🔩 Truss Head Machine Screws Sets – A2 Stainless Steel, Includes Nut + Spring & Flat Washer (M2–M5)
You’re assembling a plastic enclosure, mounting a sign, or fastening a panel that needs a wide, low‑profile head – and you want a complete fastener set that includes the screw, nut, spring washer, and flat washer. These truss head machine screw sets save you time and ensure you have the right hardware. The extra‑wide truss head distributes pressure evenly, preventing pull‑through in soft materials. Made from A2 stainless steel (304), they resist rust and corrosion for indoor and light outdoor use. Each set includes a matching hex nut, a spring (split) lock washer, and a flat washer – all pre‑matched. Available in M2, M3, M4, and M5 diameters. Fully threaded. Perfect for machinery, furniture, electronics, and general assembly.
✨ Key Features – Complete Truss Head Screw Sets
- 🔘 Truss head design – Extra‑wide, low‑profile head provides a large bearing surface. Ideal for plastic, fiberglass, and thin sheet metal.
- 🛡️ A2 stainless steel (304) – Excellent corrosion resistance, oxidation resistance, and durability. A2‑70 grade (tensile strength 700 N/mm²).
- 🔩 Complete 4‑piece set – Each set includes: truss head screw + hex nut + spring (split) lock washer + flat washer. No separate shopping.
- 🔧
Phillips drive – Standard cross recess works with common screwdrivers. Good torque transfer.
- 📏 Metric sizes M2, M3, M4, M5 – Popular diameters for small to medium fastening applications.
- 📐 Fully threaded – Threads run the entire length under the head. Maximum grip in blind holes or through‑nut assemblies.
- 🔧 Versatile use – Machinery guards, electronic enclosures, furniture, marine hardware, and general DIY.
📏 Specifications – Truss Head Screw Sets (A2 Stainless)
| Thread Diameter (M) |
Thread Pitch (mm) |
Typical Lengths (mm, under head) * |
Included Components |
Material |
| 📐 Length measured from underside of head to tip (grip length). Fully threaded. Select exact size and length from dropdown. |
| M2 |
0.4 |
4, 5, 6, 8, 10, 12, 16, 20, 25, 30 (exact availability varies) |
Truss head screw + hex nut + spring washer + flat washer |
A2 304 Stainless Steel |
| M3 |
0.5 |
| M4 |
0.7 |
| M5 |
0.8 |
* Lengths are typical – exact availability may vary. Select your required size from the dropdown. Washers and nut are sized to match the screw thread.
🛠️ What Each Component Does
| Component |
Function |
| Truss head screw |
Wide, low‑profile head distributes clamping force – prevents pull‑through in soft materials. |
| Hex nut |
Standard metric nut for secure through‑hole fastening. |
| Spring (split) washer |
Provides tension to prevent loosening from vibration. |
| Flat washer |
Spreads load, protects surface, and prevents the nut from marring the workpiece. |
❓ Frequently Asked Questions – Truss Head Screw Sets
1. How do I measure the length of a truss head screw?
For truss head screws, length is measured from the underside of the head (the flat bearing surface) to the tip. The head itself is NOT included. So an “M4 x 10mm” screw has a 10mm long threaded shaft under the head. All our lengths follow this standard.
2. Are the nut and washers made of stainless steel too?
Yes – all components (screw, nut, spring washer, flat washer) are made from A2 stainless steel (304) for consistent corrosion resistance.
3. Are these screws fully threaded? What about longer lengths?
Yes – all screws in this range (M2 to M5, up to the lengths shown) are fully threaded from under the head to the tip, giving you maximum grip in blind holes or when using the nut.
4. Can I use these screws outdoors? Will they rust?
A2 stainless steel (304) is highly corrosion‑resistant and suitable for outdoor use in most environments – rain, humidity, and coastal areas. For continuous saltwater immersion, consider A4 (316) stainless, but for general outdoor furniture and machinery, A2 is excellent.
5. Why does 304 stainless sometimes stick to a magnet?
304 stainless is normally non‑magnetic, but cold working (like thread rolling) can transform some austenite into martensite, which is magnetic. This is normal and does not affect corrosion resistance.
6. Do you offer larger sizes like M6 or M8?
This listing covers M2 to M5. We also carry M6, M8, and larger sizes in similar sets – please check our store or contact us.
