Heavy Equipment & Agricultural Fasteners
Construction and farm equipment runs on high-strength fasteners because the joints see shock, vibration and weather. Replace like with like: grade, thread, length, finish and nut.
Replacement rules
| Rule | Why |
|---|---|
| Match grade (Grade 8 / 10.9 as fitted) | Joint was designed for that clamp load |
| Match thread pitch (metric fine is common) | Coarse will not fit or will strip |
| Use the matching nut grade | A weak nut strips first |
| Use hardened washers where fitted | Soft washers cup and lose preload |
| Follow the OEM torque | Chart values do not know the joint |
These tables carry the same figures as the printed sheet below.
The printed sheet
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Text version of this sheet
Heavy equipment and agricultural fasteners
What it is
FIELD IDENTIFICATION
Construction and farm equipment runs on high-strength fasteners because the joints see shock,
vibration and weather. Replace like with like: grade, thread, length, finish and nut.
MFG
MFG
10.9
Grade 8
10.9
High-strength grades common on heavy
equipment
Replacement rules
Rule
Why
Match grade (Grade 8 / 10.9 as fitted)
Joint was designed for that clamp load
Match thread pitch (metric fine is common)
Coarse will not fit or will strip
Use the matching nut grade
A weak nut strips first
Use hardened washers where fitted
Soft washers cup and lose preload
Follow the OEM torque
Chart values do not know the joint
Key points
Never replace a marked high-strength bolt with an unmarked one.
Governing standards: OEM service data; SAE J429 (2014); ISO 898-1:2013. 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-4288B5 · thefastenerapp.com/fastener-guide/technical-reference/heavy-equipment-and-agricultural-fasteners · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.
