Tighten and loosen nuts and bolts with the open end or the polygonal ring end.

Extension for socket wrenches Fervi PN402N400A
Key features
- Connection3/4"
- Weight (kg)1,38
- Dimensions (mm)475 × 60 × 40
What it is
The Fervi PN402N400A extension bar is an accessory with a 3/4" drive designed to reach particularly recessed tightening points. The dimensions of 475x60x40 mm and the weight of 1.38 kg reflect a substantial structure, capable of transmitting high torque while maintaining rigidity and precision at work. It is certified Italian-made and the product complies with Machinery Directive 2006/42/EC with CE marking.
The socket extension is a rod with a square male drive at one end and a female drive at the other that extends the ratchet to reach nuts and screws in deep or awkward positions.
What it is for
Used for vehicle maintenance, in the workshop and on the road and for tightening nuts and bolts where torque must be accurate and repeatable.
How to use it
Fit it between the ratchet and a socket of the same drive size, checking that it is firmly seated. Turn as you would with the ratchet alone, keeping the rod in line with the nut. Those with a ball head or a swivel allow working at a certain angle. For heavy tightening, use only suitable extensions.
Where it is used
- Mechanical engineering industry
- Mechanical workshops
Technical data
- Connection: 3/4"
- Weight (kg): 1,38
- Dimensions (mm): 475 × 60 × 40
Who it is for
Designed for auto electricians and mechanics.
Related products
- Extension for socket wrenches Fervi PN403N050A
- Extension for socket wrenches Fervi PN402N200A
- Plastic sleeve for impact sockets Fervi 0341/S24 — from the category Impact Sockets
- Set of satin chrome combination spanners Fervi 0073 — from the category Combination Spanners
- Tool trolley mobile set 2 in 1 (1-93-968) Stanley — from the category Tool Trolleys
- Browse the whole category: Ratchet and Socket Sets
Before you order
In your request, please state the connection type and the quantities required, so we can give you the right quotation first time.
For prices and availability, request a quote from AMES Srl: we will reply with our quotation, delivery times and, where needed, an equivalent technical alternative.
Specifications 3
| Connection | 3/4" |
|---|---|
| Weight (kg) | 1,38 |
| Dimensions (mm) | 475 × 60 × 40 |
The perfect setup for this job
Everything you need in one place, from functionality to safety.
For the job
Tighten and loosen nuts and bolts when fitted to the ratchet, without damaging the corners.
Lubricate, free up and protect against rust when sprayed directly onto the part.
Transmit the driver's force to the screw, with the right profile for each head.
For safety
Protect hands from abrasion, dirt, liquids and minor cuts while keeping a firm grip.





