AS/NZS 1252 Structural Bolting - Australia and New Zealand
AS/NZS 1252 covers high-strength structural bolt, nut and washer assemblies used in Australia and New Zealand. Bolts are property class 8.8 with heavy hex nuts and hardened washers.
At a glance
| Bolt | Property class 8.8, heavy hex; commonly marked 8.8/S (S = structural) |
|---|---|
| Nut | Heavy hex, property class 8 |
| Washer | Hardened flat washer |
| Finish | Commonly hot-dip galvanized |
| Installation | Tensioned per AS 4100 (part-turn or direct tension indication) |
Not the same as commercial bolts
| Standard | Use |
|---|---|
| AS/NZS 1252 | Structural, preloaded connections |
| AS 1111 | Commercial bolts, typically class 4.6 |
| AS 1110 | Precision bolts |
These tables carry the same figures as the printed sheet below.
The printed sheet
See an error on this sheet?
Tell us what is wrong.
Text version of this sheet
AS/NZS 1252 · high-strength structural bolt assemblies
FIELD IDENTIFICATION
What it is
AS/NZS 1252 covers high-strength structural bolt, nut and washer assemblies used in Australia and
New Zealand. Bolts are property class 8.8 with heavy hex nuts and hardened washers.
MFG
8.8/S
Structural class 8.8 bolt (8.8/S)
At a glance
Bolt
Property class 8.8, heavy hex; commonly marked 8.8/S (S = structural)
Nut
Heavy hex, property class 8
Washer
Hardened flat washer
Finish
Commonly hot-dip galvanized
Installation
Tensioned per AS 4100 (part-turn or direct tension indication)
Not the same as commercial bolts
Standard
Use
AS/NZS 1252
Structural, preloaded connections
AS 1111
Commercial bolts, typically class 4.6
AS 1110
Precision bolts
Key points
A commercial 8.8 bolt is not an AS/NZS 1252 structural assembly.
Do not mix components between AS/NZS 1252, EN 14399 and ASTM F3125 systems.
Governing standards: AS/NZS 1252; AS 4100; AS 1111; AS 1110. Editions shown are the latest confirmed as of September 2026. The drawing and the governing standard always
take precedence over this sheet.
torquing any fastener. Verify the current governing standard, project documents, OEM requirements, size, thread, coating and lot certification. To the fullest extent permitted by law, The Fastener App disclaims liability
arising from reliance on this reference.
Fastener Guide reference FG-18739E · thefastenerapp.com/fastener-guide/technical-reference/as-nzs-1252-structural-bolting · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.
