Basic Definition of 70mm Base Formwork Clamp
70mm base formwork clamp, with the standard industry name D15 Twin Jaw Wall Fastener, also called forged two claw form anchor, is a special clamping fitting matched with D15 trapezoidal thread water stop tie rod. Different from ordinary butterfly nuts without supporting plate, this fitting is equipped with an integrated 70mm diameter round base, 115mm span between two claws and fixed 15mm inner thread hole. It adopts one-piece 45# steel forging instead of casting, designed to disperse concrete lateral pressure during pouring.
Specification
Standard Product Dimensions Explained
Product Name
D15 Twin Jaw Wall Fastener
Thread Size
D15 Trapezoidal Thread
Inner Hole Diameter
15mm
Distance Between Two Jaws
115mm
Round Base Diameter
70mm
Material
45# Carbon Steel
Production Process
Integral Hot Forging
Surface Treatment
Electro Galvanized
Matching Accessory
D15 Water Stop Tie Rod
Application
Concrete Wall Formwork System
Every size of D15 Twin Jaw Wall Fastener has a targeted function for construction:
Inner thread hole 15mm
Exclusive matching size for D15 trapezoidal tie rod, tight thread fit avoids slipping when vibrating concrete.
115mm distance between two claws
Widened thickened claw space reserves operating space for hammer knocking, greatly improving disassembly efficiency.
70mm round base plate
Enlarged bearing surface evenly distributes wall pressure, prevents formwork indentation and slurry leakage.
Integrated forging body
No casting pores inside, strong impact resistance for repeated turnover.
This round base tie rod clamp adopts 45# carbon steel hot integral forging craft.
Disadvantages of casted butterfly nuts
Loose internal structure with tiny air holes.
Easy to crack under heavy load or vibration.
Short service life, only reusable 15–25 times.
Advantages of forged two claw anchor
Dense metal structure, high tensile strength.
Anti-crack, anti-deformation for basement and high-rise walls.
Service life over 50 times with regular cleaning.
Surface treatment is uniform electro-galvanized coating, which isolates steel from air and moisture, adapting to humid underground construction and long sea transportation.
Step-by-Step Installation Tutorial
Pass D15 water stop tie rod through steel or wood formwork panels and back ribs.
Put the round base of the fastener closely against the back rib surface. Ensure the whole base fits flat without tilting.
Knock the two thick claws with a hammer to rotate the clamp inward, tighten the formwork until no gap exists between panels.
After concrete solidification, reversely knock the claws to loosen the fastener, then take it down for cyclic use.
Main Application Scenarios
This forged two claw form anchor is widely used in all construction projects with D15 tie rod system:
High-rise residential shear walls Underground basement & parking lot structures
Bridge piers and abutment formwork
Elevator shafts, small tunnel side walls
high quality
Advanced Equipment
Professional Team
One-Stop Solution
Daily Maintenance Tips For Longer Service Life
Clean Residues
Remove concrete residue on thread and base after disassembly; cement blockage will cause sliding next time.
Dry Storage
Store fasteners in dry, ventilated warehouse, avoid rain and seawater splashing to protect galvanized layer.
Sort Defects
Sort out deformed, cracked products in time to prevent construction safety risks.
Gentle Knocking
Do not violently hammer the base plate to avoid bending the bearing disc.
FAQ
Q: Q1: Can this 70mm base formwork clamp match D17 tie rod?
A: No. Its inner thread hole is fixed 15mm, only compatible with D15 trapezoidal tie rod.
A: Q2: What's the core difference between this fastener and common butterfly nut?
A: Ordinary butterfly nuts have no supporting base. Under concrete pressure, they sink into formwork easily, causing slurry leakage and damaged panels. The 70mm wide base of our fastener shares pressure evenly to protect formwork.
Q3: How many times can this forged fastener be reused?
A: With proper cleaning and storage, it can be reused more than 50 times, far more than casted butterfly nuts.
Q4: Is electro-galvanized finish enough for coastal construction sites?
A: Standard electro-galvanized layer meets general coastal and underground projects. For strong salt fog environments, customized color galvanized treatment is available.
If you finish learning the product information and want to get bulk supply, free samples and factory quotation, click to view our wholesale product page.
Hot Tags: d15 twin jaw wall fastener, China d15 twin jaw wall fastener manufacturers, suppliers, factory, Forged Combi Anchor Nut, formwork accessory, Formwork Panel Clamp, Formwork Spring Clamp, Rasto Type Corner Formwork Clamp, Rectangle Combi Anchor Nut
