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The Unifix Form A Washers DIN 125A HV140 M4 are essential hardware components designed for DIY enthusiasts, woodworkers, and professionals who require stable and secure fastening for M4-sized bolts and screws. These washers effectively distribute pressure across a surface, preventing damage to the material being fastened and ensuring a long-lasting hold; however, users should note that they are specifically sized for 4.3mm clearance, making them unsuitable for larger diameter fasteners.
| Colour | Black |
|---|---|
| Model Part Number | 5014196125220 |
| Brand | Unifix |
DIN 125A is a German industrial standard for plain, flat washers that defines the dimensions and tolerances.
No, these washers are specifically designed with a 4.3mm hole for M4 bolts.
These are high-quality steel washers rated HV140 for hardness.
Yes, provided the washer is not deformed or damaged during the removal process.
Pack sizes vary by specific SKU purchase; please verify the quantity on your specific product packaging.
Verify that your bolt is exactly M4; if it is an M5 or larger, this washer will not fit.
Check if the material is compressed too deeply; you may need to ensure the bolt threads are not bottoming out.
To use the Unifix Form A washers effectively, simply slide the washer onto the shank of your M4 bolt before inserting the bolt through your material. Ensure the flat side of the washer faces the material to maximize surface contact. These washers are fully compatible with any standard M4 metric bolt or nut. For maintenance, keep the washers in a dry environment to prevent oxidation, and if you are using them in outdoor or humid settings, periodically check for signs of wear or rust to ensure the integrity of the fastening point remains intact.
