Custom-Made Stainless Steel Fasteners

Product Introduction

Stainless steel blind hole nut M4 is made of 304/316 stainless steel. It has corrosion resistance and high strength characteristics, and is suitable for occasions where hidden installation is required. The M4 specification (nominal diameter 4mm) is designed as a blind hole structure with a closed bottom to prevent liquid infiltration or thread exposure and improve sealing. The surface can be polished or passivated to enhance aesthetics and rust prevention. The working temperature range is -60℃~400℃, and it is widely used in connection scenarios such as electronic equipment, medical devices, and automotive parts that require high rust and concealment.

Features

1. 304/316 stainless steel is selected, which has excellent corrosion resistance (passed the 48-hour salt spray test) and mechanical strength (304 stainless steel tensile strength ≥500MPa).

2. Blind hole structure (bottom seal) effectively prevents dust and liquid from entering the threaded hole, improves stain resistance and sealing, and is suitable for clean environments.

3. M4 metric fine threads comply with ISO standards, with a matching accuracy of 6H to ensure smooth installation and fastening reliability.

4. Optional polishing, passivation or sandblasting treatment, taking into account both aesthetics and functionality (for example, the 316 material can be additionally electrolytically polished to improve chemical corrosion resistance).

5. The working temperature range is -60℃~400℃ (316 stainless steel has better high temperature resistance), meeting most stringent environmental needs.

6. Some models can be matched with nylon inserts or serrated flange surfaces to enhance the anti-vibration and looseness (vibration tests up to 3,000 times without looseness).

Product Application

1. Electronic and precision instruments: PCB circuit board fixation, sensor housing, optical equipment components, blind hole structure prevents dust and liquid from intrusion, 304/316 stainless steel resists electromagnetic interference, and is suitable for clean environments.

2. Medical and food equipment: surgical instruments, pharmaceutical machinery, food processing equipment, comply with FDA standards, passivation/electrolytic polishing surface treatment, chemical corrosion resistance, and avoid pollution.

3. Automobile and new energy: battery pack bracket, motor housing, car electronics, lightweight (65% weight loss compared to steel nuts), anti-vibration and anti-loose design (flange surface or nylon insert).

4. Marine and outdoor equipment: marine components, seawater treatment equipment, communication base station waterproof tank, 316L material is resistant to salt spray corrosion, IP68 protection level (with sealing ring).

5. Industrial machinery and cabinets: chassis spacing, sheet metal fastening, automation equipment frame, easy to install by pressing or riveting, suitable for 0.5-6mm thin plates, replacing welding nuts.

Product Advantages

1. Excellent sealing protection performance: blind hole closed design, effectively blocking the intrusion of water vapor, dust and corrosive media. It passes IP68 level waterproof test (when paired with sealing ring), especially suitable for outdoor and humid environments

2. Military-grade corrosion resistance: 316L material can withstand 2000 hours of neutral salt spray test, excellent acid and alkali resistance (no corrosion within the pH 2-12 range) electrolytic polishing treatment makes the surface roughness ≤0.2μm, preventing bacterial growth

3. High-precision and reliable connection: thread accuracy reaches 6H level, matching tolerance is controlled at ±0.02mm, special cold forging process ensures thread tensile strength ≥500MPa anti-slip tooth design allows vibration test to pass more than 5,000 times

4. Intelligent installation adaptation: supports automatic rivet/riveting process, and improves installation efficiency by 300% head laser marking to achieve full process quality traceability. Optional magnetic processing version is easy for robot grabbing and positioning.

5. Ultra-wide environmental adaptability: The operating temperature range is extended to -200℃~800℃ (short term) and passed NASA low-release certification, suitable for vacuum environments, and complies with the RoHS/REACH environmental protection directive.

6. Full life cycle cost advantage: service life is 5-8 times longer than ordinary nuts, maintenance-free design reduces after-sales cost by 90% 100% recyclable, green and environmentally friendly

FAQ

Q1: What is a blind hole nut? How is it different from a regular nut?

A1: The bottom of the blind hole nut is closed to prevent liquid and dust from entering the threaded hole. It is suitable for scenes where sealing or concealed installation is required.

Q2: Can blind hole nuts be prevented from loosening? What are the anti-loosening solutions?

A2: Optional nylon insert, serrated flange or double thread design, with better vibration resistance (passed 5000 vibration tests).

Q3: Does it support customized production?

A3: Supports customized materials (316L, titanium alloy, etc.), surface treatment, anti-loose structure and special sizes.

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