# Grounding washer M4 SCHROFF 21120148 pack of 100 - grounding/earthing washer 4.1/8

**URL:** https://aio.lv/en/product--schroff-21120148--10697423
**Data updated:** 2026-02-12 22:03 (EET)
**Category:** Furniture Accessories
**Manufacturer:** SCHROFF
**Manufacturer code:** 21120148
**EAN:** 4036088111440
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 24.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 20.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--schroff-21120148--10697423

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

Grounding washer M4 by SCHROFF (MPN 21120148) is supplied as a pack of 100 pieces. Designed for M4 fasteners, this grounding/earthing washer (designation 4.1/8) provides reliable electrical contact and mechanical stability for chassis, enclosures and electronic assemblies. Suitable for use in grounding connections, equipotential bonding and EMC applications where secure metal-to-metal contact is required.

## Long description

Grounding washer M4 by SCHROFF is supplied as a pack of 100 pieces and is designed for use with M4 fasteners. The washer has a 4.1/8 designation and provides a reliable metal-to-metal contact surface for chassis, enclosures and electronic assemblies where grounding, earthing and equipotential bonding are required. It is engineered to maintain electrical continuity while giving mechanical stability to fastened joints in equipment racks, cabinets and device housings.
Advantages
The washer combines a contact-enhancing profile with robust mechanical properties to ensure stable grounding performance. Its dimensions match standard M4 fasteners, allowing easy replacement or installation without altering existing assembly procedures. Packaged in quantities of 100, the set simplifies inventory management and supports consistent application across multiple grounding points. The design reduces the risk of loosening and helps maintain low-resistance connections under typical mechanical and thermal stress.
Suitable for
 Grounding and earthing connections in electronic equipment
 Equipotential bonding of metal chassis and frames
 EMC and RFI mitigation where secure metal contact is required
 Assembly and maintenance of server racks, enclosures and telecom cabinets
Key specifications
 Intended fastener size: M4
 Designation / seating size: 4.1/8
 Pack quantity: 100 pieces
 Function: grounding/earthing washer to ensure electrical contact and mechanical stability
How to use
Place the grounding washer under the head of the M4 fastener or beneath the nut so that the washer makes direct contact with the metal surfaces to be bonded. Tighten the fastener to the manufacturer-recommended torque for the assembly; ensure the mating surfaces are clean and free of paint, oxide or debris to achieve low contact resistance. When used in series at multiple grounding points, maintain consistent installation orientation and torque values to ensure uniform electrical continuity across the assembly.
Usage recommendations
For reliable grounding performance, inspect mating surfaces before installation and replace washers showing signs of corrosion or physical damage. Use in conjunction with appropriate fasteners and grounding straps where higher current capacity or redundancy is required. Store the pack in a dry environment to avoid contamination and preserve contact integrity.

## FAQ

### How much does the Grounding washer M4 SCHROFF 21120148 cost, and is it available for purchase?

The price is 24.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 23.07.2026 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. 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 SCHROFF 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 SCHROFF 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/10697423/59878664_large.webp