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Technical Specification
PRODUCT NUMBER ST4219BST4219BST3519BST4216BST4816
Type Self-Tapping ScrewSelf-Tapping ScrewSelf-Tapping ScrewSelf-Tapping ScrewSelf-Tapping Screw
Length 19mm19mm19mm16mm16mm
Material SteelSteelSteelSteelSteel
Diameter 4.2mm4.2mm3.5mm4.2mm4.8mm
Diameter Range Up to 10mmUp to 10mmUp to 10mmUp to 10mmUp to 10mm
Finish BlackBlackBlackBlack
Format Single sizeSingle sizeSingle sizeSingle sizeSingle size
Length Range Up to 25mmUp to 25mmUp to 25mmUp to 25mmUp to 25mm
Pieces 100
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Q 1. How many screws are in a pack of BST4819?

A. The BST4819 is supplied as a pack of 100 self-tapping screws.

Q 2. What size are the BST4819 screws?

A. The screws are 4.8 x 19mm.

Q 3. What head type and drive do the BST4819 screws have?

A. They have a flanged Pozi head.

Q 4. What standard are the BST4819 screws manufactured to?

A. The screws are manufactured to BS 4174.

Q 5. How are the screws supplied - can the pack be resealed?

A. Yes, the screws are supplied in a resealable bag for convenient storage.

Q 6. Are there other sizes of this black self-tapping screw available as variants?

A. Yes. Variants in the same product family include BST4813 (4.8 x 13mm), BST4816 (4.8 x 16mm) and BST4825 (4.8 x 25mm), all black flanged Pozi self-tapping screws.

Q 7. How long does delivery take?

A. Standard UK mainland delivery is 3-5 working days.

Q 8. When will my order be dispatched?

A. In-stock orders placed before 14:30 Monday to Friday are usually dispatched the same day.

Q 9. What is your returns policy?

A. We accept returns within 30 days of purchase for items that are unused, undamaged, and in their original packaging. Returns are available only for UK-delivered orders and must include proof of purchase. Before returning an item, please contact us at [email protected] to obtain a Return Merchandise Number (RMN). You may also be asked to share images of the product and its packaging for verification. Items that do not meet these conditions will not be accepted for return. If your return is approved, we will initiate a refund to your credit card or original method of payment. A restocking fee of up to 15% of the order value may apply to each returned item.

Q 10. Is next-day delivery available for this product?

A. Next-day delivery is available on most products and will appear as an option at checkout where eligible.

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