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Brand: Petzl
Petzl OK TRIACT-LOCK Aluminum Oval Carabiner
Description
An oval aluminum carabiner for pulleys, rope clamps and fall arresters
The Petzl OK (reference M33A TL for the TRIACT-LOCK version) is a lightweight aluminum oval carabiner. Its symmetrical oval shape allows optimal loading of devices with a wide cross-section such as pulleys, rope clamps and mobile fall arresters, and its fluid interior design limits catch points and helps the carabiner rotate. The Keylock system means the body-and-gate interface has no hook that could snag on anchors, ropes or harness equipment loops.
It comes with three locking systems: automatic TRIACT-LOCK with triple-action gate opening, automatic BALL-LOCK with a lock indicator, and manual SCREW-LOCK with a red band that is visible only when the carabiner is not locked. The CAPTIV bar can be fitted to keep the carabiner positioned along its major axis, to limit flipping and to keep it integrated with the device.
Technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Petzl |
| Model | OK oval carabiner |
| Material | Aluminum, H cross-section |
| Standards as printed | CE EN 362, 12275 type B, EAC, GB/T 23469 / B, XF 494:FZL-G-Q, Japanese fall-protection regulation |
| Major axis strength | 25 kN |
| Minor axis strength | 8 kN |
| Open gate strength | 7 kN |
| Gate opening | 22 mm (23 mm for BALL-LOCK) |
| Lifespan | Unlimited, subject to inspection |
| Manufacturer Guarantee | 3 years |
Locking systems and references
| Reference | Locking system | Colour | Weight | Gate opening |
|---|---|---|---|---|
| M33A TL | TRIACT-LOCK | Gray | 75 g | 22 mm |
| M33A TLN | TRIACT-LOCK | Black | 75 g | 22 mm |
| M33A SL | SCREW-LOCK | Gray | 70 g | 22 mm |
| M33A SLN | SCREW-LOCK | Black | 70 g | 22 mm |
| M33A BL | BALL-LOCK | Gray | 75 g | 23 mm |
Choosing the locking system and loading it correctly
Automatic TRIACT-LOCK and BALL-LOCK gates relock without manual action, which suits connectors that are opened and closed many times a day. The manual SCREW-LOCK version is chosen where the user must close the sleeve deliberately, and its red band is a visual check. The instructions for use stress that a carabiner is strongest when loaded on the major axis with the gate closed; loading it on the minor axis or with the gate open reduces strength, so the figures above for minor axis and open gate must be respected.
Before each use check the frame, rivet, gate and locking sleeve, verify that the gate opens and closes automatically and completely, and make sure the Keylock hole is not blocked. Petzl recommends a detailed inspection by a competent person at least once every 12 months. When used in a fall-arrest system, the anchor must meet EN 795 (12 kN minimum strength).
Related Petzl products: Petzl ASAP LOCK Mobile Fall Arrester for Rope, Petzl ABSORBICA-Y MGO International Energy-Absorbing Lanyard, Petzl GRILLON Adjustable Work-Positioning Lanyard, Petzl NEWTON International Version Fall-Arrest Harness, Petzl VOLT International Version Tower Work Harness and Petzl I'.
Documents and quotation
The attached Petzl instructions for use cover the Petzl locking carabiners including the OK. Confirm the exact reference, size or length, the standard required on site (CE, ANSI or CSA) and the compatibility of every component before ordering. For a quotation, send the reference, quantity and intended use. Browse more Safety and PPE products on this site.
Datasheets & Documents
- Instruction Manual Petzl locking carabiners (OK, TRIACT-LOCK, SCREW-LOCK, BALL-LOCK) Instructions for Use (multilingual) Download
Reviews (0)
About brand
Petzl is a French maker of work-at-height, rope access, climbing and caving equipment and headlamps, based in Crolles near Grenoble. The business grew from the work of cave explorer Fernand Petzl, a metal machinist who built rope ascenders and other caving tools, and became a company in the mid-1970s with his son Paul, who leads it today.
Seven Star LLC is an independent supplier in Muscat. We list Petzl professional fall protection equipment for industrial, telecom and construction teams in Oman and the GCC.
Petzl company profile
| Origin | Caving equipment designed by Fernand Petzl, Crolles, France |
|---|---|
| Company formed | Mid-1970s, by Fernand and Paul Petzl |
| Headquarters | Crolles, Isère, France |
| Leadership | Paul Petzl, President |
| Product families | Fall arrest and work positioning harnesses (AVAO, ASTRO), descenders such as I'D and RIG, ascenders, lanyards and energy absorbers, VERTEX and STRATO helmets, ATEX headlamps, rescue and confined-space kits |
Milestones
- 1968: Fernand Petzl builds the rope ascender later sold as the Croll.
- 1970s: Fernand and Paul Petzl turn the work into a company in Crolles.
Petzl product series
Harnesses include the NEWTON fall-arrest harness, the AVAO FAST work harness and the VOLT harness for tower and pylon work, all in international versions. Fall arrest and lanyards include the ASAP LOCK mobile fall arrester for rope with the ASAP'SORBER energy absorber, the ABSORBICA-Y MGO energy-absorbing lanyard and the GRILLON adjustable work-positioning lanyard.
Descenders include the I'D S self-braking descender with anti-panic function and the I'D EVAC for rescue lowering. Connectors and anchors include the OK TRIACT-LOCK oval carabiner and the ANNEAU sewn sling, and head protection includes the VERTEX VENT and STRATO VENT helmets.
Where Petzl equipment is used
Telecom and wind towers, transmission pylons, scaffolding and steel erection, tank and vessel inspection, rope access maintenance and rescue teams. Fall protection equipment must be combined into a compatible system and inspected as the manufacturer instructs.
Petzl products we list
Ordering Petzl equipment: what we need
Send the full reference printed on the product or in the Petzl catalogue, for example C073BA01, together with the size and the standard required for the site, such as EN 361 or ANSI Z359.11. Include the intended use and the number of users so a compatible set can be quoted.
Facts checked against published Petzl company histories, October 2026.
Browse Petzl products by category: Fall Protection.
FAQ
Questions about the Petzl OK TRIACT-LOCK Aluminum Oval Carabiner
Answers from our engineering team on installation, compatibility and integration.
01What is the Petzl OK carabiner?
A lightweight aluminum oval carabiner with a Keylock system, available with TRIACT-LOCK, BALL-LOCK or SCREW-LOCK.
02What is the major axis strength?
25 kN, with 8 kN on the minor axis and 7 kN with the gate open.
03Which standards are printed?
CE EN 362, EN 12275 type B, EAC, GB/T 23469 / B and XF 494:FZL-G-Q.
04What does the red band on the SCREW-LOCK version show?
It is visible only when the carabiner is not locked.
05What is the CAPTIV bar for?
It keeps the carabiner positioned along its major axis, limits flipping and keeps it integrated with the device.
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