Wanluo’s China Cross Recessed Three-In-One Assembly Screw are integrated three-in-one fasteners consisting of pan head machine screw, flat washer and spring washer, pre-assembled into one complete piece for one-step installation. Different from loose single screws and separate accessory assembly fasteners, this combined screw adopts integrated forming and automatic assembly technology, eliminating the trouble of manual matching gaskets.
Equipped with standard cross recess drive, smooth rounded pan head and precise standard machine thread, the Cross Recessed Three-In-One Assembly Screw by Wanluo factory features accurate tooth pitch, firm locking and anti-loosening performance. It is widely used for electrical equipment, household appliances, hardware accessories, furniture connection and mechanical shell fixing, being the most versatile standard assembly fastener for batch industrial installation.
Standardized Cold Heading Forming & Fine Thread Finishing Technology
This Cross Recessed Three-In-One Assembly Screw is manufactured via professional cold heading integral forming process, with dense internal metal structure, high hardness and strong toughness. The smooth pan head is precisely stamped and formed with no burrs, ensuring flat and neat fitting after installation. The cross recess is deep and standard with high torque resistance, effectively avoiding slipping and tooth damage during screwing. The thread is rolled by high-precision die, with uniform tooth shape, accurate tolerance and smooth locking. The matched flat washer provides uniform compression force, while the spring washer plays an excellent anti-loosening and anti-vibration role. All products undergo strict hardness testing and layer inspection, with electro-galvanized, color zinc and black surface treatments available for superior anti-rust and anti-corrosion performance, adapting to long-term indoor and light industrial working environments.
Product Parameter
Parameter Item
Detailed Specification
Product Name
Pan Head Combination Screw, Cross Recessed Three-In-One Screw, Machine Screw with Flat & Spring Washer, Integrated Assembly Fastener
Executive Standard
GB, DIN, ISO, ANSI Industrial Fastener Standard
Available Material
High-Quality Carbon Steel, 304 Stainless Steel
Size Range
M2/M2.5/M3/M4/M5/M6/M8 full standard sizes, complete length options, support non-standard customization
Head Type
Round Pan Head / Cross Recessed Head
Combination Structure
Screw + Flat Washer + Spring Washer 3-in-1 Integrated Assembly
Surface Treatment
Electro Galvanizing, Color Zinc Plating, Black Oxidation, Passivation Anti-Rust
Thread Type
Standard Precision Machine Thread
Core Feature
One-piece combination, anti-loosening, labor-saving installation, high assembly efficiency
1. All-in-one integrated structure saves assembly cost. The Cross Recessed Three-In-One Assembly Screw, flat washer and spring washer are pre-assembled in factory, no need for manual sorting and matching during on-site construction, greatly improving installation efficiency and solving the problem of easy loss of scattered gaskets.
2. Dual anti-loosening protection performance. Equipped with elastic spring washer and flat pressure washer, it can effectively absorb vibration and buffer pressure during equipment operation, preventing thread loosening and falling off caused by long-term mechanical vibration, ensuring stable connection for a long time.
3. Precise standard thread & strong compatibility. Adopting international standard machine thread, the tooth shape is neat and the tolerance is precise, which can perfectly match standard threaded holes of hardware, electronics and machinery, with smooth locking and no sliding teeth.
4. Neat and beautiful installation effect. The round pan head fits closely with the mounting surface, with smooth and flat appearance after installation, no protruding sharp edges, which meets the appearance and safety requirements of household appliances and civilian equipment.
5. Stable batch quality & wide applicability. Mature cold heading production process ensures consistent product hardness and size in batches. It is suitable for large-scale assembly lines of electronic factories, furniture factories and electrical equipment manufacturers, with high cost performance and stable supply capacity.
FAQ
Q1: What is the advantage of three-in-one combination screws over ordinary machine screws?
A1: Combination screws come with gaskets integrated, no manual assembly required, with built-in anti-loosening spring washer. They feature higher installation efficiency and better vibration resistance, which ordinary single screws do not have.
Q2: Are the combination gaskets easy to fall off?
A2: We adopt professional pressure assembly process, the gaskets are tightly clamped on the screw body without loosening or falling off during transportation and installation, ensuring product integrity.
Q3: Can this screw be used for electronic and electrical equipment?
A3: Yes. The surface is smooth and burr-free, with stable anti-rust performance and moderate fastening force. It is the standard matching fastener for electronic shells, electrical accessories and precision equipment assembly.
Q4: Support customized specifications and special colors?
A4: Yes. We support customized screw length, thread specification, gasket thickness and electroplating color, and provide laser logo marking services for brand customization.
Q5: Is the batch delivery stable?
A5: We have complete automated assembly production lines, sufficient raw material inventory and perfect quality inspection system, which can meet long-term large-batch order delivery requirements of industrial customers.
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