Vacuum Cap 4mm Black
4 mm black vacuum cap for sealing vacuum ports and small takeoff nipples. Useful when you need to close an unused vacuum/pressure point to keep the system airtight.
Net price: 1 €
Key Features & Benefits – 4 mm vacuum cap black
The 4 mm vacuum cap black is a compact sealing cap designed to fit 4 mm vacuum nipples/ports. It is a simple way to cap an unused takeoff point in vacuum or pressure signal hose routing, and this vacuum cap (vacuum plug) keeps the layout tidy.
Sealing the unused port helps prevent leaks that can lead to unstable signals or inconsistent operation. The black finish stays discreet in the engine bay and matches mixed hose setups.
When is this useful?
It is useful during modifications, testing, or after removing an accessory when a spare vacuum nipple must be closed off. A properly sealed branch helps avoid false air and keeps pressure/vacuum references stable.
Technical specs
- Type: Vacuum cap
- Size: 4 mm
- Color: Black
- Product code: MG-RD-100
Selection & installation tips
- Size check: measure the outer diameter of the nipple you want to seal and match it to the 4 mm size.
- Surface prep: clean oil and dirt from the nipple so the cap seats evenly.
- Avoid stressed bends: do not place it on the tightest bend radius or a section that is under tension, as deformation can reduce sealing.
- Retention check: in high-vibration areas, confirm it stays fully seated; add extra retention if needed.
- Heat & rubbing: keep clearance to hot or moving parts and avoid contact with sharp edges.
Before installation, verify the actual nipple diameter, surrounding clearance and hose routing, then compare them to the specs above. This helps keep the fit and sealing performance of the 4 mm vacuum cap black predictable in your setup.
Net price: 1 €
