SIST EN 3759:2001

Aerospace series - Screws, pan head, offset cruciform recess, threaded to head, in heat and corrosion resisting steel, passivated - Classification: 1 100 MPa (at ambient temperature)/425 °C

This standard specifies the characteristics of screws, pan head, offset cruciform recess, threaded to head, in heat and corrosion resisting steel, passivated. Classification: 1 100 MPa / 425°C.

Luft- und Raumfahrt - Flachkopfschrauben mit Flügelkreuzschlitz, Gewinde annähernd bis Kopf, aus korrosionsbeständigem Stahl, passiviert - Klasse: 1 100 MPa (bei Raumtemperatur)/425 °C

Diese Norm legt die Eigenschaften von Flachkopf-Paßschrauben mit Flügelkreuzschlitz und Gewinde annähernd bis Kopf, aus korrosionsbeständigem und hochwarmfestem Stahl, passiviert, fest. Klasse: 1 100 MPa / 425°C.

Série aérospatiale - Vis a tete cylindrique, a empreinte cruciforme déportée, filetées jusqu'a proximité de la tete, en acier résistant a chaud et a la corrosion, passivées - Classification: 1 100 MPa (a température ambiante)/425 °C

La présente norme spécifie les caractéristiques des vis à tête cylindrique, à empreinte cruciforme déportée, filetées jusqu'à proximité de la tête, en acier résistant à chaud et à la corrosion, passivées. Classification: 1 100 MPa / 425°C

Aerospace series - Screws, pan head, offset cruciform recess, threaded to head, in heat and corrosion resisting steel, passivated - Classification: 1 100 MPa (at ambient temperature)/425 °C

General Information

• Status: Published
• Publication Date: 31-Dec-2000
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2001
• Due Date: 01-Jan-2001
• Completion Date: 01-Jan-2001
• Ref Project: EN 3759:1996 - Aerospace series - Screws, pan head, offset cruciform recess, threaded to head, in heat and corrosion resisting steel, passivated - Classification: 1 100 MPa (at ambient temperature)/425 °C

Overview

SIST EN 3759:2001 is a European standard developed by CEN that defines the specifications for aerospace-grade screws. These screws are pan head type with an offset cruciform recess and feature threading that extends to the head. Made from heat and corrosion-resistant steel, the screws are passivated to enhance durability and resistance to environmental degradation. This standard classifies these screws to withstand mechanical stresses up to 1,100 MPa at ambient temperature and remain effective at elevated temperatures up to 425 °C.

This standard ensures consistent quality, reliability, and performance for aerospace fasteners used in critical applications requiring high strength and corrosion resistance.

Key Topics

• Screw Type: Pan head screws with an offset cruciform recess
• Threading: Threaded to the head, allowing for full engagement and secure fastening
• Material: Heat and corrosion-resistant steel, passivated to protect against oxidation and corrosion
• Mechanical Properties: Classification to withstand 1,100 MPa tensile strength at room temperature
• Temperature Resistance: Functional performance maintained up to 425 °C
• Passivation: Surface treatment process that enhances corrosion resistance without affecting mechanical properties
• Application: Designed specifically for aerospace use, ensuring compliance with stringent industry requirements

Applications

SIST EN 3759:2001 screws are primarily used in the aerospace industry, where fasteners must withstand extreme mechanical stresses and harsh environmental conditions. Typical applications include:

• Aircraft Structural Assemblies: Securing components subjected to high mechanical loads and temperature variations
• Engine Components: Fastening parts in heat-intensive areas requiring corrosion resistance and high strength
• Spacecraft Construction: Materials and fasteners that resist oxidation and degradation in diverse atmospheric conditions
• Aerospace Equipment Maintenance and Repair: Replacement and retrofit with standardized, certified screws to ensure safety and integrity
• High-Temperature Environments: Machinery and equipment in aerospace that operate under elevated temperatures require reliable fasteners as specified in this standard

Using screws manufactured to SIST EN 3759:2001 helps manufacturers and maintenance teams meet critical safety standards while optimizing durability and performance.

Related Standards

• EN ISO 7046 – Pan head screws with different recess types for aerospace applications
• EN 4000 Series – Fasteners in corrosion-resistant alloys designed for high-temperature use
• ISO 4762 – Hexagon socket head cap screws with high tensile strength steel
• ASTM F738 – Standard specification for fasteners used in aerospace corrosion environments
• MIL-S-7742 – Military specification for aerospace screws, including strength and corrosion resistance requirements

Compliance with SIST EN 3759:2001 alongside these related standards ensures comprehensive quality control and harmonization across aerospace fasteners, contributing to industry safety and operational excellence.

---

By adhering to SIST EN 3759:2001, aerospace manufacturers and suppliers can deliver high-performance fasteners that meet strict mechanical and environmental requirements, crucial for the demanding aerospace sector. This standard supports safety, reliability, and long service life of aerospace components exposed to rigorous conditions.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Screws, pan head, offset cruciform recess, threaded to head, in heat and corrosion resisting steel, passivated - Classification: 1 100 MPa (at ambient temperature)/425 °CLuft- und Raumfahrt - Flachkopfschrauben mit Flügelkreuzschlitz, Gewinde annähernd bis Kopf, aus korrosionsbeständigem Stahl, passiviert - Klasse: 1 100 MPa (bei Raumtemperatur)/425 °CSérie aérospatiale - Vis a tete cylindrique, a empreinte cruciforme déportée, filetées jusqu'a proximité de la tete, en acier résistant a chaud e
...