# Spark plug socket 21 mm Top Tools 37D221 — 21mm spark plug wrench

**URL:** https://aio.lv/en/product--top-tools-37d221--11738405
**Data updated:** 2026-03-08 13:41 (EET)
**Category:** Tool kits and accessories
**Manufacturer:** Top Tools
**Manufacturer code:** 37D221
**EAN:** 5902062040657
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--top-tools-37d221--11738405

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Top Tools spark plug socket 37D221 is a 21 mm socket designed for removal and installation of spark plugs. Made for use with hand ratchets or breaker bars, it fits standard 21 mm plug hexes and delivers secure grip for service and maintenance of cars, motorcycles and small engines. Compact design enables work in tight engine bays.

## Long description

Top Tools spark plug socket 37D221 is a 21 mm socket designed for safe and efficient removal and installation of spark plugs. The tool is intended for use with hand ratchets or breaker bars and provides a secure fit on standard 21 mm spark plug hexes. Its compact construction allows access in confined engine compartments and is suitable for maintenance of cars, motorcycles and small engines.
Advantages
The 21 mm spark plug socket features a precise hex profile that reduces slippage and protects the spark plug shell during removal and installation. Made to work with common hand tools, the socket offers compatibility with a wide range of ratchets and extension bars. Its compact design helps reach plugs located deep within tight engine bays, and the durable material construction ensures consistent performance under typical workshop conditions.
Suitable for
Removal and installation of 21 mm spark plugs in passenger cars
Spark plug service on motorcycles and scooters
Maintenance of small engines used in lawn mowers, generators and similar equipment
Use with hand ratchets, breaker bars and extension adapters for confined spaces
Key specifications
Socket size: 21 mm suitable for standard 21 mm spark plug hexes
Drive type: designed for use with hand ratchets or breaker bars (compatible with common drive adapters)
Design: compact socket body for access in tight engine bays
Application: suitable for cars, motorcycles and small engines
How to use
Attach the 21 mm spark plug socket to a compatible hand ratchet or breaker bar and, if needed, add an extension to reach recessed plugs. Seat the socket fully over the spark plug hex and turn counterclockwise to loosen. Remove the plug by hand once loosened. For installation, thread the spark plug by hand first to avoid cross-threading, then tighten with the socket to the manufacturer’s recommended torque. Use steady, controlled force and ensure correct alignment throughout the procedure.
Usage recommendations
Before starting work, verify the correct spark plug size for the engine and consult the vehicle or equipment service manual for recommended torque values. Use appropriate extensions and swivel adapters to maintain safe tool alignment in tight spaces. Inspect the socket for wear or damage before use and replace if deformation or excessive wear is visible.

## FAQ

### How much does the Spark plug socket Top Tools 37D221 21 mm cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 100 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 01.07.2026 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 Top Tools 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 Top Tools 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/11738405/67117643_large.webp