Frequently Asked Questions

Yes. Material certificates, salt spray reports and third-party test reports are available on request. Tell us the standard or report type when you inquire, and we will confirm what can be provided for your order.

In most cases, yes — report requirements need to be agreed before ordering so scope and timing can be confirmed with production. Contact us with your specification.

Our MOQ starts from 100 pieces per SKU, for both catalog items and custom OEM programs. Smaller trial or prototype quantities can be discussed — tell us about your project and we will work it out with you.

Standard products: 15-20 days. Custom projects: 4-8 weeks depending on tooling and approval process.

Absolutely. Our engineering team can develop custom locks, latches and handles from concept to mass production.

Yes, standard product sample orders usually ship within 3-5 business days by air courier.

Use the contact form or email us with product SKU, estimated quantity and target market. We reply within 24 hours.

Our rotary latches are designed for ground support equipment, aviation transport cases and non-structural cabin interior equipment such as galley and stowage hardware. They are not certified for flight-critical airframe applications. If your program requires certified flight hardware, tell us the specification and we will confirm honestly whether our products fit.

Standard configurations operate from -40°C to +80°C, covering tarmac winters as well as closed containers parked in direct sun. We validate latch function through thermal cycling, and every unit is functionally tested before shipment. If your application sees temperatures outside this range, tell us your profile and we will propose suitable materials and lubricants.

Each lot ships with material certificates, dimensional inspection reports and batch traceability records. Salt spray results from our in-house laboratory are issued to ASTM B117 / ISO 9227, and third-party test reports are available on request. Your quality team can file the package directly into its own supplier approval system.

Yes. We offer weight-optimized geometries and material selections that keep the two-stage locking action intact. Send us your target weight and load requirements; our engineers respond with a proposal, and free STEP/DWG files arrive the next working day so you can check fit in your assembly model.

MOQ starts at 100 pieces per model, and samples ship in 20 to 35 working days depending on configuration. For qualification programs we support small pilot lots before you commit to volume orders, and we schedule production around your assembly plan.

Our marine-grade finishes are verified in our own laboratory to ASTM B117 / ISO 9227. Neutral salt spray results of 1,000+ hours are documented per batch, and test reports are available with your shipment.

Yes. A rotary latch wraps the striker in a positive two-stage engagement — it cannot back-drive open like a slam latch. That is why rotary designs are the standard choice on vessel doors, hatches and offshore panels.

For direct salt exposure we recommend stainless steel construction. Where weight and cost matter, zinc alloy with our marine-grade electrocoating is a proven alternative — every batch is salt-spray verified in-house with documented hours.

Yes. Cable-actuated variants let you place the release handle where it is safe and convenient. We advise on cable routing, bend radius and striker alignment, and can customize lever lengths and cable exits from 100 pieces.

The rotary pawl wraps the striker in a positive two-stage engagement — there is no spring-loaded tongue to rattle loose. Closing force stays consistent because engagement is mechanical, not friction-based.

Yes. Cable-actuated variants place the release point wherever your design needs it. We support cable routing, bend radius and striker alignment from specification stage, and customize cable exits from 100 pieces.

Our rotary latches are endurance-tested on in-house cycle rigs through hundreds of thousands of operations. Every production batch additionally passes 100% functional testing before packing, and batch records ship with your order.

Yes. We supply batch traceability, dimensional inspection records and salt spray test reports per order. Free STEP/DWG files support your maintenance documentation, and replacement-part supply follows the same 36-month 100% on-time delivery record.

As a rule of thumb: doors above roughly 800 mm benefit from multi-point latching, because gasket pressure bows large panels. A single rotary lock with rod linkage (top or bottom drive) covers two or three points from one handle. Send your door dimensions and gasket spec — we will confirm the layout.

Sealing performance depends on consistent compression — and that is where rotary latches excel: the two-stage engagement pulls the door to a defined, repeatable closed position. We match compression travel to your gasket hardness at specification stage so the IP target survives thermal cycling and vibration.

Yes. We supply structured keyed-alike (KA) and master-key (MK) programs across cabinet fleets and multi-site projects, with documented key schedules per project. Share your site structure and we will propose the keying plan.

Outdoor finishes are verified in our own salt spray laboratory to ASTM B117 / ISO 9227 with documented hours per batch. Depending on exposure, we recommend zinc-nickel plating, powder coating over zinc, or stainless steel construction. Test reports are available with your shipment.

Yes. We build structured keyed-alike (KA) and master-key (MK) programs for operators and tower companies, with documented key schedules per region or crew. One crew key can serve thousands of cabinets while management keys retain override.

Rotary latches engage around the striker with no exposed tongue to pry. Combined with shielded strikers, through-bolted installation and optional cylinder locks, the forced-entry resistance of the door line exceeds that of standard quarter-turn hardware.

Yes — provided compression system is specified for it. Gaskets harden in cold and relax in heat; we match latch compression travel to your gasket material across the temperature range at specification stage, so the IP target holds year-round.

Standard models ship quickly from stock programs; customized samples are delivered in 20–35 business days from confirmed drawings. Free STEP/DWG files are available within one business day so your design team can start immediately.

M = double protection inside and outside the door. The SLC3-2578 without M protects the outside only.

If washdown spray reaches both sides of the door, order the M. If only the outside sees washdown, the 2578 covers it at lower cost.

Deep door frames, offset striker positions, or long cam travel behind reinforced frames. Send a drawing if you are unsure; we check the geometry against your frame.

Same protection level and load; the difference is locking reach (69.4 mm vs 48/54.7 mm). Match it to your frame depth.

Replenishment of an existing 2575 program: order this model. New design: we will quote the 2578/2579 generation unless you have a reason to stay on 2575.

Yes, the mounting system is designed for thin sheet: nut to 17 N·m, screw to 8 N·m. For panels over 5 mm, use the SLC3 series (1–15 mm).

A1 SUS304 for dry areas and cost-driven projects; A2 SUS316 for splash zones with chlorine-based chemistry.

M when the door's inside also sees washdown or contamination risk. Otherwise the 2441 covers it.

Both cover 1–5 mm hygienic quarter-turn latching. SLC2 adds left/right rotation; SLD1 offers five body styles including special inserts (X45 on the 2442). Match your enclosure program and existing tooling.

Fixed-configuration variants of the SLD1-2441 body style: one latch, one order code, no insert or rotation options in the parts list. Ask for drawings to check which one matches your current hardware.

2441. The 2440 remains available for programs already running it.

Enclosure programs that standardized on this drive. If your spare-key stock is X45, order the 2442 and your existing tooling keeps working.

Yes, we offer master key, keyed alike and unique key combinations for most lock cylinders.

Yes — both, depending on your project.

• OEM: we manufacture to your drawings and specifications.
• ODM: we adapt an existing design from our range to your application — typically faster and more cost-effective.

Customization options include body geometry, keying configuration, surface finish, material grade, branding/engraving and packaging. Send your technical brief for a free feasibility assessment; we respond within 1–2 business days.

Common finishes include chrome plating, nickel plating, powder coating, black oxide and passivated stainless steel.

1. Contact us within 14 days of delivery with photos and a written description.
2. Our QC team reviews evidence and may request return of non-conforming parts.
3. Preliminary response within 3 business days.
4. For confirmed non-conformances: priority replacement shipment or full refund at our discretion.
5. For significant events: full 8D/CAPA report within 10 business days, including root cause and corrective actions.

All complaints are formally documented for audits.

All our products carry a 12-month warranty from date of shipment against manufacturing defects in materials and workmanship under normal intended-use conditions. Specific terms are defined in the purchase agreement. Warranty does not cover damage from incorrect installation, misuse, unauthorized modification or operation outside rated specifications. We investigate performance concerns even outside the formal warranty period.

Every latch is verified in our own facility before shipment. Salt spray corrosion testing is performed in-house to ASTM B117 / ISO 9227 (1,000+ hour tests available), and every unit passes 100% functional testing. Batch orders ship with AQL acceptance sampling records. Material certificates and salt spray test reports are available with each order, and third-party inspection can be arranged at order stage on request.

Yes. Keyed-alike (KA) and master-key (MK) programs are available across our pin tumbler cylinder and right-angle lock ranges. Keying requirements must be specified at order stage because they affect the production process and cannot be changed after manufacture. For complex multi-enclosure or tiered-access projects, our application engineering team can consult on the keying architecture at the design stage.

Technical support means direct access to engineers who work on product applications — not a general customer service team. Questions about installation, application suitability or product modification receive responses from people who can actually answer them. Email technical enquiries, application engineering consultations and CAD file requests are responded to within one business day.

Many products are UL FTTA2/FTTA8 certified and REACH compliant. ISO 9001 and IATF 16949 cover our factory.

Yes. Our engineering team maintains cross-reference data for Southco, EMKA, DIRAK, Industrilas and other leading brands. Submit the competitor part number and a brief application description; we identify the closest equivalent in our range or flag where a modification is needed. Response within 1–2 business days. No charge and no obligation.

Yes — for every product in our catalog, without exception and without registration. We supply:

• STEP files (.stp) — compatible with all major CAD platforms
• DWG files — 2D dimensional drawings with tolerances and hole patterns
• PDF datasheets — for quick reference and procurement documentation

Request via our engineering team and receive within one business day.

If you need a standard part from an established brand and price is not the primary factor, their distributor networks are efficient and reasonable. Our locks tend to be the better fit for custom configurations, tighter budgets, faster prototypes, or when you need direct technical dialogue rather than going through a distributor. We will give you an honest assessment if you send your requirements.

All prices are quoted in USD as standard; EUR available on request. Prices are EXW Xuzhou unless otherwise agreed. Supported methods:

• T/T bank wire transfer — standard for bulk orders
• L/C — available above threshold value
• PayPal — samples and prototypes (3–5% fee)
• Western Union — samples only

Deposit percentage, balance timing and Net 30/60 terms are negotiable based on order size and relationship history.

We support all standard international freight modes:

• Air freight (DHL/FedEx/UPS): best for samples and shipments under ~150 kg; 3–7 business days
• Sea freight LCL: cost-effective above ~0.5 CBM; 25–35 business days
• Sea freight FCL (20' / 40'): for orders above ~3 CBM; 25–35 business days
• China–Europe rail: 18–25 business days to major hubs
• Customer-nominated forwarder: we coordinate directly with your preferred partner

Standard Incoterms: FOB Qingdao or Shanghai. EXW Xuzhou available on request.

We do not mark up freight; you pay the actual carrier rate. For reference, a DHL Express sample shipment from Xuzhou to major US and European destinations typically ranges from USD $50–$100 for a 2–3 kg parcel, delivered in 4–5 business days. Use the carrier online calculator for an exact quote. Bulk quotations include estimated freight, or your forwarder can quote directly.

All prices are EXW — import duties, customs clearance fees, VAT/GST and destination-country taxes are the buyer's responsibility. HS Code: 8301 — padlocks and locks of base metal. Indicative MFN duty rates: USA 3–7%, EU 2–6%, UK 2–4%, Canada 0–6%, Australia 0–5%. Confirm with your customs broker. We provide compliant export documentation and do not undervalue invoices.

Yes. For time-critical shipments we arrange DHL Express Priority — delivery to major US and European cities in 1–2 business days from Xuzhou dispatch. Priority service typically costs 1.5–2× the standard DHL Express rate. Same-day dispatch cut-off is 14:00 CST on business days. Contact us before ordering to confirm feasibility.

Standard catalog products: 14-calendar-day return window from confirmed delivery. Item must be unused, in original packaging with documentation. Return shipping at buyer's expense. Refund within 10 business days of receipt and inspection. No restocking fee for quality-related returns; 10% restocking fee for buyer-requested returns above USD $1,000.

Custom / OEM products: produced to buyer-approved specifications and not eligible for standard returns. Quality non-conformances are handled under the quality complaint process.