Product Parameters
| Item | Specification |
|---|---|
| Material | Carbon Steel, Stainless Steel |
| Thread | Metric (M3–M20), Imperial (#4–3/4") |
| Surface | Electrophoretic Coating (E-Coat) |
| Color | Black (standard), custom colors |
| Film Thickness | 15–25 μm |
| Application | Automotive, industrial equipment, electrical |
| MOQ | 50 pcs |
description
E-coated thumb screws have an electrophoretic coating applied by dipping the parts in a paint bath with an applied electrical field - the field causes paint particles to deposit uniformly across all surfaces, including inside holes and recesses that spray coating cannot reach. The result is complete, uniform coverage with consistent thickness on every part. The e-coat thickness is typically 15 to 25 micrometers - thinner than powder coating but more uniformly applied. Black is the standard color. The e-coat can be applied over zinc-plated parts for enhanced corrosion resistance, or directly over prepared steel.
Why E-Coat Rather Than Powder Coat
E-coating coats inside bores and threaded holes - powder coating, applied by spray, cannot get inside a small bore. For fasteners with internal threads, e-coating is the only practical way to get complete coverage in one coat. E-coat also has better edge coverage than spray-applied coatings.
FAQ
Q1: MOQ?
A1: 50 pieces for standard thumb screws.
Q2: Surface finish?
A2: Electrophoretic coating - uniform coverage including inside holes and recesses.
Q3: Film thickness?
A3: 15–25 μm typical - thin but consistent and well-adhered.
Q4: Color options?
A4: Black standard. Custom colors available for volume orders.
Q5: Applications?
A5: Automotive, industrial equipment, electrical enclosures - high-volume applications.
Q6: Corrosion resistance?
A6: Good for automotive and industrial environments. Can be applied over zinc for enhanced protection.
Quality is non-negotiable in precision manufacturing. Every component undergoes rigorous inspection at each stage of production.
- IATF 16949 - Automotive quality management system for safety-critical components
- PPAP / PPF - Production Part Approval Process documentation available on request
- AIAG Core Tools - APQP, FMEA, SPC, and MSA documentation on demand
- Passivation / Electropolishing - ASTM A967 procedures for corrosion resistance
- Material Traceability - Heat number tracking from raw material to finished part
From raw material to finished product, every step is controlled and documented:
- Material Preparation - CNC turning/milling to near-net shape
- Heat Treatment - Through-hardening or case-hardening for strength-critical parts
- Surface Preparation - Degreasing, acid cleaning, and surface activation
- Electroplating - Controlled bath process with thickness monitoring
- Sealing / Baking - Chrome sealing, anodize sealing, or hydrogen embrittlement relief baking
- Inspection - Coating thickness measurement, adhesion testing, and visual check
- Packaging - Protective interleaving, VCI packaging, and anti-tarnish wrapping
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