EN 3304:1996
(Main)Aerospace series - Screws, 100° countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature)/315 °C
Aerospace series - Screws, 100° countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature)/315 °C
This standard specifies the characteristics of screws, 100° countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated. Classification: 1100 MPa / 315°C.
Luft- und Raumfahrt - 100° Senk-Paßschrauben mit kleinem Kopf, mit Flügelkreuzschlitz, kurzes Gewinde, aus Titanlegierung, anodisiert, MoS2-geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur)/315 °C
Diese Norm legt die Eigenschaften von 100° Senk-Paßschrauben mit kleinem Kopf und Flügelkreuzschlitz, kurzes Gewinde, aus Titanlegierung, anodisiert, MoS2-geschmiert, fest. Klasse: 1100 MPa / 315°C.
Série aérospatiale - Vis à tête fraisée 100° réduite, à empreinte cruciforme déportée, tige normale à tolérance serrée, filetage court, en alliage de titane, anodisées, lubrifiées MoS2 - Classification: 1 100 MPa (à température ambiante)/315 °C
La présente norme spécifie les caractéristiques des vis à tête fraisée 100° réduite, à empreinte cruciforme déportée, tige normale à tolérance serrée, filetage court, en alliage de titane, anodisées, lubrifiées MoS2. Classification: 1100 MPa / 315°C.
Aerospace series - Screws, 100° countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature)/315°C
General Information
- Status
- Published
- Publication Date
- 24-Sep-1996
- Withdrawal Date
- 30-Mar-1997
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 31-May-2017
- Completion Date
- 21-Jan-2026
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 3304:1996 (CEN) is an aerospace series standard that specifies the characteristics of a specific class of aerospace screws. It covers 100° countersunk reduced head screws with an offset cruciform recess, close-tolerance normal shank, and short thread, manufactured from titanium alloy, anodized, and MoS2 (molybdenum disulfide) lubricated. The standard includes a strength classification of 1100 MPa (at ambient temperature) / 315 °C. The Slovenian identical publication is SIST EN 3304:2001.
Key topics and requirements
- Fastener geometry: Defines the screw head form - 100° countersunk reduced head - and the offset cruciform recess type.
- Shank and thread form: Specifies a close-tolerance normal shank with a short thread length.
- Material and finish: Titanium alloy construction with anodized surface treatment.
- Lubrication: Requirement for MoS2 lubrication to control friction and assembly behavior.
- Mechanical classification: Designated as 1100 MPa / 315 °C, indicating the standard’s intended strength and temperature class.
- Scope boundaries: Targets a narrowly defined aerospace screw variant; users should consult the full standard for detailed dimensional, tolerance and marking requirements (as published by CEN/SIST).
Applications
- Aerospace manufacturing and repair: Selection and procurement of titanium countersunk screws for airframe, structure or cabin components where reduced head geometry and high-strength titanium fasteners are required.
- Design and assembly engineering: Engineers specifying fasteners that require tight shank tolerances, short thread engagement, and controlled friction (MoS2) for torque/ preload consistency.
- Procurement and quality assurance: Purchasing, inspection and acceptance criteria for suppliers and maintenance organizations working to CEN standards.
- Compatibility and safety: Used where consistent mechanical classification and surface treatment (anodizing + MoS2) are required for assembly performance and corrosion considerations in aerospace environments.
Related standards and references
- Organization: CEN (European Committee for Standardization).
- National identical publication: SIST EN 3304:2001 (Slovenia).
- Classification and ICS: Related to bolt and screw standards under ICS group 49.030.20 (Bolts, screws, studs).
Keywords: EN 3304:1996, aerospace screws, 100° countersunk reduced head, offset cruciform recess, titanium alloy screws, anodized, MoS2 lubricated, close tolerance shank, short thread, aerospace fasteners.
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Frequently Asked Questions
EN 3304:1996 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Screws, 100° countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature)/315 °C". This standard covers: This standard specifies the characteristics of screws, 100° countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated. Classification: 1100 MPa / 315°C.
This standard specifies the characteristics of screws, 100° countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated. Classification: 1100 MPa / 315°C.
EN 3304:1996 is classified under the following ICS (International Classification for Standards) categories: 49.030.20 - Bolts, screws, studs. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3304:1996 has the following relationships with other standards: It is inter standard links to EN ISO 15148:2002, EN ISO 9346:2007, EN ISO 12572:2001, EN ISO 13788:2001. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3304:1996 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Screws, 100° countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature)/315°CLuft- und Raumfahrt - 100° Senk-Paßschrauben mit kleinem Kopf, mit Flügelkreuzschlitz, kurzes Gewinde, aus Titanlegierung, anodisiert, MoS2-geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur)/315 °CSérie aérospatiale - Vis a tete fraisée 100° réduite, a empreinte cruciforme déportée, tige normale a tolérance serrée, filetage court, en alliage de titan
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