What is your minimum order quantity?

Our MOQ starts from 50 pieces per SKU, for both catalog items and custom OEM programs. Lower quantities for prototype or trial orders are negotiable — tell us about your project and we will work it out with you.

What is the typical lead time?

Standard products: 2-4 weeks. Custom projects: 4-8 weeks depending on tooling and approval process.

Do you support ODM / OEM projects?

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

Can you ship samples for evaluation?

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

How do I request a quotation?

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

Rotary latch

SL-4000-30 Top Drive Rotary Lock

The SL-4000-30 top drive rotary latch uses a compact top-mounted drive to deliver reliable latching where installation space above the door frame is limited.

SKU : sl-4000-30 · 4000-30 · 4000/30

The SL-4000-30 Top Drive Rotary Latch features a compact top drive design, delivering reliable latching where installation space above the door frame is limited. It supports single-stage and dual-stage configurations, with flexible mounting via a Ø6.4mm through hole or M6×1 threaded connection. Available in zinc-plated steel or stainless steel, the latch accommodates a pin strike up to 9.6mm and handles ultimate loads up to 3300N. Designed without a cushioning device for a simple, robust structure, it is well suited to industrial enclosures, lightweight equipment doors, and dust-proof sealing on special vehicles — and is ready for OEM volume supply and custom production to meet the high-reliability, long-service demands of engineering projects.

Rotary Latch Stainless Steel Industrial Hardware Enclosure Hardware

Key Features

Compact top drive design for space-restricted installations
Single-stage / dual-stage latching options
Flexible mounting: Ø6.4mm through hole or M6×1 thread
Material options: zinc-plated steel or stainless steel
Maximum pin strike: 9.6mm
Ultimate load capacity: 3300N
Simple, robust structure without cushioning device
OEM bulk supply and custom production supported

Detailed Specifications

Model	Grade & Direction	Mounting Method	Drive Method	Material
SL-4000-11-30 -10	Single stage (optional double stage), left	Ф6.4 through hole (optional M6x1 thread)	Top Drive	Galvanized Steel (Optional Stainless Steel)
SL-4000-21-30 -10	Single pole (optional double pole), right	Ф6.4 through hole (optional M6x1 thread)	Top Drive	Galvanized Steel (Optional Stainless Steel)