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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £22.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £22.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £4.99 | 2 to 4 working days |
| Next Day | £9.99 |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £22.95 | 5 to 7 working days |
Product Number: SP3821
When working with larger fasteners at 3/8" drive, you need a socket that delivers strength and precision without rounding. The Sealey SP3821 is a 21mm standard-depth socket for 3/8" square drive, part of Sealey's comprehensive Premier Hand Tools range and designed for daily professional use. Cold-forged from Chrome Vanadium steel, it is hardened and tempered for added strength, ensuring it stands up to repeated professional demands. The WallDrive® configuration contacts the flat faces of fasteners rather than the corners, reducing the risk of rounding and improving torque transfer. A fully polished chrome finish provides corrosion resistance, and the knurled ring ensures a confident grip even with oily hands. Backed by Sealey's lifetime guarantee.
Key Features:PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specializing in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalog of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
| Model No | SP3821 |
|---|---|
| Brand | Premier |
| Depth | Standard |
| Drive | 3/8"Sq |
| Material | Chrome Vanadium |
| Nett Weight | 0.07kg |
| Size | 21mm |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
Standard Delivery: £4.99
Next Day Delivery Available
Delivery Estimate: 2 to 4 working days
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| Technical Specification | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| PRODUCT NUMBER | S0576 | S0577 | S0578 | S0579 | SP1221 | SP1222D | 24230 | 49484 | 33725 | 67377 |
A. The SP3821 is a 21mm socket designed for a 3/8" square drive.
A. The WallDrive® configuration engages the flat faces of a fastener rather than its corners, helping to prevent rounding and allowing greater torque to be applied safely during professional use.
A. It is cold-forged from Chrome Vanadium steel and then hardened and tempered for added strength.
A. The SP3821 is a standard-depth socket.
A. Yes, it features a knurled ring that provides extra grip when working with oily fingers.
A. The SP3821 has a chrome-plated fully polished finish.
A. Yes, it is backed by Sealey's lifetime guarantee.
A. No variants are listed for the SP3821. Please contact Parts for Machines if you require a different depth or drive configuration.
A. Next-day delivery is available on most products and will appear as an option at checkout where eligible.
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.
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