SIST EN 3196:2001

Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel FE-PA92HT (A286), silver plated - Classification: 1 100 MPa (at ambient temperature) / 425 °C

This standard specifies the characteristics of self-locking hexagonal nuts in FE-PA92HT, silver plated, for aerospace applications.

Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA92HT (A286), versilbert - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °C

Diese Norm legt die Eigenschaften von selbstsichernden Sechskantmuttern aus FE-PA92HT, versilbert, zur Verwendung in der Luft- und Raumfahrt fest.

Série aérospatiale - Ecrous hexagonaux, a freinage interne, en acier résistant a chaud FE-PA92HT (A286), argentés - Classification: 1 100 MPa (a température ambiante) / 425 °C

La présente norme spécifie les caractéristiques des écrous hexagonaux, à freinage interne, en FE-PA92HT, argentés, pour les applications aérospatiales.

Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel FE-PA92HT (A286), silver plated - Classification: 1 100 MPa (at ambient temperature) / 425 °C

General Information

• Status: Published
• Publication Date: 31-Dec-2000
• ICS: 49.030.30 - Nuts
• 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 3196:1994 - Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel FE-PA92HT (A286), silver plated - Classification: 1 100 MPa (at ambient temperature) / 425 °C

Overview

EN 3196:1994 is a CEN aerospace standard that specifies the characteristics of hexagonal, self-locking nuts made from heat-resisting steel FE-PA92HT (A286) with a silver plating finish. The standard covers nuts classified for high-strength performance - 1 100 MPa at ambient temperature and rated up to 425 °C - intended for demanding aerospace environments. EN 3196 has been adopted nationally (e.g., SIST EN 3196:2001).

Key topics and requirements

The standard focuses on the essential attributes required for reliable, high-temperature aerospace fasteners. Key technical topics include:

• Material specification: Heat resisting stainless steel FE-PA92HT (A286) as the base material.
• Mechanical classification: Strength classification 1 100 MPa (ambient) with performance up to 425 °C.
• Nut type: Hexagonal, self-locking design intended to resist loosening under vibration and thermal cycling.
• Plating/finish: Silver plated surface treatment for corrosion resistance and conductive properties where required.
• Aerospace suitability: Criteria ensuring components meet aerospace safety, reliability, and environmental demands.
• Identification and marking: Requirements for marking to support traceability (manufacturer, material/classification).
• Quality and conformity: Expectations for manufacturing quality control and inspection to meet aerospace procurement standards.

(Note: EN 3196 specifies these characteristic categories rather than detailed dimensional series in this summary.)

Applications

EN 3196 is intended for use where high strength and elevated temperature resistance are required. Typical practical applications include:

• Fastening structural components in aircraft airframes
• Engine and hot-section assemblies where temperatures approach several hundred degrees Celsius
• High-temperature service items in aerospace ground support equipment
• Any application requiring self-locking nuts, corrosion-resistant silver plating, and A286/FE-PA92HT performance

Using EN 3196-compliant nuts helps ensure reliability under vibration, thermal cycling, and corrosive atmospheres common in aerospace service.

Who uses this standard

Primary stakeholders and users:

• Aerospace design and stress engineers specifying fasteners
• Fastener manufacturers producing heat-resisting nuts
• Procurement and supply chain teams ensuring part compliance
• Quality assurance, inspection, and maintenance personnel
• Certification bodies and regulatory agencies reviewing component conformity

Related standards

• Other CEN EN specifications for aerospace fasteners (nuts, bolts, washers) and material standards for A286/FE-PA92HT.
• National adoptions such as SIST EN 3196:2001 (Slovenia).

Keywords: EN 3196, aerospace nuts, self-locking hexagonal nut, FE-PA92HT, A286, silver plated, heat resisting steel, classification 1100 MPa, 425 °C.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Nuts, hexagonal, self-locking, in heat resisting steel FE-PA92HT (A286), silver plated - Classification: 1 100 MPa (at ambient temperature) / 425 °CLuft- und Raumfahrt - Sechskantmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA92HT (A286), versilbert - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °CSérie aérospatiale - Ecrous hexagonaux, a freinage interne, en acier résistant a chaud FE-PA92HT
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