NRH 5808-128KS Square Dual Security Toggle Latch – SUS304 Padlock Hole + Secondary Lock

NRH 5808-128KS Square Dual Security Toggle Latch - SUS304 Stainless Steel, Vibratory Finish, Padlock Hole + Secondary Lock, Double Protection

For aviation cases, military equipment, medical devices, and other high-security applications where theft and accidental opening are both concerns, single-lock solutions are insufficient. The NRH 5808-128KS is a square dual security toggle latch - the suffix "K" indicates a padlock hole, and the suffix "S" indicates a secondary safety lock. This dual design provides both physical theft deterrence and vibration-proof accidental opening prevention. Made from SUS304 stainless steel with a smooth vibratory finish, it offers excellent corrosion resistance and a hygienic satin surface. The over-center mechanism provides stable clamping force, while an independent secondary safety lock prevents accidental opening due to vibration or unintended contact. A dedicated padlock hole accepts a standard padlock for physical security. Weighing just 127g with a 588N (approx. 60kg) load capacity, it is robust yet manageable. Overall length is approximately 128mm with a square compact appearance for space-constrained installations. Mounting holes are 6×Ø4.2mm for simple surface mounting. Widely used on aviation cases, military boxes, medical equipment, firefighting cases, heavy-duty luggage, and industrial machinery. Clear NRH branding and heritage since 1996 assure quality.

Manufactured under ISO 9001. REACH, RoHS compliance available on request. OEM/ODM modifications (finish, logo) welcome. 2D/3D CAD drawings supplied.

Key dimensions (see drawing): overall length approx. 128mm, mounting holes 6×Ø4.2mm. Refer to engineering drawing for other dimensions.

1. Dual Security Design: Padlock Hole + Secondary Lock

Padlock Hole (K suffix) - Physical Theft Deterrence
When the latch is closed, the padlock hole aligns with a corresponding hole on the base, allowing a standard padlock to be inserted. This physically prevents the handle from being lifted, providing effective theft protection for valuable cargo.

Secondary Safety Lock (S suffix) - Accidental Opening Prevention
A spring-loaded secondary lock automatically engages when the handle is fully closed, blocking the handle from lifting. The user must manually release the safety lock before opening, preventing vibration or unintended contact from causing an accidental release.

Double Protection
The combination of a padlock hole and a secondary safety lock provides comprehensive security - preventing both intentional tampering (theft) and accidental opening (vibration).

2. Square Design & Material Advantages

Square-Type Appearance & Low Profile
The square-type design allows installation in tight spaces, making it suitable for aviation cases, power supply boxes, and military cases.

Full Stainless Steel (SUS304)
Manufactured from Japanese standard SUS304 austenitic stainless steel (18% Cr, 8% Ni), offering excellent resistance to acids, alkalis, and salt spray - essential for medical devices, marine applications, and outdoor cases.

Vibratory Finish
The vibratory finishing process creates a smooth, satin surface that is burr-free, easy to clean, and prevents bacterial entrapment - critical for medical and food-contact environments.

High Load Capacity (588N / approx. 60kg)
This model features a high 588N load capacity, suitable for heavy aviation cases, large medical equipment, and industrial machinery guards.

3. Working Principle

• Over-center primary lock: Press the handle past dead center - the mechanism self-locks, generating constant clamping force that resists vibration.
• Secondary safety lock auto-engagement: When fully closed, a spring-loaded safety tab snaps into a groove, blocking the handle. Manual release is required to open.
• Padlock hole locking: When closed, insert a standard padlock to physically lock the handle in place.

4. Detailed Applications & Industry Examples

• Aviation flight cases / road cases - Padlock prevents theft, secondary lock prevents vibration pop-open.
• Military cases / tactical equipment boxes - High-security applications demand both theft protection and accidental opening prevention.
• Medical equipment / sterilizer containers - SUS304 withstands steam corrosion, secondary lock prevents unauthorized access.
• Firefighting cases / emergency response boxes - Secondary lock prevents accidental pop-open; padlock can be added as needed.
• Heavy-duty luggage / industrial equipment cases - 60kg load capacity handles heavy loads; padlock provides security.
• Power supply boxes / electrical enclosures - Padlock prevents unauthorized access; secondary lock prevents accidental opening.
• Marine equipment boxes / offshore engineering gear - SUS304 resists salt spray; padlock provides theft protection.
• Import/export wooden crates / packing boxes - Padlock prevents tampering during transit; secondary lock prevents pop-open.

5. Installation & Maintenance Guidelines

• Mounting: Drill mounting holes per engineering drawing. Use M4 screws through 6×Ø4.2mm holes. Add washers inside the panel to distribute pull forces.
• Testing: After installation, test open/close several times. Ensure over-center snap is crisp, secondary lock engages automatically, and padlock hole aligns correctly.
• Maintenance: Periodically inspect for rust, deformation, or debris. Store in a dry place. Lubricate the safety lock slide lightly every six months.
• Padlock selection: Use standard padlocks to ensure the shackle fits through the padlock hole.

6. Technical Specifications

• Brand/Model: NRH 5808-128KS (with Padlock Hole + Secondary Lock)
• Product Type: Square Dual Security Toggle Latch
• Material: SUS304 Stainless Steel
• Finish: Vibratory Finishing (satin)
• Weight: 127g
• Load Capacity: 588N (approx. 60kg static pull)
• Overall Length (approx.): 128mm
• Mounting Holes: 6×Ø4.2mm (surface mount)
• Security Features: Padlock Hole + Independent Secondary Lock
• Operating Temperature: -20°C to +80°C
• Compliance: ISO 9001 certified; REACH, RoHS available on request.
• Manufacturer: NRH Box Hardware, established 1996. OEM/ODM welcome.

7. Why Choose NRH 5808-128KS Dual Security Square Toggle Latch?

• Dual security - Padlock hole (theft prevention) + Secondary lock (accidental opening prevention).
• High load capacity - 588N (approx. 60kg) - suitable for heavy applications.
• Corrosion-resistant - SUS304 stainless steel with vibratory finish.
• Square compact appearance - Space-saving design.
• Over-center self-locking - Vibration-proof.
• Customizable - OEM/ODM options available.

If you need a dual-security square toggle latch for aviation cases, military equipment, medical devices, or industrial machinery - combining padlock theft protection with a secondary safety lock - the NRH 5808-128KS is a proven solution. Contact NRH sales for samples, 2D/3D CAD files, or technical support.