Stainless Steel 316 CNC Machined Hanging Ring Screws

A: AISI 316 stainless steel contains molybdenum, which significantly increases its resistance to corrosion, particularly from chlorides and acids. This makes it the "marine-grade" choice, ideal for environments with saltwater, pool chemicals, industrial solvents, or exposure to harsh weather. 304 is adequate for general purposes, but 316 is superior for demanding or corrosive applications.

A: The safe working load (SWL) or working load limit (WLL) varies significantly by size (thread diameter). It is critical to never exceed the SWL. The SWL is typically 1/4 or 1/5 of the minimum breaking load (a 4:1 or 5:1 safety factor). Please refer to the specific Load Ratings Table in our product specifications for each size. For example, an M10 screw may have a SWL of 6.6 kN (~673 kg). Always consult the technical data for your specific model.

A: AISI 316 fasteners are generally rated for continuous service temperatures from -60 °C to 200°C (-76°F to 392°F). For short-term exposure, they can handle higher temperatures, but mechanical properties may start to degrade above 400°C (752°F).

A: CNC machining from solid bar stock eliminates the porosity, inclusions, and potential internal voids that can occur in cast products. This results in:

• Higher Strength: A continuous grain structure provides superior tensile and fatigue strength.
• Greater Reliability: No hidden internal defects, which is critical for safety.
• Precision: Exceptional dimensional accuracy and perfect threads for secure fastening.

A: Yes. We can supply a Mill Test Certificate (MTC) or Certificate of Conformity 3.1 with your order, which verifies the chemical composition and mechanical properties of the raw material, ensuring it meets AISI 316 standards.

A: Incorrect installation is a major cause of failure.

1. Pilot Hole: Drill a pilot hole slightly smaller than the root diameter of the screw's thread.
2. Engagement Depth: Ensure the threaded shank is fully engaged in the material. A general rule is an engagement depth of at least 1.5 times the thread diameter (e.g., for an M10 screw, engage at least 15mm of thread).
3. Tightening: Tighten firmly using a wrench on the hexagonal shoulder (if present) or the ring itself. Do not overtighten, as this can gall the stainless steel threads.
4. Alignment: The load should be applied along the axis of the screw. Avoid side-loading or angular forces unless the design is specifically for it.

A: They are ideal for:

• Marine: Deck hardware, boat rigging, sailboat fittings.
• Architectural: Hanging lighting fixtures, artwork, signage, ceiling systems.
• Industrial: Securing equipment, machinery components, chain hoists, rigging.
• Automotive: Tie-down points, custom fabrication.
• Theatrical: Stage rigging for lights and scenery (within rated limits).

A: Absolutely. As a specialist in CNC machining, we excel at custom orders. We can produce:

• Non-standard thread sizes (e.g., UNF, BSW) and lengths
• Custom ring diameters (O.D.) and thicknesses
• Special markings or finishes (e.g., electropolishing, passivation)

Please contact us with your drawings or specifications for a custom quote.

A: Our standard MOQ is low, often starting at 1000 pieces for common sizes.

A: Sample orders are typically processed and shipped within 3-5 working days. Production order lead times are generally 30-45 days after order confirmation, depending on order volume and customization.