



S3540NP Raised Head Machine Screws M3.5 x 40mm (Pack Size 100)
S3540NP
S3540NP Raised Head Machine Screws – M3.5 x 40mm Fixings for Extended Electrical Installations (Pack of 100)
The S3540NP Raised Head Machine Screws are ideal for applications requiring extra length, such as deep back boxes and recessed faceplates. With an M3.5 thread and 40mm length, they provide strong, reliable fastening for a wide range of electrical fittings.
- Extra-Length for Extended Reach: Perfect for securing accessories in deep or recessed electrical boxes.
- Electrical Installation Use: Suitable for switches, socket boxes, and conduit fittings in residential and commercial settings.
- High-Quality Material: Manufactured from mild steel or brass for durability and strength.
- Corrosion-Resistant Finish: Brass and zinc plating ensures protection in varied environments.
- Supplied in Trade Pack: Comes in a pack of 100 for convenience on-site or in the workshop.
Technical Specification
- Product Type: Raised head machine screw
- Thread Size: M3.5
- Length: 40mm
- Material: Mild steel / brass
- Finish: Brass and zinc plated
✅ Choose S3540NP Machine Screws for extended-length fixings in demanding electrical applications!

S4 - Screw Size | M3.5 |
Thread Standard | Fully Threaded |
Product | Screw |
Type | Socket Screw |
Diameter | 3.5 mm |
Length | 40 mm |
Use | general purpose |
Material | Steel |
Head Style | Pan |
Overall Length | 40 mm |
Drive Type | Phillips (PH) |
Finish | Nickel Plated |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.