Description
Brass Brake Blanking Cap 7/16″ UNF x 20 Female
Solid brass female blanking cap with a 7/16″ x 20 UNF internal thread, to cap off a male 7/16″ UNF thread – hose end, male union or port – during repairs, storage or testing. Supplied by EMS Spares, Leicester.
Specification
| Thread | 7/16″ x 20 UNF female |
|---|---|
| Type | Female blanking cap |
| Hex / spanner size | N/A |
| Overall length | N/A |
| Material / finish | Solid brass, natural finish |
| Weight | 16.6g approx |
| Interchange reference | HU4AB* |
| EMS part number | EMS-A4AB |
* Reference numbers are for identification only. All dimensions are approximate.
Buyer’s guide: brake blanking caps explained
A blanking cap seals off a brake or clutch connection so fluid cannot escape and dirt cannot get in – for an unused port, to cap a pipe or hose while you work, or to pressure-test part of a circuit.
- Male blanking plug: thread on the outside – screws into a threaded port.
- Female blanking cap: thread on the inside – screws onto a male thread, such as a hose end or male union.
Identify your thread
| Thread | Outside diameter (male thread) | Threads | Typically found on |
|---|---|---|---|
| 3/8″ x 24 UNF | 9.5mm approx | 24 per inch | Most British classic car brake circuits on 3/16″ pipe |
| 7/16″ x 20 UNF | 11.1mm approx | 20 per inch | British classics, Land Rover, commercial vehicles – master cylinders, clutch and 1/4″ pipe circuits |
| M10 x 1mm | 10mm approx | 1mm pitch (about 25 per inch) | Most European and later cars |
| 3/8″ x 20 BSF | 9.5mm approx | 20 per inch | Older British cars (often pre-1960s) |
Tip: 3/8″ UNF and M10 x 1 look almost the same and will start to screw in, then bind. Never force a fitting. Measure the male thread diameter or use a thread gauge, or compare against your old part.
How to fit – good practice
- Check the thread before fitting – compare with your old part or use a thread gauge.
- Start every thread by hand for several turns – it should turn freely. If it binds, stop and check.
- Tighten with correctly sized split (flare nut) spanners. Brass is softer than steel – firm, not excessive.
- Bleed the system, then check every joint for leaks with the pedal pressed hard.
Safety: brakes and clutches are safety-critical systems. If you are not confident, have the work done or checked by a qualified mechanic.
Pack sizes
1 or 2 caps.
Delivery
Free UK delivery on every order (including Northern Ireland, Highlands & Islands). Same-day dispatch on orders placed before 10am.
Trusted by thousands of buyers on eBay
99.9% positive feedback from over 9,700 ratings, and 5.0 out of 5 for accurate description, postage cost, delivery time and communication (last 12 months). Read our eBay feedback.
FAQ
Will it fit 7/16″ x 24? No – this is 7/16″ x 20 UNF.
Need help? Message us with your vehicle.
Reviews
There are no reviews yet.