Product Description
DIN 128-A spring lock washer (form A), 5.1 x 9.2 x 1 mm, Article number 128A4051. Made in stainless steel a4. 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
- A4
- Class (detailed)
- A4
- Material hardness
- -
- Surface treatment
- Plain (no plating)
- Surface treatment code
- PLAIN
- Diameter
- 5 mm
- Inner diameter
- 5.1 mm
- Outer diameter
- 8.7 mm
- Thickness
- 1 mm
- Washer Total Thickness
- 1.5 mm
- Article number
- 128A4051
- Category
- Washers / Spring Lock Washers
Standards & Compliance
- Standard
- DIN 128
- Size / Series
- 5.1 x 9.2 x 1 mm
- Material
- Stainless A4
- 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 128A4051?
- 128A4051 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 128A4051.
- What is the HS code for 128A4051?
- The customs tariff (HS) code for 128A4051 is 731821.
- Who manufactures 128A4051?
- 128A4051 is a Bufab product in the C-Parts range.
- Is a datasheet available for 128A4051?
- Yes — the 128A4051 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 128A4051?
- The minimum order quantity is 1.
- Is 128A4051 available?
- Yes — 128A4051 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).