Stainless Steel SS304 18-8 Threaded Knurled Thumb Nut Black Knobs Clamping Screw Grip Knob Screw

描述

1.Premium Corrosion Resistance & Mechanical Strength

Head Material: PP

Thread Material: Stainless Steel304

Manufactured from 304-grade stainless steel with deep, precision knurling, these thumb nuts and clamping screws resist rust, oxidation, and most chemicals. Typical tensile strength is ~520 MPa with excellent yield behavior, and a black-oxide or electro-polished finish (Ra ≤ 0.8 µm) ensures smooth engagement and long service life.

2.Versatile Application Spectrum

Widely used in printing, instrumentation, industrial, lathes, sawing machines, woodworking machinery, 3D printer beds, mechanica, grinding machine, etc. Ideal for tool-free fastening and repeatable adjustments in machine-tool fixtures, jigs, laboratory instruments, photographic and lighting rigs, electronics enclosures, furniture assemblies, and packaging machinery. Standard ISO-metric threads (M4–M16) and knob diameters (12–30 mm) guarantee plug-and-play compatibility across industrial and DIY projects.

3.Effortless, Tool-Free Operation
Oversized knurled surfaces and ergonomic black thermoplastic or metal-knurled heads deliver secure finger-tightening up to 5–8 Nm without wrenches or screwdrivers. The high-contrast finish aids quick visual alignment, while low-profile designs prevent snagging in tight spaces.

4.Certified Quality & Long-Term Reliability
Produced in ISO 9001-certified facilities to DIN 319/Tolerances (±0.1 mm). Each batch undergoes dimensional inspection, hardness testing, and coating-thickness verification (≥8 µm). Salt-spray resistance exceeds 240 hours per ASTM B117, with full material traceability and RoHS compliance.