Product Description
DIN 128-A spring lock washer (form A), 3.1 x 6.2 x 0.7 mm, Article number 128A031. Property class / material: steel, surface finish plain. Spring Lock Washer manufactured to DIN 128. 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 128
- Standard description
- A
- Property class / grade
- STEEL
- Class (detailed)
- STEEL
- Material hardness
- HV420-490
- Surface treatment
- Plain (no plating)
- Surface treatment code
- PLAIN
- Diameter
- 3 mm
- Inner diameter
- 3.1 mm
- Outer diameter
- 5.7 mm
- Thickness
- 0.7 mm
- Washer Total Thickness
- 1.1 mm
- Article number
- 128A031
- Category
- Washers / Spring Lock Washers
Standards & Compliance
- Standard
- DIN 128
- Size / Series
- 3.1 x 6.2 x 0.7 mm
- Material
- Steel
- HS Code
- 731821
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 128A031?
- 128A031 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 128A031.
- What is the HS code for 128A031?
- The customs tariff (HS) code for 128A031 is 731821.
- Who manufactures 128A031?
- 128A031 is a Bufab product in the C-Parts range.
- Is a datasheet available for 128A031?
- Yes — the 128A031 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 128A031?
- The minimum order quantity is 1.
- Is 128A031 available?
- Yes — 128A031 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).