Combination Nut (Butterfly)
Butterfly nut combined with disc for one-piece tie rod fastening.
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1 / 3Tie Rod Matching Nuts
Combination Nut (Butterfly)
A butterfly nut combined with an integrated disc, giving a one-piece fastener for tie rods. Fewer parts on site and faster assembly than separate nut and washer.
Specifications
- One-piece nut and disc
- Butterfly hand tightening
- Fits D15 / D20 threads
- Reduces parts count
Prices are quoted based on product specifications, material/grade, quantity, destination and current market conditions. Contact us for the latest quotation.
Engineering-reviewed quote within 24 hours.
Technical Specifications
| Thread | D15 / D20 |
| Material | 45# steel / cast |
| Surface | Zinc plated / black |
Material45# steel / cast
Surface FinishZinc plated · Black
Rated LoadInquire
Unit WeightInquire
PackagingCartons on pallet
Production Process
01
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06Material Grades Explained
| Grade | Notes |
|---|---|
| Q235 | Plain carbon steel. Economic option for light and medium formwork loads. Not heat treated. |
| 45# | Medium carbon steel. The standard formwork tie rod grade in China; quenchable to class 8.8. |
| 40Cr | Alloy steel. Higher hardenability and better fatigue performance than 45#; used where repeated reuse matters. |
| Class 10.9 bolt | Quenched and tempered alloy steel bolt used in the climbing cone set. Not electroplated without a documented baking cycle. |
| QT450-10 | Ductile (nodular) iron with 450 MPa tensile and 10% elongation. Used for sleeves and embedded plates where toughness and castability matter. |
| HRB400 | Hot-rolled ribbed bar (threaded steel) to Chinese standard. Used for embedded foot bolts; good bond with concrete. |
Applications
Procurement Guide
- Confirm thread size
- Order to reduce on-site parts
Procurement Information
- OEM / Custom
- Own drawing or label welcome
- MOQ
- Trial orders OK · mixed SKU welcome
- Lead time
- Stock 3d · Custom 7-15d
- Packaging
- Seaworthy: pallet + strapping + waterproof
- Payment
- T/T · L/C at sight
- Incoterms
- FOB Tianjin · CIF · CFR · EXW
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Technical FAQ
Combination Nut (Butterfly) — Answers for Engineers and Buyers
Tie spacing is governed by the maximum lateral pressure of fresh concrete, which depends on pour rate, concrete temperature, slump and wall height, plus the allowable load of the rod, the waler and the panel facing. Spacing must be calculated per pour, not copied from a previous project.