Master Lock S31LT Zenex™ Thermoplastic Safety Padlock – 76 mm Long Shackle
The Master Lock S31LT Zenex™ safety padlock features a lightweight thermoplastic body and a 76 mm long stainless steel shackle. Designed for lockout-tagout applications, it offers excellent corrosion resistance and reliable personal lockout security in harsh industrial environments.
| Weight | 0,12 kg |
|---|---|
| Dimensions | 13 × 4,5 × 2 cm |
| Colour: | Black, Blue, Green, Orange, Purple, Red, White, Yellow |
Questions about this product?
The S31LT Zenex padlock supports lockout-tagout tasks that need extra shackle clearance and strong corrosion resistance. This safety padlock suits daily industrial maintenance where clear personal lockout matters.
The padlock has a compact Zenex™ thermoplastic body with a width of 35 mm. The lightweight body makes daily handling easy. It resists chemicals, moisture, UV exposure, and extreme temperatures.
The S31LT Zenex padlock uses a 76 mm long shackle made from Marine Grade 316 stainless steel. This shackle resists corrosion in harsh environments. It fits easily on lockout devices, hasps, valves, and group lockout systems. This gives maintenance teams more flexibility at isolation points.
The padlock serves personal lockout-tagout use only. A high-security, reserved-for-safety cylinder keeps the key trapped until locking. This prevents unsafe use and supports clear ownership during maintenance work.
The S31LT Zenex padlock delivers a durable and easy-to-use solution for industrial lockout applications.
Features
- S31 thermoplastic safety padlock
- 4,76mm diameter shackle fits more applications
- Marine grade 316 stainless steel shackle provides superior corrosion resistance
- 35mm wide, 48mm tall thermoplastic body, with 38mm shackle length
- Patented design complies with the one employee, one lock, one key best practice
- Key retaining – ensures padlock is not accidentally left unlocked
- Stands up to chemicals, extreme temperatures, and is UV stable
- Includes English write-on “Danger” and “Property Of” labels; 14 language options available for global identification purposes
Keying options
“One Employee, One Lock, One Key”
It is important that each employee at a facility has a padlock key that is unique to them. Key charting is critical to prevent duplicate keys from entering the workplace and jeopardizing your lockout/tagout program.

A no-charge Safety Lockout Padlock Key Charting System – critical for Safety Lockout
- Key charting is a record of all the safety padlock key codes assigned to a facility
- It is important that each authorized employee at a site has a unique padlock key that only opens that employee’s safety padlock. This complies with the “one lock, one employee, one key” directive
- To help prevent duplicate keys from jeopardizing your lockout program, register your workplace with Master Lock. Once registered, Master Lock will send you an End User Identification Number for your site’s Key Chart.
- When you use that I.D. number on each additional padlock order, Master Lock will use a new key code for each padlock we manufacture for you. When used properly, this free service helps ensure that each employee caries a key unique to them, eliminating unwanted key duplication in a safety lockout program
KD – Each lock is opened by its own unique key which does not open any other lock in the set – complying with the “One lock, one employee, one key” mantra (standard delivery)
KA – All padlocks in the set are opened by the same key so only one key is necessary to open numerous padlocks – for employees who need many locks, they still only have one key
MK – A master key opens all locks within the system while each lock also has its own unique key – allows for responsible removal of improperly placed or forgotten lockouts according to your emergency notification policy (custom made to order deliver 4 to 6 weeks)




























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