Master Lock 410GRN Lockout Tagout Padlock — Green

The Master Lock 410GRN green safety padlock brings Master Lock's iconic brand recognition and universal availability to LOTO color-coding programs that assign green to a specific trade, department, or environmental/maintenance crew. Master Lock is the most widely recognized padlock brand in North America, which means the 410GRN is immediately identified as a safety padlock by any worker who encounters it on a lockout hasp — a practical benefit in facilities with mixed workforces or rotating contractor crews unfamiliar with the facility's specific LOTO equipment. OSHA 29 CFR 1910.147 compliant and priced for budget-conscious safety programs, the 410GRN is a reliable standard-duty LOTO padlock for general industry applications.

Key Features

• Master Lock brand — most widely recognized safety padlock in North American industry
• GREEN safety color — for facilities assigning green to a specific trade, environmental crew, or department
• Safety-specific design: non-rekeyable, exclusively for LOTO personal-protection use
• Steel body construction — standard-duty for general industrial environments
• Hardened steel shackle fits standard lockout hasps and LOTO hardware
• OSHA 29 CFR 1910.147 compliant — durable, substantial, and identifiable
• Master Lock brand recognition provides immediate visual identification as a LOTO device

Product Specifications

Detailed Description

The Master Lock 410 series is one of the original purpose-built safety padlock lines in the North American market. Master Lock introduced safety-specific padlock variants in response to OSHA's 1989 lockout/tagout standard, and the 410 series has been specified in written LOTO programs across virtually every industry sector for over three decades. The 410GRN's green body is the color-coded variant for programs that have assigned green to a specific trade or function.

Green carries specific meaning in industrial color-coding contexts. In ANSI Z535 signage standards, green indicates safety or first aid. In LOTO color-coding programs, facilities commonly assign green to environmental technicians, process operators with environmental compliance responsibilities, or contractors performing environmental sampling and remediation work. Some facilities use green for their general maintenance crew to distinguish them from electrical (red) and mechanical contractor (blue) lockout workers. The assignment is documented in the written LOTO program — what matters is consistency and training.

Master Lock's brand recognition is a practical operational benefit that is easy to underestimate. Every industrial worker in North America has encountered a Master Lock padlock at some point in their career, and the Master Lock name on a green body immediately signals "this is a safety lock — it is here for a reason." In facilities with high contractor turnover or seasonal workers who may not have received site-specific LOTO training before starting work, the universal recognizability of the Master Lock brand contributes to behavioral compliance — workers are less likely to question or interfere with a lock they recognize as a serious safety device.

The 410GRN uses a steel body construction appropriate for standard-duty general industrial environments — light to medium manufacturing, assembly operations, utilities, and commercial maintenance. For extreme environments involving foundry heat, heavy impact, or sustained chemical exposure, the American Lock A-series (Master Lock's heavy industrial brand) is a more appropriate specification. The 410GRN is the right tool for the broad middle of the general industry market where a reliable, budget-appropriate, OSHA-compliant safety padlock is the primary requirement.

Master Lock designs the 410 series as a non-rekeyable safety lock, which is an intentional design choice: a LOTO padlock that cannot be rekeyed cannot have its key changed without the safety manager's documented process, maintaining the integrity of the key control requirement in your written LOTO program. This is distinct from hardware-store padlocks where rekeying is a standard service.

The 410GRN is available individually for single-worker issuance or in quantity packs for equipping entire departments. Pairing individual 410GRN locks with a Master Lock lockout station and multi-lock hasp creates a complete, cost-effective LOTO setup for maintenance bays, electrical panels, and machine guarding isolation points.

Compliance and Standards

• OSHA 29 CFR 1910.147 — Control of Hazardous Energy (Lockout/Tagout)
• Meets OSHA substantive requirements: durable, substantial, standardized, and identifiable
• Suitable for use in LOTO programs governed by NFPA 70E and CSA Z460

Real-World Benefits

Safety managers at mid-size manufacturing plants report that switching to Master Lock 410-series color-coded locks from generic padlocks immediately improved visual compliance audits. Workers and supervisors recognize the distinctive shape and branding of the 410 series as "this is a LOTO lock" — which reinforces the behavioral component of LOTO compliance without additional training overhead.

Budget-conscious EHS programs appreciate the 410GRN's price point, which allows complete crew issuance of individual personal locks without straining consumable safety equipment budgets. When combined with a documented LOTO written program and proper employee training, an economy-tier personal padlock from a recognized brand is fully compliant and provides the same legal protection as a premium LOTO padlock.

Applications and Use Cases

• Environmental technicians and EHS personnel assigned green in multi-color LOTO programs
• General maintenance crews distinguished from electrical and mechanical contractor lockout workers
• Process operators with environmental compliance responsibilities at process industry facilities
• Budget-conscious LOTO programs requiring OSHA-compliant personal locks at accessible price points
• Facilities standardizing on Master Lock brand across their entire LOTO padlock inventory
• Replacement locks for workers whose previous green padlock was lost or damaged

Related Products

• Shop All Lockout/Tagout Equipment
• American Lock A1107R Red Safety Lockout Padlock (Heavy-Duty)
• Personal Protective Equipment (PPE)
• ABUS 74/40 Lockout Tagout Padlocks — 10-Pack
• Brady SafeKey Aluminum LOTO Padlock — Keyed Different

Frequently Asked Questions

What is the Master Lock 410 series and how does it differ from standard Master Lock padlocks?

The Master Lock 410 series is specifically engineered for lockout/tagout applications. It is non-rekeyable by design, available in safety colors (red, green, yellow, orange, blue, purple), and meets OSHA 1910.147 substantive requirements for lockout devices. Standard Master Lock padlocks are general-purpose security devices — the 410 series is purpose-built for LOTO personal protection.

Why does green color matter in LOTO programs?

Color coding in LOTO programs provides visual identification of which trade or department has locked out a given isolation point. Green is commonly assigned to environmental technicians, process operators, or a specific maintenance crew. The color assignment itself is not mandated by OSHA — what matters is that your written LOTO program documents the assignment and all authorized employees are trained on it.

Is the Master Lock 410GRN keyed-different or keyed-alike?

Master Lock offers the 410 series in both keyed-different (standard for personal-lock LOTO compliance) and keyed-alike (for supervisor/safety officer master-key use). Specify your keying requirement when ordering. Keyed-different ensures each worker's lock can only be removed by that worker; keyed-alike allows one supervisor key to open all locks in the set.

How does the Master Lock 410GRN compare to the American Lock A1107R for heavy industrial use?

The 410GRN is a standard-duty steel-body lock appropriate for general industry applications. The American Lock A1107R features a heavier steel body with heel-and-toe shackle locking and a patented keyway, designed for demanding environments like foundries, refineries, and mining operations. If your environment involves significant heat, impact, or chemical exposure, the A1107R is the correct specification.

Can I buy Master Lock 410GRN in quantity for a full crew?

Yes. Master Lock 410-series padlocks are available in single units and in quantity packs. Contact WCSafety to discuss quantity pricing for equipping a full department or contractor crew with green personal LOTO locks. Volume orders are common for facilities standing up new LOTO programs or replacing existing inventories.

Does the 410GRN fit all standard safety hasps?

Yes. The 410GRN shackle diameter is compatible with standard North American safety hasps from Master Lock, Brady, ABUS, and American Lock. The steel body is sized to the standard LOTO padlock form factor used across the industry.

How do I incorporate the 410GRN into a complete LOTO program?

Issue one 410GRN (keyed-different) to each authorized employee in your green-assigned department. Document the key code and employee assignment in your LOTO written program's key registry. Store a documented spare key for each lock in a controlled location per your emergency exception procedure. Mount locks on a Master Lock or Brady lockout station adjacent to the energy isolation points they are used for, and train all authorized employees on the procedure before they work independently under LOTO.