SIST EN 2937:2001

Overview

EN 2937:1994 (adopted as SIST EN 2937:2001) is a CEN aerospace standard that specifies the characteristics of hexagon head screws, threaded to head, manufactured in the heat‑resisting steel FE‑PA92HT (A286). The standard gives a material and performance classification of 900 MPa tensile strength at ambient temperature and a temperature rating up to 650 °C, intended for high‑temperature aerospace applications.

Key topics and requirements

The published title and extract identify the core technical points the standard covers:

• Material designation: FE‑PA92HT, also referenced as A286 (heat‑resisting steel).
• Head and thread form: Hexagon head screws, threaded to the head (full‑thread configuration).
• Mechanical classification:900 MPa tensile strength at ambient temperature.
• Temperature performance: Rated for use up to 650 °C.

In addition to these explicit items, aerospace series fastener standards such as EN 2937 commonly address related characteristic requirements for procurement and engineering, including:

• Dimensional and geometric characteristics (head form and thread extent).
• Identification and marking for traceability to material and mechanical class.
• Quality and inspection criteria to ensure compliance with the specified material and strength classification.
• Designation and ordering information consistent with aerospace procurement practice.

(Only the material, classification and temperature figures above are directly quoted from EN 2937:1994; other listed topics reflect typical content structure for aerospace fastener standards.)

Practical applications

EN 2937 is intended for use where high‑strength, high‑temperature fasteners are required in aerospace systems, for example:

• Hot sections of aircraft engines and auxiliary power units
• Exhaust systems, heat shields and thermal structural assemblies
• Turbine housings and other elevated‑temperature structural joints

Using screws specified to FE‑PA92HT (A286) and the EN 2937 classification helps ensure consistent performance in demanding thermal environments.

Who uses this standard

• Aerospace design and stress engineers specifying fasteners for high‑temperature components
• Procurement and supply chain teams ensuring correct material and classification
• Fastener manufacturers and heat‑treatment shops producing A286 hexagon screws
• Quality, inspection and maintenance teams verifying conformity and traceability

Related standards

• Material specification for A286 / FE‑PA92HT (manufacturer and national material specs)
• Other aerospace fastener standards covering dimensions, coatings, and mechanical classes
• ICS classification: 49.030.20 (Bolts, screws, studs)

Keywords: EN 2937, aerospace screws, hexagon head screw, FE‑PA92HT, A286, heat resisting steel, 900 MPa, 650 °C, aerospace fasteners, CEN.