Product Description
ISO 4033 hexagon nut, M18, Article number 40338181. Property class / material: steel class 8, surface finish zinc plated. Hexagon Nut manufactured to ISO 4033 with ISO metric (M) thread, coarse pitch, fully threaded. 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.
Technical Specifications
- Standard
- ISO 4033
- Property class / grade
- CL.8
- Class (detailed)
- CL.8
- Thread type
- M
- Thread diameter
- 18 mm
- Pitch
- 2.5 mm
- Thread pitch class
- Coarse
- Thread direction
- Right
- Threading
- Fully Threaded
- Key width (across flats)
- 27 mm
- Surface treatment
- Zinc Bright Passivation Fe/Zn P1 (ZPL 3+)
- Surface treatment code
- ZPL
- Nut thickness
- 17.6 mm
- Thread standard
- ISO metric (M)
- Article number
- 40338181
- Category
- Nuts / Hexagon Nuts
Standards & Compliance
- Standard
- ISO 4033
- Size / Series
- M18
- Material
- Steel class 8
- Thread Standard
- ISO metric (M)
- HS Code
- 731816
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 40338181?
- 40338181 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 40338181.
- What is the HS code for 40338181?
- The customs tariff (HS) code for 40338181 is 731816.
- Who manufactures 40338181?
- 40338181 is a Bufab product in the C-Parts range.
- Is a datasheet available for 40338181?
- Yes — the 40338181 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 40338181?
- The minimum order quantity is 1.
- Is 40338181 available?
- Yes — 40338181 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).