Custom-Made Special-Shaped Screws

Product Introduction

The 304 stainless steel small square screw is made of high-quality A2-70 stainless steel, with excellent corrosion resistance and oxidation resistance, and is suitable for moisture, acid and alkaline environments. Its unique square head design facilitates the tightening of tools (such as wrenches, sleeves), providing higher torque transfer efficiency and preventing slippage. Standard specifications cover M2-M8, length 5-50mm can be customized, the surface can be polished or passivated, and it has both aesthetics and anti-rust properties. Widely used in the assembly of electronic equipment, furniture hardware, medical devices and precision instruments, it is an efficient anti-loosening solution that replaces traditional hexagonal screws.

Features

1. Adopt A2-70 grade 304 stainless steel, tensile strength ≥700MPa, hardness HRB80-90, excellent oxidation resistance, passed 48-hour salt spray test, suitable for humid, acid and alkaline environment

2. Unique square head structure, which has a 30% increase in torque transmission efficiency compared to the hexagon head, effectively preventing tool slippage, and supports the installation of various tools such as wrench, sleeve, and special square head.

3. Standard specifications M2-M8 (metric), length 5-50mm can be customized, tolerance level 6g (ISO standard), ensuring accurate thread matching

4. Electrolytic polishing: surface roughness ≤0.3μm, beautiful anti-fingerprint, passivation treatment: enhance corrosion resistance and extend service life

5. Multi-functional and applicable scenarios, electronic equipment: PCB board fixing, chassis assembly, furniture and hardware: concealed installation, anti-tamping design

Medical devices: FDA-compliant, non-toxic and resistant to disinfection

6. Optimized depth of four-sided head groove, compatible with mainstream tools on the market

Product Application

1. Electronic and electrical industry: PCB board fixing: used for anti-loose connection between the circuit board and the shell, the square head design avoids tool slippage and damage to precision components, instrument assembly: Provide reliable tightening in oscilloscopes, test equipment and other parts that require frequent inspection.

Power supply equipment: The switching power supply and the heat sink of the inverter are fixed, resistant to high temperature and rust.

2. Mechanical equipment manufacturing: Small motor installation: The end cover of the servo motor is tightened, and it is not loose due to high-frequency vibration. Automation equipment: the joints of the robotic arm are connected, the four-sided heads are convenient for operation in narrow spaces. Pipe flange: instrument pipe fittings are quickly disassembled and assembled, replacing traditional hexagon bolts

3. Medical device field: Medical equipment shell: Comply with FDA certification, used in sterile environments such as CT machines and ventilators, surgical instruments: Resistant to repeated high temperature disinfection (134℃ steam sterilization) Bed adjustment mechanism: Concealed installation to prevent patients from touching by mistake

4. Furniture and building decoration: high-end furniture assembly: concealed and fastened cabinet hinges and drawer guide rails, bathroom hardware: shower room and towel rack installation, anti-moisture corrosion, decorative building materials: aluminum panel curtain wall joints fixed, flat and beautiful surface

5. Transportation tools: Car interior: Center console, seat adjustment components installed, rail transit: Fixed cabin lighting equipment, passing vibration test

Product Advantages

1. The original 12° side inclination design achieves torque transmission efficiency 40% higher than traditional hexagon heads, patented technology for anti-slip traces (patent number CN2023XXXXXX), and maintains clamping force above 90% in oily environments

2. Super strong 304 stainless steel, using Baosteel's special BA-grade cold rolled material, nickel content 8.5-10.5% (1.5% higher than the national standard) carbon content ≤0.07% (enhanced welding performance)

3. High temperature version: temperature resistance up to 650℃ (regular 400℃) Anti-magnetic version: magnetic permeability <1.005 (special for medical equipment) Food grade: passed FDA 21CFR certification

4. The three major advantages of anti-slip, corrosion resistance and space saving are especially suitable for occasions where precision adjustment or frequent maintenance are required. They are the preferred solution for engineers to replace traditional fasteners.

FAQ

Q1: What is the essential difference between a square head and a traditional hexagon head?

A1: The contact surface of the four-sided head is increased by 25%, the stress distribution is more uniform, and the torque transmission efficiency is improved by 40% (actually measured value: M4 screws reach 5N·m without slippage)

Q2: How to choose a special environment?

A2: Low temperature environment: -196℃ special type (austenite stable treatment) Chemical environment: 316L material customized (acid-resistant upgraded version) Sterile environment: electrolytic polishing + γ-ray sterilization pretreatment

Q3: How to prevent loosening in vibrating environments?

A3: Basic type: Elastic washer (vibration <5G) Enhanced type: Double nut (vibration <10G) Professional type: Thread glue (vibration <20G)

Special-Shaped Screws

Stainless Steel Special-Shaped Screws