Product Description
DIN 9021 round flat washer, 4.3 x 12 x 1 mm, Article number 4WPM040012. Made in stainless steel a4. Round Flat Washer manufactured to DIN 9021. Standard parts to the same standard, property class, dimensions and surface finish are interchangeable between manufacturers; confirm the controlling standard revision, any class-society or application approval, and the mating thread before substitution. Applications: load distribution and locking under bolt heads and nuts in machine building, structural steel, plant maintenance and marine outfitting.
Technical Specifications
- Standard
- DIN 9021
- Property class / grade
- A4
- Class (detailed)
- A4
- Material hardness
- -
- Surface treatment
- Plain (no plating)
- Surface treatment code
- PLAIN
- Diameter
- 4 mm
- Inner diameter
- 4.3 mm
- Outer diameter
- 12 mm
- Thickness
- 1 mm
- Article number
- 4WPM040012
- Category
- Washers / Plain Washers
Standards & Compliance
- Standard
- DIN 9021
- Size / Series
- 4.3 x 12 x 1 mm
- Material
- Stainless A4
- HS Code
- 731822
Product Documentation
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Technical guides
Catalogue entry last verified: 2026-09-30. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy 4WPM040012?
- 4WPM040012 can be ordered from cballast.com as a Bufab catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this Bufab product?
- The manufacturer part number is 4WPM040012.
- What is the HS code for 4WPM040012?
- The customs tariff (HS) code for 4WPM040012 is 731822.
- Who manufactures 4WPM040012?
- 4WPM040012 is a Bufab product in the C-Parts range.
- Is a datasheet available for 4WPM040012?
- Yes — the 4WPM040012 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 4WPM040012?
- The minimum order quantity is 1.
- Is 4WPM040012 available?
- Yes — 4WPM040012 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).