3

M73 SL   VULCAN SCREW-LOCK     M735100B (040909)

(EN) ENGLISH

Only the techniques shown in the diagrams that are not crossed 

out and/or do not display a skull and crossbones symbol are 

authorized. Check our Web site regularly to find the latest 

versions of these documents: www.petzl.com 

Contact PETZL if you have any doubt or difficulty understanding 

these documents.

VULCAN SCREW-LOCK
Manual locking steel carabiner

- Connector EN 362: 2004 classe B 

- NFPA 1983 General use

Field of application

This equipment is personal protective equipment (PPE) used 

for fall protection. 

This carabiner is used to connect equipment together during 

rescue or work at height activities. 

This product must not be loaded beyond its strength rating, 

nor be used for any purpose other than that for which it is 

designed.

WARNING

Activities involving the use of this equipment are inherently 

dangerous. 

You are responsible for your own actions and decisions.

Before using this equipment, you must: 

- Read and understand all instructions for use. 

- Get specific training in its proper use. 

- Become acquainted with its capabilities and limitations. 

- Understand and accept the risks involved.

Failure to heed any of these warnings may result in severe 

injury or death.

Responsibility

WARNING, specific training in the activities defined in the field 

of application is essential before use. 

This product must only be used by competent and responsible 

persons, or those placed under the direct and visual control of 

a competent and responsible person. 

Gaining an adequate apprenticeship in appropriate techniques 

and methods of protection is your own responsibility. 

You personally assume all risks and responsibilities for all 

damage, injury or death which may occur during or following 

incorrect use of our products in any manner whatsoever. If you 

are not able, or not in a position to assume this responsibility 

or to take this risk, do not use this equipment.

Nomenclature of parts

(1) Frame, (2) Gate, (3) Hinge, (4) Locking sleeve, (5) Keylock, 

(6) Keylock slot, (7) Red alert. 

Principal materials: steel.

Inspection, points to verify

Before each use

Verify that the frame, hinge and locking sleeve are free of 

any cracks, deformation, corrosion, etc. Open the gate and 

verify that it closes itself automatically when released. The 

Keylock slot must not be blocked by any foreign matter (dirt, 

pebble, etc.).

During each use

It is important to regularly inspect the condition of the product.  

Make sure that all pieces of equipment are properly connected 

and positioned with respect to each other. 

Consult the details of the inspection procedure to be carried out 

for each item of PPE on the Web at www.petzl.com/ppe or on 

the PETZL PPE CD-ROM.

Compatibility

A connector must be compatible with the equipment to which it 

is attached (shape, size, etc.). 

An incompatible connection can affect the safety function of the 

system (for example, disconnection, breakage, etc.). 

WARNING if the connector is attached to an element of 

the system that is too large (for example wide slings, large 

bars, etc.) the connector’s strength can be reduced.

Working principle

Diagram 1. Manipulation
Diagram 2. Installation of the carabiner

This connector must always be used with the gate closed and 

locked. 

When the locking sleeve is open, the red warning indicator is 

visible. 

To lock the connector, screw the locking sleeve until it stops 

and blocks the gate from opening. 

WARNING, vibrations and/or rubbing can loosen the locking 

sleeve and unlock the connector. Check the connector regularly 

to verify that it is securely locked. 

The strength of the connector is greatly reduced if the gate is 

open. 

The carabiner is strongest when closed and loaded on its major 

axis. Any other position reduces its strength.

Diagram 3. Warning danger of death

Any external pressure on the gate (with a descender, for 

example) is dangerous. When a sudden tension comes onto the 

rope, the locking sleeve can break and the gate can open itself. 

The device or rope may detach itself from the connector. 

Remember: For your safety, get into the habit of always 

doubling-up your systems, especially carabiners.

Supplementary information 

regarding standards (EN 365)

If your application requires frequent opening and closing of 

a manual locking carabiner (multiple times in the course of a 

day’s work), you should use the autolocking TRIACT -LOCK 

version instead.

Rescue plan

You must have a rescue plan and the means to rapidly 

implement it in case of difficulties encountered while using this 

equipment.

Anchors

The anchor point for the system should preferably be located 

above the user’s position and should meet the requirements of 

the EN 795 standard (minimum strength of 10 kN).

Clearance: amount of free space below the user

The clearance below the user must be sufficient to prevent the 

user from striking any obstacle in case of a fall. (The length of 

the connector can influence the height of a fall).

Various

- Take care to minimize the potential for falls and the height of 

any potential fall. 

- WARNING, take care that your products do not rub against 

abrasive or sharp surfaces. 

- When using multiple pieces of equipment together, a 

dangerous situation can result if the safety function of one 

piece of equipment is affected by the safety function of another 

piece of equipment. 

- Users must be medically fit for activities at height. 

- You must verify the suitability of this equipment for use 

in your application with regard to applicable governmental 

regulations and other standards on occupational safety. 

- The instructions for use for each item of equipment used in 

conjunction with this product must be respected. 

- The instructions for use must be provided to users of this 

equipment in the language of the country in which the product 

is to be used.

Petzl general information

Lifetime / When to retire your equipment

For Petzl plastic and textile products, the maximum lifetime 

is 10 years from the date of manufacture. It is indefinite for 

metallic products. 

ATTENTION: an exceptional event can lead you to retire a 

product after only one use, depending on the type and intensity 

of usage and the environment of usage (harsh environments, 

sea, sharp edges, extreme temperatures, chemical 

products, etc.). 

A product must be retired when: 

- It is over 10 years old and made of plastic or textiles. 

- It has been subjected to a major fall (or load). 

- It fails to pass inspection. You have any doubt as to its 

reliability. 

- You do not know its full usage history. 

- When it becomes obsolete due to changes in legislation, 

standards, technique or incompatibility with other 

equipment, etc.

Destroy retired equipment to prevent further use.

Product inspection

In addition to the inspection before each use, an in-depth 

inspection must be carried out by a competent inspector. The 

frequency of the in-depth inspection must be governed by 

applicable legislation, and the type and the intensity of use. 

Petzl recommends an inspection at least once every 12 months. 

To help maintain product traceability, do not remove any 

markings or labels. 

Inspection results should be recorded on a form with the 

following details: type of equipment, model, manufacturer 

contact information, serial or individual number; dates 

of: manufacture, purchase, first use, next periodic inspection; 

notes: problems, comments; name and signature of the 

inspector. 

See an example at www.petzl.fr/ppe or on the Petzl PPE CD-

ROM.

Storage, transport

Store the product in a dry place away from exposure to UV, 

chemicals, extreme temperatures, etc. Clean and dry the 

product if necessary.

Modifications, repairs

Modifications and repairs outside of Petzl facilities are 

prohibited (except replacement parts).

3-year guarantee

Against all material or manufacturing defect. Exclusions: normal 

wear and tear, oxidation, modifications or alterations, incorrect 

storage, poor maintenance, negligence, uses for which this 

product is not designed.

Responsibility

PETZL is not responsible for the consequences, direct, indirect 

or accidental, or any other type of damage befalling or resulting 

from the use of its products.

Traceability and markings

a. Body controlling the manufacture of this PPE

b. Notified body that carried out the CE type inspection

c. Traceability: datamatrix = product reference + individual 

number

d. Diameter

e. Individual number

f. Year of manufacture

g. Day of manufacture

h. Control or name of inspector

i. Incrementation