Silver Carbon Steel Thumb Screw Galvanized Rack Screw

description

1.Superior Mechanical Performance
Manufactured from quenched-and-tempered alloy/carbon steel, these thumb-rack screws deliver tensile strengths of ≥800 MPa and yield strengths of ≥600 MPa, with a core hardness of 28–35 HRC. A robust hot-dip or electro-galvanized zinc coating (8–12 μm) provides moderate corrosion resistance and preserves precise thread engagement in 10–32 or M6 rack rails.

2.Versatile Application Range
Widely used in various fields. It is not only able to meet the needs of home and office places, but also suitable for industrial and construction fasteners. Such as home and office appliances, TV wall mounts, communication equipment, electronic equipment and industrial and construction fasteners.  Ideal for mounting and adjusting panels, shelves, and equipment in server cabinets, network and AV racks, industrial enclosures, telecom frames, electrical control panels, and storage shelving. Standard rack-unit form factors (U-spacing) ensure seamless compatibility with 19″ and 23″ rack systems.

3.Effortless Tool-Free Operation
The large knurled thumb head offers secure, ergonomic finger-turn installation up to 4–6 Nm, eliminating the need for screwdrivers or wrenches. Quick-release action and repeatable torque control speed up rack reconfiguration, equipment service, and field maintenance.

4.Certified Quality & Durability
Produced in ISO 9001-certified facilities, each batch undergoes dimensional inspection (±0.1 mm), hardness testing, and coating-thickness verification. Zinc plating meets or exceeds 72 hours salt-spray resistance per ASTM B117. Full material traceability and batch certificates ensure consistent performance in demanding rack-mount environments.