Product Parameters
| Item | Specification |
|---|---|
| Material | Carbon Steel, Stainless Steel |
| Thread | Metric (M3–M20), Imperial (#4–3/4") |
| Surface | Zinc Plated (Clear, Yellow, Black) |
| Head Style | Knurled, Flat, Wing |
| MOQ | 50 pcs |
description
Zinc plated thumb screws provide tool-free fastening in applications where frequent hand adjustment is needed - panel access, test equipment, equipment calibration, anywhere that screwdriver access adds time and hassle. The large head with knurled or winged sides gives fingers enough grip to tighten and loosen without tools. Carbon steel thumb screws with zinc plating handle most industrial applications - the steel provides strength, the zinc plating provides corrosion resistance and a clean appearance. Yellow zinc is the most common standard finish; clear zinc looks brighter; black zinc provides a more technical aesthetic. For outdoor or marine applications, stainless steel thumb screws resist corrosion better than zinc-plated steel.
Thumb Screw vs. Standard Screw
Thumb screws are for hand operation - no tools, quick access, frequent adjustment. Standard screws are for tool operation - higher torque capacity, more secure clamping, less likely to loosen accidentally. Use thumb screws where hand access matters; use standard screws where clamping security matters.
FAQ
Q1: MOQ?
A1: 50 pieces for standard thumb screws.
Q2: Materials?
A2: Carbon steel with zinc plating (standard), stainless steel.
Q3: Thread sizes?
A3: Metric M3 through M20, Imperial #4 through 3/4 inch.
Q4: Surface finishes?
A4: Clear zinc, yellow zinc, black zinc plating.
Q5: Head styles?
A5: Knurled, flat, wing. Custom configurations available.
Q6: Outdoor use?
A6: Stainless steel recommended for outdoor and marine environments.
Quality is non-negotiable in precision manufacturing. Every component undergoes rigorous inspection at each stage of production.
- ISO 9001:2015 - Certified quality management system covering design, machining, and inspection
- Passivation / Electropolishing - ASTM A967 procedures for corrosion resistance
- Material Traceability - Heat number tracking from raw material to finished part
- First Article Inspection (FAI) - Full dimensional report included with every new order
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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