Cart
POPULAR CATEGORY
ADD TO CART
| 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: SMC21
Variations
Removing castellated locknuts from a motorcycle swingarm without the correct tool risks damaging the nut and wasting time. The Sealey SMC21 is a 4-pin socket specially designed to engage and remove these locknuts accurately and safely. With a 42mm external diameter and a 1/2" square drive, it fits standard drive tools already in your workshop. The internal socket provides a 31.8mm bore to a depth of 5mm stepping down to 26.75mm over a 16mm working depth, with four pins each measuring 5mm wide and 7.5mm deep for a positive engagement. Also suitable for some engine mounting nuts, making it a versatile addition to any motorcycle workshop.
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 | SMC21 |
|---|---|
| Brand | Sealey |
| Nett Weight | 0.115kg |
| External Ø | 42mm |
| Internal Ø | 31.8mm (5mm depth), 26.75mm (16mm depth) |
| Internal Socket Depth | 16mm |
| Number of Pins | 4 |
| Pin Width | 5mm |
| Pin Depth | 7.5mm |
| Drive Type | 1/2"Sq |
| 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
Save Extra With 1 Offer
Compare With Similar Items
Compare with Similar products
|
||||||
| Technical Specification | ||||||
|---|---|---|---|---|---|---|
| PRODUCT NUMBER | SX136 | SX138 | SMC19 | SMC18 | 30831 | 30838 |
A. The SMC21 has an external diameter of 42mm, an internal diameter of 31.8mm (to 5mm depth) stepping to 26.75mm (over 16mm depth), with four pins that are 5mm wide and 7.5mm deep.
A. The SMC21 uses a 1/2" square drive.
A. It is specially designed to remove castellated locknuts found on motorcycle swingarms, and is also suitable for some engine mounting nuts.
A. The SMC21 has 4 pins.
A. The internal socket depth is 16mm.
A. Yes. Parts for Machines supplies genuine Sealey products.
A. Standard UK mainland delivery is 3-5 working days.
A. Yes - WhatsApp us on 07754 288583 with any questions about specifications, suitability, or compatibility, and we'll help you choose the right product.
A. We accept all major credit and debit cards, along with PayPal.
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.
By sharing your email, you agree to our privacy policy & terms of service
Question about this product? Click here
