# Socket for spark plugs Honiton H4021, 1/2" drive, 21×65 mm

**URL:** https://aio.lv/en/product--honiton-h4021--12254903
**Data updated:** 2026-04-14 22:28 (EEST)
**Category:** Tool kits and accessories
**Manufacturer:** Honiton
**Manufacturer code:** H4021
**EAN:** 8592021007141
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--honiton-h4021--12254903

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Honiton H4021 is a 21×65 mm spark plug socket with a 1/2" square drive designed for removing and installing spark plugs. The tool features a precise internal profile for plug engagement and extended length to reach recessed plugs. Suitable for automotive maintenance, workshop use and professional mechanics working on petrol engines.

## Long description

Honiton H4021 is a 21×65 mm spark plug socket with a 1/2" square drive designed to remove and install spark plugs in gasoline engines. The socket's extended 65 mm length allows access to recessed spark plugs, while the close-tolerance internal profile ensures secure engagement with plug hexes to reduce rounding and slipping. Constructed for workshop and professional use, this tool is suitable for routine maintenance and repair tasks on cars and light vehicles.
Advantages
The Honiton 21×65 mm spark plug socket provides accurate fitment to standard 21 mm plug hexes and sufficient reach for many recessed installations. Its 1/2" drive interface is compatible with common ratchets, torque wrenches and extension bars, enabling controlled tightening and loosening. The longer sleeve helps protect the spark plug during removal by guiding it straight from the well, and the secure internal profile reduces the risk of damage to the plug body.
Suitable for
 Removing and installing spark plugs on petrol engines with 21 mm hex plugs
 Automotive maintenance and service work in home garages and professional workshops
 Use with 1/2" drive ratchets, breakers or torque wrenches and extension bars
When it may not be suitable
This socket is intended for spark plugs with a 21 mm hex and may not fit plugs with different hex sizes or non-standard shapes. It is sized and shaped for gasoline engine spark plugs rather than diesel glow plugs or specialized ignition system components. For extremely tight or corroded plugs, additional penetrating lubricant or impact tools may be necessary and extra care should be taken to avoid thread damage.
Key specifications
 Socket size: 21 mm hex
 Overall usable length: 65 mm
 Drive size: 1/2" square drive
 Application: spark plug removal and installation for petrol engines
How to use
Select the correct 21 mm spark plug socket and attach it to a compatible 1/2" drive ratchet or torque wrench, using an extension if necessary to reach recessed plugs. Before loosening, clean around the spark plug well to prevent debris entering the cylinder. Fit the socket squarely onto the plug hex and turn counterclockwise to loosen. When installing a new plug, thread by hand initially to avoid cross-threading, then use the torque wrench to tighten to the manufacturer's specified torque value.
What to consider before purchase
 Verify your spark plug hex size is 21 mm to ensure compatibility
 Confirm that a 65 mm socket length is sufficient to reach recessed plugs in your vehicle
 Ensure you have a 1/2" drive ratchet or compatible tool for use with this socket
Usage recommendations
Use with a torque wrench for installation to achieve the correct tightening specification, and keep the socket and extension clean to prevent debris from entering the spark plug well. For seized or corroded plugs, apply penetrating oil and allow time to work before applying force.

## FAQ

### How much does the Honiton H4021 spark plug socket 21×65 mm cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Honiton products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Honiton service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12254903/68158865_large.webp