EN ISO 6149-3:2007 PDF

Connections for hydraulic fluid power and general use - Ports and stud ends with ISO 261 metric threads and O-ring sealing - Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends (ISO 6149-3:2006)

Title (English):

EN ISO 6149-3:2007

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 18
Publication date:: February 21, 2007
Edition:: CEN EN 6149 edition 1 version 1
ICS:: 23.100.40

Document language:

enru

Delivery time:1–7 days

Price:66 €

Description (English):

ISO 6149-3:2006 specifies dimensions, performance requirements and test procedures for metric adjustable and non-adjustable light-duty (L series) stud ends and O-rings. Stud ends in accordance with ISO 6149-3:2006 may be used at working pressures up to 40 MPa (400 bar) for non-adjustable stud ends and 31,5 MPa (315 bar) for adjustable stud ends. The permissible working pressure depends upon the stud end size, materials, design, working conditions, application, etc.

Technical details

Technical committee: ECISS/TC 110 - Steel tubes, and iron and steel fittings
SKU: EN ISO 6149-3:2007

Abstract

Overview

EN ISO 6149-3:2007 / ISO 6149-3:2006 specifies the dimensions, design, test methods and performance requirements for metric light‑duty (L‑series) stud ends with ISO 261 metric threads and O‑ring sealing for hydraulic fluid power and general use. Adopted by CEN as EN ISO 6149-3:2007, this part of ISO 6149 covers both adjustable and non‑adjustable stud ends and the matching O‑rings.

Key topics and technical requirements

Scope: Metric adjustable and non‑adjustable L‑series stud ends and O‑rings; applicable to hydraulic fluid power and general pressurized fluid systems.
Dimensions & identification: Detailed dimensional specifications, identification marks and designation format (example: “Stud end ISO 6149-3 - M18 × 1,5”).
Working pressure: Rated up to 40 MPa (400 bar) for non‑adjustable stud ends and 31.5 MPa (315 bar) for adjustable stud ends (permissible pressure depends on size, material and application).
Performance tests: Burst and cyclic endurance (impulse) tests are required and shall be performed in accordance with ISO 19879. Conformance to dimensions alone does not guarantee required performance - manufacturers must test to demonstrate ratings.
O‑rings: Dimensional and material guidance for O‑rings (default: NBR, hardness 90 ± 5 IRHD, per ISO 48 and acceptance criteria in ISO 3601‑3, grade N). Manufacturers should select alternative materials where different fluids or temperatures are used.
Tolerances & fastener standards: Hex tolerances across flats per ISO 4759‑1 (product grade C); threads per ISO 261/ISO 965.

Practical applications and users

Who uses EN ISO 6149‑3:

Hydraulic system designers and OEM engineers specifying ports and connectors
Manufacturers of tube/hose fittings, stud ends and connectors
Test laboratories validating burst and impulse performance
Procurement and quality teams ensuring component conformity
Maintenance and service engineers replacing hydraulic connectors

Practical benefits:

Standardized metric threaded ports with O‑ring sealing simplify global sourcing and interchangeability
Clear test and material guidance helps ensure safe operation at high working pressures
Designation and identification rules aid traceability and correct installation

Related standards

ISO 6149 series (Part 1, Part 2 - S series heavy‑duty, Part 4)
ISO 19879 (test methods for hydraulic connections)
ISO 3601‑3 (O‑ring acceptance criteria)
ISO 261 / ISO 965 (metric threads)
ISO 48 (rubber hardness), ISO 4759‑1 (fastener tolerances), ISO 5598 (vocabulary)

EN ISO 6149‑3 is essential for anyone specifying or producing light‑duty metric stud ends with O‑ring sealing in hydraulic and pressurized fluid systems.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope: Metric adjustable and non‑adjustable L‑series stud ends and O‑rings; applicable to hydraulic fluid power and general pressurized fluid systems.
Dimensions & identification: Detailed dimensional specifications, identification marks and designation format (example: “Stud end ISO 6149-3 - M18 × 1,5”).
Working pressure: Rated up to 40 MPa (400 bar) for non‑adjustable stud ends and 31.5 MPa (315 bar) for adjustable stud ends (permissible pressure depends on size, material and application).
Performance tests: Burst and cyclic endurance (impulse) tests are required and shall be performed in accordance with ISO 19879. Conformance to dimensions alone does not guarantee required performance - manufacturers must test to demonstrate ratings.
O‑rings: Dimensional and material guidance for O‑rings (default: NBR, hardness 90 ± 5 IRHD, per ISO 48 and acceptance criteria in ISO 3601‑3, grade N). Manufacturers should select alternative materials where different fluids or temperatures are used.
Tolerances & fastener standards: Hex tolerances across flats per ISO 4759‑1 (product grade C); threads per ISO 261/ISO 965.

Practical applications and users

Who uses EN ISO 6149‑3:

Hydraulic system designers and OEM engineers specifying ports and connectors
Manufacturers of tube/hose fittings, stud ends and connectors
Test laboratories validating burst and impulse performance
Procurement and quality teams ensuring component conformity
Maintenance and service engineers replacing hydraulic connectors

Practical benefits:

Standardized metric threaded ports with O‑ring sealing simplify global sourcing and interchangeability
Clear test and material guidance helps ensure safe operation at high working pressures
Designation and identification rules aid traceability and correct installation

Related standards

ISO 6149 series (Part 1, Part 2 - S series heavy‑duty, Part 4)
ISO 19879 (test methods for hydraulic connections)
ISO 3601‑3 (O‑ring acceptance criteria)
ISO 261 / ISO 965 (metric threads)
ISO 48 (rubber hardness), ISO 4759‑1 (fastener tolerances), ISO 5598 (vocabulary)

EN ISO 6149‑3 is essential for anyone specifying or producing light‑duty metric stud ends with O‑ring sealing in hydraulic and pressurized fluid systems.

EN ISO 6149-3:2007 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

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