Custom Nut Manufacturer for Automotive & OEM
From cold heading to precision CNC machining, we deliver automotive-grade, PPAP-compliant fasteners directly to your assembly lines. Experience 100% DDP Shipping (Duty Paid) to the US, Mexico & Germany—no hidden tariffs, no customs delays.
✔️ <50 PPM Target
📄 PPAP Level 3
🚢 100% DDP Door-to-Door
Custom & Turned
Made-to-print special nuts
& bushings from your
drawings.
Weld Nuts Expertise
Projection, hex, and square
custom weld nuts designed
for automated welding lines
Global Supply Chain
Direct DDP shipping to
automotive hubs in Detroit,
Monterrey and Bavaria.
Browse special nuts by function and design.
We specialize in custom weld nut fabrication and non-standard fasteners that go beyond the catalog. Whether you need specialized automotive custom fasteners, ring projection weld nuts, or complex turned parts, we provide the metallurgical expertise your assembly requires. Materials include Carbon Steel, Stainless Steel, Brass, and Aluminum. Available for wholesale weld nuts supply to Tier 1/Tier 2 facilities. Fully compliant with DIN, GM, and JIS standard weld nuts specifications for all metric weld nuts wholesale orders.
Custom Weld Nuts & Spacers
Designed for automated bowl feeding and robotic welding cells. As a direct weld nut manufacturer, we produce precise geometries with sharp projection tips for focused current density and superior push-out strength.
- DIN 929 Hex & DIN 928 Square Weld Nuts
- Ring Projection Weld Nuts (GM Standard Fasteners)
- D-Shape & Off-Center Hole Weld Nuts
- Metric & Imperial Weld Bushings (Available in Bulk)
T-Nuts & Threaded Inserts
Engineered as high-strength anchor points for wood, plastic, and composite materials. Featuring slab-base designs for stability and knurled bodies for anti-rotation torque resistance.
- Slab Base T-Nuts (Stamped/Cold Formed)
- Pronged Tee Nuts
- Knurled Threaded Inserts
- Blind Rivet Nuts / Clinch Nuts
Cap Nuts & Security Fasteners
Functional protection and tamper resistance. We produce high-profile cap nuts for exposed threads and specialized security nuts with Torx or Star drives to prevent unauthorized removal.
- High-Profile Cap Nuts / Acorn Nuts
- Torx / Star Drive Security Nuts
- Flange Cap Nuts
- Anti-Theft Shear Nuts
Precision Turned Parts & Bushings
Precision machined for geometries that require tight tolerances or features impossible to cold form. Includes long blind hole bushings, slotted cylindrical nuts (cross dowels), and custom pivot pins.
- Long Blind Hole Bushings
- Slotted Cylindrical Nuts / Cross Dowels
- Custom Collars & Spacers
- Fine Pitch & Left-Hand Thread Nuts
Zero-Defect Quality Control & Full Traceability
Our production system is built for strict OEM reliability. From raw wire rod to finished automotive fasteners, we implement rigorous metallurgical testing and automated inspection to guarantee your assembly line runs without interruption.
Raw Material Verification: We utilize in-house Spectrometers to verify chemical composition before production, ensuring material grades (like SCM435, 10B21, or Stainless 316) strictly meet your specifications.
Mechanical & Thread Testing: Every batch undergoes strict Proof Load and torque testing. We utilize precise Go/No-Go thread gauging to guarantee perfect mating and thread integrity for automated assembly.
100% Optical Sorting: We employ high-speed automated camera and laser sorting systems to verify dimensional accuracy, achieving our strict <50 PPM target before packaging.
PPAP Level 3 Traceability: Every box is shipped with a unique Lot Number and export-grade VCI anti-corrosion packaging. We provide complete PPAP documentation and IMDS support for full supply chain transparency.
Heat Treatment & Anti-Corrosion Finishes
Custom nuts often require specific friction coefficients for automated assembly and high corrosion resistance for outdoor use. We offer a full range of in-house and partner finishing services.
Heat Treatment: Quenching & Tempering (to Property Class 8.8, 10.9, 12.9), Carburizing, and Annealing.
Plating & Coating:
Zinc Flake (Geomet/Dacromet): High corrosion resistance (1000h+ SST) free from hydrogen embrittlement.
Zinc Plating: Trivalent Clear/Yellow/Black Zinc (RoHS Compliant).
Passivation: For Stainless Steel parts.
Friction Control: Waxing or top-coat sealers to stabilize torque-tension relationships (Target K-Factor control) and prevent galling.
Testing, Inspection & Proof Load
Engineered to meet strict Automotive OEM standards, quality is embedded in our process. We utilize advanced metrology to ensure your special nuts perform under extreme stress.
Key Capabilities:
✔ Proof Load Testing: Verifying the nut’s ability to hold load without stripping.
✔ Optical Sorting: Automated visual inspection machines to screen for thread presence, dimensions, and mix-ups (<50 PPM or Zero-Defect targets).
✔ Thread Gauging: Go/No-Go testing to verify thread fit (6H/6g or custom).
✔ Hardness Testing: Verification of core and surface hardness (HRC/HV).
✔ Concentricity & Runout: Precision measurement to ensure perfect alignment for automated robotic welding.
Cold Heading & Custom Tooling
We offer VA/VE (Value Engineering) solutions to optimize costs by converting expensive machined parts into high-strength Cold Headed parts whenever possible.
Cold Forming: Our multi-station headers allow us to form complex shapes—like flanges, knurls, and non-round bodies—at high speed with minimal material waste (M4 to M24 capability). This process also improves the grain flow of the metal, increasing part strength.
Secondary Operations: For features that cannot be cold formed, we seamlessly integrate precision CNC turning, drilling, tapping, and slotting.
Prototyping: We support your R&D phase with rapid prototyping (rapid machined samples shipped in 3-5 days) before you commit to mass production tooling.
Application Engineering
Materials & Grades for Demanding Environments
We manufacture strictly to your material specifications.
Carbon & Alloy Steel: Low Carbon (1010, 1018) to High Tensile Alloys (35CrMo, 42CrMo). Grades 4, 6, 8, 10, 12.
Stainless Steel: 304 (A2) and 316 (A4) for superior corrosion resistance.
Brass: For electrical applications and decorative finishes.
Aluminum: Lightweight options for aerospace and automotive weight reduction.
Custom Special Nuts Catalog
Explore our curated catalog of engineered fastening solutions. Featuring high-precision Weld Nuts, Lock Nuts, and Security Fasteners, with custom manufacturing available for your specific needs.
Engineer’s Toolbox
Technical specifications for weld projections, material grades, and plating standards.
| Design Type | Application Benefit |
|---|---|
| Ring Projection | Provides a 360° leak-proof seal ideal for Fuel/Oil tanks. |
| 3 / 4 Dimples | Standard configuration for DIN 929 & Square nuts. |
| Elongated | Designed for narrow flanges to provide anti-rotation. |
| Material | Grade | Typical Usage |
|---|---|---|
| Carbon Steel | 1008 / 1010 | Standard Weld Nuts (Excellent Formability). |
| Alloy Steel | 35CrMo | Class 10/12 High Strength applications. |
| Stainless | 304 / 316 | Corrosion Resistance & Food Grade. |
| Finish / Plating | SST (Red Rust) | Key Feature |
|---|---|---|
| Zinc Plating (Cr3) | 48 - 96 Hours | Standard economic protection. |
| Zinc Flake (Geomet) | 500 - 1000 Hours | No Hydrogen Embrittlement risk. |
| Zinc Nickel | 720+ Hours | Automotive High-Temp & Extreme protection. |
Automotive & OEM Success Stories
Real-world examples of how we translate customer pain points into engineered fastening solutions, ensuring zero-defect assembly and streamlined global supply chains.
Resolving Weld Spatter in Automated Robotic Lines
VA/VE Cost Reduction & Direct DDP Supply to Texas
Material & Grade Options
We offer a wide range of raw materials certified to ASTM, DIN, and ISO standards. Material certificates (EN 10204 3.1) are available upon request for all production lots.
Carbon & Alloy Steel
The foundation of our automotive fasteners. Excellent formability for cold heading weld nuts and capable of reaching Property Class 8, 10, and 12 after in-house heat treatment.
Stainless Steel
Superior corrosion resistance without the need for plating. We specialize in cold-forming 300-series stainless for harsh environments and food-grade applications.
Brass Alloys
Exceptional electrical conductivity and machinability. The industry standard for injection molding threaded inserts, knurled nuts, and electrical terminals.
Lightweight Alloys
High strength-to-weight ratios for critical weight reduction. Typically utilized in our precision CNC turning department for custom bushings and specialized nuts.
Request a Quote (Attach Drawing)
Fill out the details below for an accurate Landed Cost Quote or to request our bulk weld nuts price list. Attaching CAD/Drawings will expedite our VA/VE engineering review.
Technical FAQ: Special Nuts & Custom Parts
Can you manufacture custom special nuts based on drawings?
Yes. Over 60% of our production is dedicated to non-standard items. We can manufacture special nuts, bushings, and turned parts based on your PDF/CAD drawings. We handle complex geometries including oblong, D-shape, and specific projection designs for welding.
How do I choose between Ring Projection and Dimple welding points?
Ring Projections provide a continuous 360° seal, making them ideal for oil/fuel tanks to prevent leakage. Dimple Projections (3 or 4 points) are better for general structural assembly (DIN 929 type) where sealing is not the primary concern but high torque resistance is required.
When should I use All-Metal Lock Nuts vs. Nylon Insert Nuts?
Use Nylon Insert Nuts (DIN 985) for standard vibration resistance up to 120°C. For high-temperature environments (exhaust systems, engines) or chemical exposure, All-Metal Lock Nuts (Stover/Deformed Thread) are required to maintain locking torque without melting.
What plating options do you offer for high corrosion resistance?
Beyond standard Zinc Plating, we offer Zinc Nickel (720h+ SST) and Zinc Flake (Geomet/Dacromet, 1000h+ SST). Zinc Flake is highly recommended for Grade 10/12 high-strength nuts to eliminate the risk of hydrogen embrittlement.
What is the MOQ for custom turned parts?
For custom turned parts or special cold-forged nuts, our typical MOQ is 10,000 to 50,000 pieces depending on the complexity and tooling requirements. We can provide prototype samples for validation before mass production.
Beyond Manufacturing: The 100% DDP Advantage
Stop worrying about customs, hidden tariffs, and freight forwarders. Our Direct-to-Line DDP service lets you focus on assembly, while we handle the rest.
The Old Way (Standard FOB)
- ✖ You manage unpredictable sea freight and local local forwarders.
- ✖ Subject to surprise import duties (e.g., Section 301) and customs holds.
- ✖ Hidden logistics costs continually inflate your true per-part price.
- ✖ Risk of supply chain disruptions stopping your automated assembly lines.
Our Direct DDP Solution
- ✔ As your direct from factory partner, we handle 100% of global logistics. Experience the cost benefits of an offshore weld nut manufacturer without the customs hassle.
- ✔ Zero Customs Hassle:All tariffs, duties, and import taxes are pre-paid by us.
- ✔ Transparent Landed Cost: The quote you see is the final delivered price.
- ✔ Direct-to-Line Supply: Proven, stable delivery routes to Detroit, Monterrey, and Bavaria.