ISO 898-1:2013 defines mechanical and physical property requirements for carbon steel and alloy steel bolts, screws, and studs with ISO metric threads and specified property classes.
It is commonly used to qualify or verify fastener strength grades for purchasing, incoming inspection, and production quality control, using mechanical testing and hardness verification at typical ambient lab temperatures. If you need help aligning your fastener type, size range, and property class to the right verification approach, contact our team.
ISO 898-1:2013 — Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1
ISO 898-1:2013 is an International Standard that specifies property requirements for externally threaded fasteners (bolts, screws, and studs) made of carbon steel or alloy steel, classified by property class.
The standard is written around product compliance and verification of required properties. It supports consistent purchasing specifications and comparable inspection results across suppliers and test labs.
Quick Definition
Document type: Requirements/specification standard for fastener mechanical and physical properties (with referenced verification testing).
Primary focus: Property-class-based requirements for bolts, screws, and studs made from carbon and alloy steels with ISO metric threads.
Typical users: Fastener manufacturers, OEMs, tier suppliers, QA/QC labs, and procurement teams.
What This Standard Covers
ISO 898-1:2013 applies to bolts, screws, and studs made of carbon steel or alloy steel that use triangular ISO metric screw threads. It is written for fasteners evaluated at an ambient temperature range of 10 °C to 35 °C.
The scope is limited to specified thread series and diameter/pitch combinations (including common coarse thread sizes and defined fine pitch ranges) and references the applicable ISO thread standards for profile, size series, and tolerances.
ISO 898-1:2013 also identifies several important exclusions and limits. For example, it does not cover set screws (addressed elsewhere in the ISO 898 series) and it does not set requirements for weldability, corrosion resistance, resistance to shear stress, torque/clamp force performance, or fatigue resistance.
Why This Standard Matters in Testing
When fasteners are purchased or specified by ISO property class, ISO 898-1:2013 is a key reference that ties that property class to measurable mechanical and physical requirements. It helps reduce ambiguity between suppliers and provides a common basis for acceptance testing.
For labs, the practical impact is that the edition cited in a drawing, purchase order, or customer specification can drive exactly what needs to be confirmed and how results should be reported for compliance.
Common Materials, Product Types, or Applications Covered
Common product forms: Carbon steel and alloy steel bolts, screws, and studs with ISO metric threads and specified property classes.
Where it is used: General industrial bolted joints in machinery, equipment builds, fabricated assemblies, and maintenance/repair operations where fasteners are purchased by standardized strength class markings.
Important application note: Some head geometries can reduce the effective shear area in the head versus the thread stress area, which can affect whether a bolt or screw can meet certain tensile or torsional requirements under this standard.
Common Test or Verification Workflow
ISO 898-1:2013 is typically used in supplier qualification, incoming inspection, and periodic audit testing. A common workflow starts with confirming the fastener designation (size, thread pitch, and property class) and then selecting the verification tests appropriate to that product and requirement.
Common verification activities: Mechanical testing to demonstrate strength-related performance and physical property checks commonly associated with property-class compliance (performed at typical ambient lab temperatures stated in the standard).
Practical caution: This standard does not address torque/tension (torque–clamp force) performance or fatigue resistance, so those requirements—when needed—are usually handled by separate specifications and test methods.
Equipment Commonly Used for This Standard
Equipment selection is usually driven by the fastener size range, expected force levels for the property class, and whether the verification program requires axial tensile loading, torsional loading, or hardness/indentation-based checks.
Common equipment families: Universal testing machines configured for fastener tensile testing; appropriate grips/fixtures and threaded adapters for bolts, screws, and studs; hardness testing equipment suitable for fastener verification; and calibrated measurement tools to support dimensional and identification checks as required by a lab’s inspection plan.
Key setup consideration: Fixturing and alignment are critical for fastener testing to avoid bending effects and to ensure repeatable results across lots and suppliers.
How to Read This Designation or Revision
ISO 898-1 identifies Part 1 of the ISO 898 series (externally threaded fasteners). The “:2013” indicates the publication year of the referenced edition.
Because acceptance criteria and referenced details can depend on the exact edition cited in customer documents, it is good practice to match your inspection plan and reporting to the specific ISO 898-1 edition and any applicable corrigenda identified by the purchaser.
Status note: ISO identifies ISO 898-1:2013 as a published standard that has been confirmed in systematic review, and it is also marked in ISO’s lifecycle information as “to be revised.”
Related Standards, Methods, or Frameworks
ISO 898-1:2013 is part of a multi-part ISO 898 family. In practice, it is often paired with the corresponding ISO 898 requirements for nuts when assemblies are confirmed as bolt/nut systems.
The standard also references ISO thread standards for thread form, size series, and tolerances. For applications where torque/clamp force performance is required, ISO 898-1 points users to ISO 16047 as a separate test method rather than treating torque-tension behavior as part of ISO 898-1 compliance.
Get help selecting a test setup for ISO 898-1 verification
If you are building a fastener verification capability or updating an existing lab setup for property-class testing, you can request a detailed quote for a UTM and fixturing package matched to your fastener sizes and target force range.