Mon - Fri (24 hours)

STEP files download

Technical expertise

<p>Mon-Fri (24 hours)</p>

Mon-Fri (24 hours)

Read More
<p>STEP files download</p>

STEP files download

Read More
<p>Technical expertise</p>

Technical expertise

Read More
Euro € ^

Metric vented lock washer, M4


Out of stock

Expected delivery time: 3 - 4 weeks

Delivery to all countries

Free shipping on orders > € 250,-

Easy credit card payments

Pay safe with:

Datasheet download
Weight 0,001000 kg

HS code

7318 2100


United States


Thread style

Expected delivery time


The incorporation of vented split-washers in a vacuum environment is crucial. In a non-vented, blind-threaded hole, a gas pocket forms, making evacuation challenging or impossible without an escape path.

Our vented spring-lock washers, featuring one open end, facilitate ventilation, locking securely when tightened. This ensures a rapid pump-down process, eliminating the inconvenience caused by the small gas leaks associated with regular washers.


Material:                             A2-70

Thread style:                      M2 – M24

Minimum Order Quantity = 25 pieces per size

Receive product sheets

Already a customer of Demaco Holland B.V.? You already have access to the linked files but feel free to submit a new request.