R5103-75K Heavy Duty Toggle Latch with Padlock Hole, Nickel Plated SPCC

NRH R5103-75K Heavy Duty Toggle Latch - Padlock Hole, Nickel Plated, 25kg Load, Industrial Security

The NRH R5103-75K is a robust toggle latch designed for applications that demand both a powerful clamping force and the option for physical security via a padlock. Constructed from SPCC cold‑rolled steel with a bright nickel plating finish, it offers high strength, good corrosion resistance, and a professional silver appearance. The over‑center toggle mechanism delivers a reliable 245N (25kg) tensile load for tight, vibration‑resistant closure. The integrated padlock hole on the latch hook allows a standard padlock to be added, upgrading security from “fastened” to “locked” against unauthorized access. Weighing only 31g and with a compact arm span of approximately 74mm, it is ideal for heavy‑duty industrial cabinets, machinery guards, and secure storage cases. Clear “NRH” branding ensures authenticity and quality.

As a product of NRH Box Hardware (specialist since 1996), this latch is manufactured under an ISO 9001 certified system. Regarding international compliance (ISO 9001, SGS, REACH, RoHS, SVHC), these standards can be supported based on customer requirements - contact us for details. OEM/ODM services are available for custom hole patterns, lever lengths, or logo engraving. Full 2D/3D CAD models available upon request.

Key dimensions: overall arm span approx. 74mm, mounting plate width 28mm, material thickness 1.3mm, with 4×Φ4.2mm mounting holes. Padlock hole diameter as shown in drawing - fits standard padlocks. Refer to the engineering drawing for complete dimensional data.

Why Nickel Plated Steel + Padlock Hole?

SPCC cold‑rolled steel provides excellent strength and formability at a cost‑effective price point. The nickel plating adds a bright, corrosion‑resistant surface that outperforms standard zinc plating in many industrial environments. The integrated padlock hole is a critical security upgrade:

• Physical theft deterrence - a padlock prevents the latch from being opened without a key
• LOTO compliance - allows padlock to be added for Lockout/Tagout procedures during maintenance
• Tamper evidence - security seals or wire ties can be used for audit trails
• Ready to use - no drilling or modification required

Primary Applications - Heavy Duty with Optional Locking

• Heavy‑duty industrial cabinets & enclosures - electrical control panels, server racks, machinery housings - lock to prevent unauthorized access
• Machinery safety guards & access hatches - secure heavy guards with option for safety padlock (LOTO)
• Secure storage & transport cases - heavy toolboxes, generator cases, ammunition crates, sensitive equipment containers - lockable security
• Outdoor telecom & utility boxes - field‑deployed cabinets for communication or power distribution - padlock provides theft deterrence

How It Works - Over‑Center Toggle with Padlock Security

The latch operates on a classic over‑center toggle mechanism. When the lever is pressed down, the hook engages a strike plate and passes its mechanical center point, creating a self‑locking hold that resists vibration and accidental opening. The 25kg (245N) clamping force pulls the two surfaces tightly together for a rattle‑free seal. To add security, insert a standard padlock through the padlock hole on the hook. The shackle physically prevents the hook from being lifted, making unauthorized opening impossible without cutting the lock. To release, unlock the padlock then lift the lever.

Key Advantages

• Padlock‑ready security - integrated hole accepts standard padlocks for theft deterrence and LOTO
• 25kg (245N) holding force - reliable for medium‑heavy doors, lids, and panels
• Nickel‑plated steel construction - strong, corrosion‑resistant, bright finish
• Compact, robust dimensions - 74mm arm span, 31g weight - fits tight spaces
• Tool‑free operation - one‑handed open/close for daily access; padlock for security
• Precision mounting - 4×Φ4.2mm holes with 1.3mm material thickness
• OEM/ODM ready - custom hole sizes, lever shapes, logo engraving available

Technical Specifications

• Brand: NRH Box Hardware
• Model Number: R5103-75K
• Product Name: Toggle Latch (Lockable)
• Material: SPCC Cold‑Rolled Steel + Nickel Plating
• Finish: Nickel Plating
• Security Feature: Integrated Padlock Hole
• Net Weight: 31g
• Tensile Load: 245N (25kg)
• Key Dimensions: Arm Span approx. 74mm, Mounting Plate Width 28mm, Material Thickness 1.3mm, Mounting Holes 4×Φ4.2mm (refer to engineering drawing)
• Compliance: ISO 9001, SGS, REACH, RoHS, SVHC (available upon request - contact us for details)
• Note: Data for reference only. Manufacturer Since 1996. OEM/ODM Services Available. 2D/3D CAD on request.

Why Trust NRH

NRH Box Hardware has been designing and manufacturing industrial latches, hinges, and handles since 1996. The R5103-75K is produced under ISO 9001 certified quality control with full batch traceability. Its padlock‑ready design is tested for thousands of cycles to ensure reliable security in industrial, telecom, and outdoor applications. For a cost‑effective, high‑strength, lockable toggle latch with a bright nickel finish, NRH delivers proven quality.