304 Stainless Steel Pan Head Phillips Machine Screws with Nut & Washer Kits
DISLAB Precision — high-quality, corrosion‑resistant fastener sets designed for versatile assembly applications. Manufactured from premium 304 stainless steel (strength rating 6.8, full thread, GB818 standard), these complete kits include matching nuts, flat washers, and spring washers for a secure, vibration‑resistant fit. Available in thread diameters from M2 to M10 and lengths 25mm up to 200mm.
Ideal for communication equipment, new energy battery manufacturing, electronic assembly, and general industrial projects. Polished finish and precision‑machined threads ensure consistent performance and long‑term durability.
Core Product Advantages
📦 Complete Kit Convenience
Each set includes screw, nut, flat washer, and spring washer — eliminating separate sourcing. Saves assembly time and ensures perfect compatibility.
🛡️ Corrosion‑Resistant 304 SS
Premium 304 stainless steel with passivated finish resists rust and corrosion, suitable for indoor/outdoor and humid environments.
⚙️ Vibration‑Resistant Locking
Integrated spring washer provides a locking effect, preventing loosening under vibration or repeated loads — critical for dynamic machinery.
🔩 Precision‑Machined Threads
Full‑thread design with tight tolerance machining ensures smooth engagement, reduces cross-threading, and delivers reliable torque transfer.
✨ Wide Size Range: Over 130 size combinations from M2 (small electronics) to M10 (structural/industrial), lengths and pitches for diverse material thicknesses.
Complete assembly solution: Our pan head screw kits come with flat washers and spring washers to distribute load while preventing loosening. The assortment covers numerous industrial and DIY scenarios, making every installation fast and reliable. The polished 304 stainless steel finish not only provides corrosion resistance but also a clean, professional appearance for exposed applications.
From battery module assembly to communication equipment housing, each component is manufactured according to strict GB818 specifications, ensuring consistent thread geometry and mechanical performance.
Dimension Specification Chart
| Nominal Diameter (d) | Pitch (p) | Head Height (k) | Head Diameter (dk) | Flat Washer O.D. (hd) | Flat Washer Thk (h) | Spring Washer Thk (H) | Nut Thickness (m) |
|---|---|---|---|---|---|---|---|
| M2 | 0.4 | 1.4 | 3 | 4.5 | 0.3 | 0.45 | 1.6 |
| M2.5 | 0.45 | 1.7 | 4.3 | 5 | 0.5 | 0.65 | 1.9 |
| M3 | 0.5 | 1.9 | 5.5 | 6 | 0.5 | 0.85 | 2.3 |
| M3.5 | 0.6 | 2.3 | 5.7 | 7 | 0.5 | 0.95 | 2.8 |
| M4 | 0.7 | 3 | 8 | 8 | 0.5 | 1.25 | 3.1 |
| M5 | 0.8 | 3.6 | 9.5 | 9 | 1 | 1.41 | 4 |
| M6 | 1 | 4.5 | 12 | 11 | 1.6 | 1.76 | 5 |
| M8 | 1.25 | 6 | 16 | 15 | 1.6 | 2.2 | 6 |
| M10 | 1.5 | 7.5 | 20 | 18 | 1.6 | 2.63 | 8 |
Common Applications & Problem‑Solving
📡 Electronic & Communication Equipment
Pan head provides low‑profile flush finish; 304 SS prevents oxidation in sensitive systems. Ideal for securing circuit boards and casings.
🔋 New Energy Battery Manufacturing
Complete kit simplifies high‑volume assembly, spring washer prevents loosening under vibration, resists battery electrolytes corrosion.
🏭 General Industrial & Machinery
Flat+spring washers create stable load‑distributed joint, full‑thread ensures maximum grip even in thick materials.
🛠️ DIY & Maintenance Projects
Furniture assembly, equipment repair, home improvements — all‑in‑one fastener kits for convenience and reliability.
📌 Real Customer Case: Bulk Order for New Energy Battery Manufacturer
A leading new energy battery manufacturer in eastern China placed a bulk order for 200,000 sets of M5x25mm 304 stainless steel pan head screw kits used in lithium‑ion battery module assembly lines. Our team supplied kits with strict dimensional checks, consistent thread quality, and perfect compatibility. The complete kit design reduced assembly sourcing time. After 12 months of production, the manufacturer reported zero issues with loosening or corrosion, leading to a repeat order for additional sizes.
Frequently Asked Questions
Pan head screws have a low‑profile rounded head with flat bearing surface, providing larger contact area than countersunk screws. Ideal for flush finish without countersinking while distributing load effectively.
Yes, 304 stainless steel provides good corrosion resistance for most outdoor applications. For highly corrosive environments (coastal areas), we recommend 316 stainless steel options for enhanced saltwater resistance.
Yes, they can be used with wood, plastic, and composite materials if a pilot hole is drilled to prevent splitting. The included washers distribute load and reduce material damage.
The spring washer provides a locking function, preventing nut loosening under vibration or thermal cycling. It maintains consistent torque on the joint.
No, standard Phillips screwdriver or power driver works perfectly. Pan head design ensures good engagement and reduces cam‑out risk.
Related Fastener Solutions
At DISLAB Precision, we are your trusted global supplier of industrial parts and accessories, including fasteners, spacers, standoffs, and custom hardware solutions. Backed by a network of 300+ qualified partner facilities, we deliver over 50 million pieces monthly, supporting both small samples and large‑volume bulk projects. Every product undergoes strict quality checks for material grade, dimensional accuracy, and surface finish. With 40+ engineering experts, we offer OEM/ODM services, custom materials, and flexible packing.
✔ High quality ✔ Global shipping ✔ Custom drawing support
Direct Contact Channels
- One-stop service: design, customization, production, and global delivery
- OEM/ODM solutions for industrial and export-oriented buyers
