316 Stainless Steel Knurled Captive Screws Combo Drive for Medical Equipment

Knurled Captive Screws A2 Combo Phillips/Slotted Server Rack & Enclosure

Premium A4-70 knurled captive screws for corrosive/clean environments. Combo drive, captive design. Passivated or electropolished. For medical devices, lab & food processing equipment. Hygienic.

Meet the demanding hygiene and corrosion resistance requirements of medical, laboratory, and food processing equipment with our **A4 Stainless Steel Knurled Captive Screws**. Crafted from A4-70 (316) stainless steel, they offer **superior resistance** to salt water, chemicals, acids, and frequent cleaning agents. The **partially knurled cylindrical head** enables easy, frequent access, while the **smooth lower section** minimizes crevices for easy cleaning. The **Phillips/Slotted combo drive** ensures secure installation. The **captive washer system** prevents screw loss, critical in sterile environments. Available passivated or electropolished for maximum smoothness and cleanability.

Primary Uses & Applications:

* Medical device housings & access panels.
* Laboratory equipment & analyzers.
* Pharmaceutical processing & packaging machinery.
* Food & beverage processing equipment.
* Biotech & cleanroom instrumentation.
* Marine scientific equipment.
* Chemical handling systems.
* Any application requiring frequent access, high corrosion resistance, and easy cleaning/sanitization.

Surface Treatment/Finishes:
* **Passivation (Standard):** Mandatory for corrosion resistance. Removes free iron.
* **Electropolishing (Highly Recommended):** Significantly smoothes surfaces (Ra < 0.4 µm), removes micro-imperfections, enhances corrosion resistance, improves cleanability, reduces bacterial adhesion, and provides a bright, easy-to-inspect finish. Compliant with FDA, USDA, 3-A Sanitary Standards for hygienic applications.

How to Use:

1. **Panel Prep:** Install **A4 stainless steel captive receptacles** (threaded inserts/standoffs) into the frame. Ensure material compatibility.
2. **Insert Assembly:** Insert the captive screw assembly through the panel hole.
3. **Installation (Tool):** Use a **clean PH2 or slotted driver** to tighten the screw securely. Achieve metal-to-metal contact for grounding if needed. *Follow sanitized handling procedures.*
4. **Tool-Less Access:** For routine access, **hand-tighten/loosen using the knurled grip**. The captive design prevents screws from falling into sensitive areas.
5. **Cleaning:** The smooth surfaces (especially electropolished) and minimized crevices allow for effective cleaning, wiping, spraying, or autoclaving (check EP specs). No threads are exposed when tightened.
6. **Inspection:** The bright EP finish allows easy visual inspection for damage or contamination.

Dongguan Guanbiao Hardware Products Co., Ltd., established in 2013, is a screw hardware processing factory integrating R & D, production and sales, focusing on electronic and electrical appliances, computer radiator, communication equipment, lighting, motor, motor, medical equipment, sports equipment, auto parts, baby stroller accessories and other industries. Its main products include all kinds of iron, stainless steel, copper, aluminum and alloy Precision small screws, spring screws, loose screws, stainless steel screws, step screws, plum blossom screws, slender screws, anti-theft screws, non-standard customized screws, stainless steel rivets, shafts, pins, CNC parts and stamping parts. The first mock exam the second mock exam is two punch, two die four punch, three die six punch, four die four punch, six die six punch, die closing machine, part forming machine, automatic lathe, CNC lathe and so on, and the diameter is 1mm-20mm, the length is 1mm-300mm.

The company introduced imported automation equipment, combined with mature technology and precision equipment, to ensure product quality, control quality from the source, and adhere to technological innovation.

Our business philosophy is "integrity, innovation, efficiency, win-win", your satisfaction is our eternal pursuit, looking forward to become your sincere partner!    wechat:+8613423026460