished Gold (natural brass luster); optional black oxide or nickel plating |
| Outer Diameter | Ø6mm – Ø16mm (standard: Ø8mm, Ø10mm, Ø12mm) |
| Height / Length | 5mm – 12mm (e.g., Ø10×8mm common) |
| Internal Thread | M3, M4, M5, M6 (metric), or custom (UNC/UNF available) |
| Knurl Pattern | Diamond cross-knurl (±0.15mm depth), 360° continuous grip |
| Tolerance | ±0.02mm (OD/ID), ±0.05mm (length), thread pitch ±0.01mm |
| Processing Method | CNC Turning + Knurling (mechanical rolling) + Deburring + Polishing |
| Hardness | HB 80–100 (optimal for hand-tightening without deformation) |
| Weight | 1.5g – 8g per piece (lightweight yet durable) |
| Operating Temp. | -40°C to +120°C |
· Application Scenarios
These precision brass thumb nuts are widely used in applications requiring frequent manual adjustment, secure fastening without tools, and refined aesthetics:
- Consumer Electronics & Audio Gear: Volume knobs, panel fasteners, headphone jack retainers
- Laboratory & Medical Equipment: Adjuster knobs on microscopes, pipette holders, sensor mounts
- 3D Printers & CNC Machines: Bed leveling screws, extruder tension adjusters, filament guide clamps
- Robotics & Drones: Servo horn fasteners, camera gimbal locks, battery compartment covers
- DIY & Maker Projects: Enclosure panels, modular chassis, educational kits, RC models
Key advantages:
- ✋ Tool-free operation — tighten/loosen with fingers or gloved hands
- 🔒 Vibration-resistant — knurling + brass elasticity prevents loosening
- 🌟 Premium appearance — complements aluminum, stainless, or plastic housings
- ⚡ Electrically conductive — suitable for grounding or EMI-sensitive assemblies
- ♻️ Recyclable & non-magnetic — ideal for sensitive environments
· Production Process Introduction
· Packaging and Shipping Methods
- Inner Packaging: 10–50 pcs per resealable anti-tarnish bag (prevents oxidation during storage).
- Bulk Packaging: 500–2,000 pcs per cardboard box with foam dividers (customizable).
- Shipping Options:
- 📦 Express: DHL/FedEx/UPS (3–7 days)
- ✈️ Air Freight: 5–10 days (for orders >5,000 pcs)
- 🚢 Sea Freight: 20–35 days (cost-effective for large volumes)
- White-Label Service: Custom logo engraving, branded inserts, retail blister packs available.
· Frequently Asked Questions (FAQ)
Q1: What is the MOQ?
A: Standard MOQ = 100 pieces for stock sizes (e.g., M4×Ø10×8mm). For custom thread/size/knurl pattern, MOQ = 500 pieces. Sample orders: 5–10 pcs at cost + shipping.
A: Standard MOQ = 100 pieces for stock sizes (e.g., M4×Ø10×8mm). For custom thread/size/knurl pattern, MOQ = 500 pieces. Sample orders: 5–10 pcs at cost + shipping.
Q2: What’s the lead time?
A:
A:
- Stock items: 2–4 working days after payment
- Custom designs: 7–10 working days (includes CAD review & tooling)
- Rush service (≤3 days): Available for +25% fee (subject to capacity)
Q3: Can I customize the knurl pattern, size, or thread?
A: Yes! We offer full customization:
A: Yes! We offer full customization:
- Knurl type: Diamond, straight, or custom geometric patterns
- OD/height: From Ø5mm × 4mm up to Ø20mm × 15mm
- Thread: M2–M10, UNC/UNF, or metric fine pitch
- Material: Brass (C3604/C2600), aluminum, stainless steel
- Finish: Polished, black anodized, nickel-plated, or PVD-coated
Just send your sketch or requirements—we’ll provide a 3D model and quote within 2 hours.
Q4: Do you offer samples?
A: Yes. Free samples (5 pcs) for standard models. Custom samples: $10–$25 (refundable against first bulk order).
A: Yes. Free samples (5 pcs) for standard models. Custom samples: $10–$25 (refundable against first bulk order).
Q5: Are these RoHS/REACH compliant?
A: Yes. All brass materials are certified lead-free (<0.1% Pb) and comply with EU RoHS 3 (2015/863/EU) and REACH SVHC regulations. Test reports available upon request.
A: Yes. All brass materials are certified lead-free (<0.1% Pb) and comply with EU RoHS 3 (2015/863/EU) and REACH SVHC regulations. Test reports available upon request.
Q6: Can I get them with logo engraving?
A: Absolutely. Laser engraving (≤3mm² area) or micro-stamping available for branding—minimum 500 pcs.
A: Absolutely. Laser engraving (≤3mm² area) or micro-stamping available for branding—minimum 500 pcs.
Why Choose YITECH?
✅ True Precision Engineering — Not stamped parts; fully CNC-machined for consistency
✅ Superior Grip & Durability — Mechanical knurling lasts 10× longer than laser-etched
✅ Design Flexibility — From hobbyist kits to OEM-grade hardware
✅ Fast Turnaround — One of the shortest lead times in the industry
✅ Trusted Globally — Used by 300+ brands in 40+ countries for mission-critical assemblies
✅ Superior Grip & Durability — Mechanical knurling lasts 10× longer than laser-etched
✅ Design Flexibility — From hobbyist kits to OEM-grade hardware
✅ Fast Turnaround — One of the shortest lead times in the industry
✅ Trusted Globally — Used by 300+ brands in 40+ countries for mission-critical assemblies
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