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Knurled Captive Screws A2 Combo Phillips/Slotted Server Rack & Enclosure
Product Details:
| Place of Origin: | China |
| Brand Name: | guanbiao |
| Certification: | ISO9001 |
| Model Number: | M5*20 |
Payment & Shipping Terms:
| Minimum Order Quantity: | 50000 |
|---|---|
| Price: | Negotiable |
| Packaging Details: | Plastic bag + carton + pallet |
| Delivery Time: | 15-20 work days |
| Payment Terms: | T/T |
| Supply Ability: | 5000000 |
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Detail Information |
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| Process: | Cold Forging | Usage: | For Fastening Metal To Metal |
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| Tooth Type: | Machine Thread | Single: | 1g/pcs |
| Specification: | Thread:M0.6-M16 | Length: | Various Lengths Available |
| Shape: | Rounded Head | Thread Diameter: | Standard |
| Head Diameter: | 7.5mm | Head: | Unique Cylindrical Head |
| Size: | Non-standard | Tooth Diameter: | M5 |
| Surface Finishing: | Passivated | Drive Type: | Phillips/Slotted Combination |
Product Description
Knurled Captive Screws A2 Combo Phillips/Slotted Server Rack & Enclosure
Secure access panels easily with our knurled captive screws. Cylindrical head, combo drive, captive washer. A2 stainless steel. EMI grounding. For servers, telecom & industrial enclosures. View sizes.
Streamline maintenance and ensure reliable grounding with our **Knurled Captive Panel Screws**. Designed for industrial electronics and server racks, these screws feature a **unique cylindrical head** with the **upper portion knurled for easy tightening/loosening** and a **smooth lower portion** for a clean finish against panels. The **Phillips/Slotted combination drive** provides tool flexibility for initial installation or high-torque needs. Integrated with a **captive flat washer** and **captive spring washer** (or captive wave washer), they remain securely attached to the panel when loosened, preventing loss. Made from A2 (304) stainless steel with passivation for corrosion resistance and excellent EMI/RF shielding continuity.
TECHNICAL SPECIFICATIONS |
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| Material | A2-70 Stainless Steel (304) (ISO 3506) |
| Drive Type | Phillips/Slotted Combination** (Typically PH2 Phillips + 3-4mm Slotted). |
| Head Style | Cylindrical Head (Smooth lower shank, **Knurled upper grip section** - Diamond knurl pattern common) |
| Sizes (Diameter x Length): | Common: * M4 x 8mm, 10mm, 12mm, 16mm (Knurl Dia: ~6-7mm) * M5 x 10mm, 12mm, 16mm, 20mm (Knurl Dia: ~7-8mm) * M6 x 12mm, 16mm, 20mm, 25mm (Knurl Dia: ~9-10mm) |
| Surface Finish | Passivated (Standard). |
| Standards | Functional design, material to ISO 3506. |
Primary Uses & Applications:
* Server rack & data center equipment access panels.
* Industrial control cabinet doors & covers.
* Telecommunications enclosures & base stations.
* Test & measurement equipment housings.
* Medical device access ports.
* Aviation electronics (avionics) panels.
* Any application requiring frequent, tool-less access with secure screw retention and EMI grounding.
Surface Treatment/Finishes:
* **Passivation (Standard):** Critical for maximizing corrosion resistance by removing free iron and enhancing the passive chromium oxide layer. Maintains conductivity.
* **Optional: Electropolishing:** Provides a smoother, brighter finish, enhances corrosion resistance slightly, and improves cleanability/decontamination.
How to Use:
1. **Panel Preparation:** Install a **captive screw receptacle** (threaded standoff, PEM nut, or rivet nut) into the panel frame at the required locations. Ensure conductivity if grounding is needed.
2. **Insert Screw Assembly:** Insert the **captive screw assembly** (screw + captive washers) through the hole in the access panel door/cover.
3. **Initial Tightening (Tool):** Use a **Phillips (PH2) screwdriver** or **flat blade screwdriver** to initially tighten the screw into the receptacle. Apply sufficient torque for security and grounding contact.
4. **Tool-Less Operation:** For subsequent opening/closing, simply **grip the knurled upper section** of the screw head and rotate by hand to loosen or tighten. The captive washers keep the screw assembly attached to the panel.
5. **Grounding:** The captive flat washer ensures consistent metal-to-metal contact between the panel and the frame/receptacle, creating a reliable EMI/RF shielding path.