ISO 3800: Axial Load Fatigue Testing of Threaded Fasteners
ISO 3800 is the test-methods standard for the axial-load fatigue testing of threaded fasteners under fluctuating tension. To match this to your program, talk with our team.
What ISO 3800 Covers
It defines how bolts, screws, and studs are fatigue tested under fluctuating axial load and how the results are evaluated, supporting design validation and supplier qualification.
How the Test Is Run
A fastener is cycled under a defined mean and alternating axial load until failure or run-out, and the fatigue life or strength is evaluated per the method.
Why It Matters
Fatigue performance governs fastener durability under repeated tension; a fatigue-rated axial machine and precise alignment are essential.
Reading the Designation
Cited as ISO 3800 with its edition year. Confirm the edition and specimen or fixture requirements before finalizing setup. To configure a testing setup, request a quote.
TensileMill CNC products for ISO 3800
Our specimen-preparation systems and testing equipment compatible with ISO 3800.

Electro Mechanical Universal Testing System 5 kN / 50 kN with Precision Load Cell
Electro-Mechanical UTM · 5 kN / 50 kN with Precision Load Cell

Threaded Fastener Grips for Bolt and Nut Tensile Testing
Threaded grips for bolt and nut tensile testing
Set up ISO 3800 testing with TensileMill CNC
Tell us your materials, specimen forms, and required test sections, and our team will match the right configuration.