
Tuerca de disco
Tuercas de mariposa/disco para varillas, rosca DIN, alta resistencia.
- Tirantes D12 / D15 / D20
- Capacidad de apoyo nominal ~180 kN
- Cara mecanizada plana
Tuercas de disco, de disco con dos pestañas, de mariposa (montaña), hidrófugas, combinadas y de unión — guía de rosca y compatibilidad.
La tuerca es donde se retiene realmente la carga del tirante. Esta serie cubre las tuercas de disco que reparten la presión del hormigón, las de mariposa que se aprietan a mano, la tuerca hidrófuga para muros estancos y las tuercas combinadas y de unión. Compruebe la rosca y el paso con la varilla antes de pedir.

Tuercas de mariposa/disco para varillas, rosca DIN, alta resistencia.

Tuerca de montaña tipo mariposa para el apriete manual de tirantes de encofrado.

Tuerca de disco con dos pestañas para apriete manual y montaje rápido del tirante.

Tuerca de fundición con hidrófugo para sistemas de tirante estancos.

Disco estampado de montaña: reparte la carga del tirante sobre largueros y paneles.

Tuerca de mariposa integrada con disco para apretar el tirante en una sola pieza.
The nut is where the tie load is actually held, and the type follows the face it bears on. Disc nuts spread the load across a flat machined face and are the default on wall and slab formwork; the double-lug version adds hand leverage for tight joints; wing and mountain nuts tighten by hand without a spanner on high-turnover panels; the combination nut fuses nut and disc into one part to cut the number of pieces a crew handles; connecting nuts join two rod sections for deep walls or long runs; and the cast-iron water stop nut sits inside a water-retaining wall so the tie hole cannot become a seepage path.
Thread mismatch is the most common ordering error, so match before anything else: a D15/17 rod takes a 17 mm across-flats nut on a 15 mm rod thread, and a D20/22 rod takes a 22 mm nut. Disc nuts carry roughly 180 kN rated bearing on a flat face and pair with a square base plate where the concrete surface is uneven or the timber is soft. For watertight walls the water stop nut replaces the standard nut without changing tie spacing, and the tie is cut back after stripping. In high-vibration or repeatedly re-used systems a plum washer behind the nut resists loosening. All nuts are QT450-10 ductile iron or forged steel, and we supply them with the rods so the pairing is verified before dispatch.
Nuts and rods are quoted as a set: buyers who order rods first and nuts later routinely end up with a thread mismatch from a different supplier. Standard D15/17 and D20/22 nuts are held in stock and ship in about three days; cast or forged specials and non-standard plate sizes take 7–15 days. Ductile iron parts are packed in bags then on pallets to keep threads clean in transit, with ton-bag or carton options for mixed container loads. Certification to ISO 9001:2015 covers each batch, and dimensional reports are available for incoming inspection.
Un tirante de encofrado es una barra roscada de alta resistencia que, junto con tuercas, placas de anclaje y largueros, mantiene los paneles de encofrado frente a la presión lateral del hormigón fresco. Atraviesa la sección del muro y se recupera por completo tras el desencofrado (tirante pasante usado con manguito) o queda empotrado de forma permanente (tipo de extremo perdido / hidrófugo).