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The Silverline Monobloc Back Nut Tap Spanner 3-piece set features corrosion-resistant zinc-plated alloy steel construction, designed specifically for 9x11mm and 12x13mm fasteners. Its long reach enables easy access in restricted areas, making it an essential, lightweight tool (170g) for professional plumbing tasks.






















| ASIN | B0014BOAIW |
| Best Sellers Rank | 263,551 in DIY & Tools ( See Top 100 in DIY & Tools ) 96 in Box Spanners |
| Brand | Silverline |
| Colour | Silver |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,224) |
| Finish | Zinc-plated |
| Global Trade Identification Number | 05024763029806 |
| Head Style | Box End |
| Included Components | 1 x Monobloc back nut tap spanner 12/13mm, 1 x Monobloc back nut tap spanner 9/11mm |
| Item Length | 185 Millimetres |
| Item Package Quantity | 1 |
| Item Type Name | Silverline 719819 Monobloc Back Nut Tap Spanner, 9/11 and 12/13 mm |
| Item Weight | 0.17 Kilograms |
| Manufacturer | SLTL4 |
| Material | Zinc-plated Steel |
| Model Number | 719819 |
| Operation Mode | Mechanical |
| Unit Count | 1.0 count |
A**R
Do what they say.
Good and as described. Tightened up my sink tap easily. Good value for money.
P**K
Perfect!
For something so simple and so ridiculously cheap these are an absolute godsend. As many other people have said if you’re fitting a monobloc tap get some of these. Even if you’re not fitting a monobloc tap get a set of these and then you’ll have them when you need to change your taps. They make life so much easier than any other mechanism for getting to and tightening the 12mm nut that holds the tap on. They’re also about 180mm long which makes it much easier to do the job.
M**G
Does the job. Don't use the long lever to tighten. You'll ruin things.
I used a big nail instead of the leaver. The supplied lever just get in the way, and is so long that it invites ruining your threads.
J**F
Mixer tap box spanners
Fantastic spanners. My Mixer tap in the kitchen became loose and none of the spanners in my toolbox were of any use. In order to tighten the nut properly you need the box spanners as they fit snuggly over the nut. With four different sizes in the pack you are bound to get one that fits. Tightening the nut was simple. This product is value for money, chances are you may only use it once but for the price it costs it will save you a fortune not having to get a plumber in.
H**S
Cheap and effective tools
is your wobbly, badly anchored kitchen mixer tap annoying you? If you need to get down and dirty under the kitchen sink, you might well find these spanners a blessing - I certainly did, when I finally managed to tighten my pillar-type mixer tap nut with ease from below, a task I'd found impossible before I got these cheap but effective tools, whose good fit meant I was able to work by 'feel' since visibility was restricted. You can join them end-on, too, to get the benefit of more length where required. Recommended.
S**M
Good but not for Grohe taps.
These were one of the recommended items on Amazon from the page for a Grohe kitchen tap. Unfortunately I bought them and they don't have the size needed for the tap so I had to purchase a larger size. That aside, the product itself is good and easy to use. It's preferable to a tap spanner in very confined spaces and the centres are hollow to allow for long securing nuts on taps.
C**N
Believe me, you must go on Trust, for Plumb jobs these are - an absolute Must!
Brilliant value and Quality very long reach, Box Spanners, which are essential if you are working on fitting single pillar, mixer type. water taps. These tools make the job of tightening the inaccessible single fixing nut, for these Taps, a breeze. Try it any other way and you'll be pulling your hair out! Really though, I think Plumbing designers deliberately make a bad design, to keep trdesmen in work. Highly recommended as extremely invaluable, though little used, addition, to the serious DIYer's Tool Kit.
M**M
Box spanner size and modification
Unfortunately there is no 10mm.box spanner.No mention of the sizes is made in the description. The sizes are-9mm. 11mm. 12mm. and 13mm. The price and delivery time is very good.Also the Amazon packaging is first class. The quality isn't that great,but reasonable,considering the price. Should you have access to a metal vice the 9mm. can be enlarged to 10mm.by partially filing the inside flats of the spanner then hammering the spanner over a tapered 6mm (10mm.head) bolt clamped in the vice. A cheap way out if you need the 10mm.instead of the 9mm. Buying a 10 mm.box spanner seems quite hard for less the £4.
A**2
OTTIMI, FUNZIONALE
A**W
Konnte damit problemlos unsere Waschtischarmaturen tauschen, genau dafür habe ich es gekauft, Preis/Leistung gut, war sehr zufrieden.
G**9
Bon produit
J**P
Fixer par le dessous un mitigeur de cuisine; la finition des clefs est imparfaite; il faut ébarber les trous pour que le levier s'y introduise mais la longueur des clefs est correcte et le rapport qualité prix est bon
D**.
Reseña para el modelo Silverline 719819 - Llave de tubo para contratuerca de monobloque 9/11 & 12/13 mm La compré ya que necesitaba desmontar un grifo del lavabo y los tornillos del tipo alargados impedían el acceso con otro tipo de llaves. Son perfectas para llegar donde una llave inglesa normal no llegaría por el espacio tan comprimido que hay. Os dejo unas fotos donde podéis ver a qué tornillos me refiero, al lado de los latigullos de entrada de agua. Gracias a esta llave podréis acceder fácilmente así que cumple con su cometido perfectamente. El fabricante da una garantía de por vida. Espero que os parezcan útiles las fotos.
Trustpilot
2 weeks ago
2 weeks ago