



S420B Brass Pan Head Machine Screws M4 x 20mm (Pack Size 100)
S420B
S420B Brass Pan Head Machine Screws M4 x 20mm – Slotted Metric Fixings for Versatile Installations (Pack of 100)
The S420B Brass Pan Head Machine Screws combine strength, precision, and corrosion resistance, making them ideal for secure fixings in wood, plastic, or nylon plugs. Designed with a slotted pan head and twin metric threads, they offer smooth installation and long-lasting reliability.
- Corrosion-Resistant Brass: Manufactured from high-quality brass for dependable performance in dry, indoor environments.
- Slotted Pan Head: Compatible with hand screwdrivers for controlled and straightforward installation.
- Metric Twin Thread: Provides a strong, secure hold with fast driving capability.
- Gimlet Point Tip: Enables precise placement and easy penetration into target materials.
- Multi-Material Use: Ideal for fixings in timber, plastic, and nylon plugs across a range of light-duty tasks.
Technical Specification
- Material: Brass
- Head Type: Slotted Pan Head
- Thread Type: Metric, Twin Thread
- Screw Size: M4 x 20mm
- Pack Size: 100 pieces
✅ Rely on the S420B Brass Machine Screws for clean, corrosion-resistant fixings in every installation!

S4 - Screw Size | M4 |
Thread Standard | Fully Threaded |
Product | Screw |
Type | Machine |
Diameter | 4 mm |
Length | 20 mm |
Use | general purpose |
Material | Brass |
Head Style | Pan |
Overall Length | 20 mm |
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.