FprEN 6129

Aerospace series - Blind bolt, protruding head, high strength, pulltype

This document specifies the configuration, dimensions, tolerances and mass of a stainless steel blind bolt with protruding head for aerospace application.

Luft- und Raumfahrt - Blindniet, Universalkopf, hochfest (Zugtyp)

Série aérospatiale - Boulon aveugle, tête saillante, haute résistance, installation en tirant

Le présent document spécifie la configuration, les dimensions, les tolérances et la masse d’un boulon aveugle en acier inoxydable, à tête saillante, pour les applications aérospatiales.

Aeronavtika - Slepa kovica, štrleča glava, visoka trdnost, povlečni tip

General Information

• Status: Not Published
• Publication Date: 03-Jan-2027
• ICS: 49.030.20 - Bolts, screws, studs
• ICS: 49.030.60 - Rivets
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 3/S 2 - Fasteners
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 29-May-2026
• Completion Date: 29-May-2026
• Ref Project: oSIST prEN 6129:2024 - Aerospace series - Blind bolt, protruding head, high strength, pulltype

Relations

• Revises: EN 6129:2016/AC:2017 - Aerospace series - Blind bolt, protruding head, high strength, pulltype
• Effective Date: 06-Sep-2023
• Revises: EN 6129:2016 - Aerospace series - Blind bolt, protruding head, high strength, pulltype
• Effective Date: 06-Sep-2023

Overview

FprEN 6129 is a draft European Standard developed under the CEN (European Committee for Standardization), as part of the aerospace series. This document specifies the configuration, dimensions, tolerances, and mass of a high strength, protruding head, pulltype blind bolt made of stainless steel, intended for use in aerospace applications. The blind bolt is engineered to meet the rigorous demands of aerospace fastener assemblies, ensuring reliability, performance, and safety where access is limited to one side of the structure.

The standard supersedes EN 6129:2016, incorporating updated requirements and aligning with current aerospace engineering practices.

Key Topics

• Configuration and Dimensions: FprEN 6129 details the physical characteristics of the blind bolt, including head style, grip range, and designated diameter codes, all vital for precise application in aerospace assemblies.
• Material and Finish: Specifies the use of high-quality stainless steel (such as A-286 CRES and 316 CRES), guiding the preferred passivation and protective coatings to ensure corrosion and heat resistance in demanding environments.
• Mechanical Properties: Sets out minimum requirements for static strength, tensile preload, spindle retention, and mass, supporting robust structural performance and safety in aerospace applications.
• Marking and Designation: Outlines the marking system for traceability and identification on fastener heads, in compliance with the EN 2424.
• Normative References: Links to essential standards such as EN 4473 (fastener coatings), SAE AMS2700 (passivation), and NASM8975 (general fastener specifications), ensuring international interoperability and compliance.

Applications

The FprEN 6129 blind bolt standard is integral to the design, manufacturing, and maintenance of aerospace structures, especially where access is only available from one side, such as in:

• Aircraft fuselage and wing assembly: For securing panels, frames, and structural subassemblies.
• Aerospace engine mounting: Where high strength and reliable fastening are critical, and accessibility may be restricted.
• Spacecraft and satellite construction: Ensures assembly integrity in environments that experience vibration, thermal variation, and corrosion.
• Maintenance, repair, and overhaul (MRO): Provides specification for replacement parts, critical to safety and regulatory compliance.

By adhering to FprEN 6129, aerospace manufacturers, suppliers, and maintenance teams achieve standardized, high-quality blind fastener solutions, reducing risks associated with mismatched hardware and ensuring long-term durability.

Related Standards

FprEN 6129 references several other crucial standards that complement and support its implementation:

• EN 2424: Marking of aerospace products.
• EN 4473: Technical specification for aluminium pigmented coatings for fasteners.
• NASM8975: General specification for aerospace blind fasteners.
• SAE AMS2700: Passivation process for corrosion-resistant steels.
• SAE AMS5687, AMS5690, AMS5737: Material specifications for corrosion and heat-resistant alloys.
• SAE AS5272, AS87132, MIL-PRF-46010, DOD-L-85645: Specifications for various fastener lubricants.

Utilizing these related standards ensures a holistic approach to aerospace fastener quality, performance, and traceability across the global aerospace industry.

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Keywords: FprEN 6129, aerospace blind bolt, protruding head, high strength fastener, stainless steel bolt, CEN standard, aerospace fastener, pulltype blind bolt, EN 6129, aircraft fastener standard.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2024
Aeronavtika - Slepa kovica, štrleča glava, visoka trdnost, povlečni tip
Aerospace series - Blind bolt, protruding head, high strength, pulltype
Luft- und Raumfahrt - Blindniet, Universalkopf, hochfest (Zugtyp)
Série aérospatiale - Boulon aveugle, tête protubérante, haute résistance, installation en
tirant
Ta slovenski standard je istoveten z: prEN 6129
ICS:
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 6129
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2024
ICS 49.030.20 Will supersede EN 6129:2016
English Version
Aerospace series - Blind bolt, protruding head, high
strength, pulltype
Série aérospatiale - Boulon aveugle, tête protubérante, Luft- und Raumfahrt - Blindniet, Universalkopf,
haute résistance, installation en tirant hochfest (Zugtyp)
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 6129:2024 E
worldwide for CEN national Members.

prEN 6129:2024 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Requirements . 5
4.1 Configuration, dimensions, tolerances and static strength, preload and spindle retention 5
4.2 Grip range and mass . 5
4.3 Material, finish and lubrication . 5
5 Designation . 16
6 Marking . 16
7 Technical specification . 16
Bibliography . 17
prEN 6129:2024 (E)
European foreword
This document (prEN 6129:2024) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 6129:2016.
The main changes compared to the previous edition are as follows:
a) Figure 1 and Figure 2 updated (dimension Q removed);
b) dimension Q removed in Table 1 accordingly;
c) Table 1, Table 2 and Table 3: Single values corrected and hole limits removed;
d) Table 5 and Table 6 updated according to updated normative references and preferred options.
prEN 6129:2024 (E)
1 Scope
This document specifies the configuration, dimensions, tolerances and mass of a stainless steel blind bolt
with protruding head for aerospace application.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2424, Aerospace series — Marking of aerospace products
EN 4473, Aerospace series — Aluminium pigmented coatings for fasteners — Technical specification
DOD-L-85645, Lubricant, Dry Film, Molecular Bonded
MIL-PRF-46010, Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting NATO Code – S-1738
NASM8975, Fastener, Blind, High Strength, Installation Formed, Cres, Heat Resistant Steel and Titanium,
General Specification for
SAE AMS2700, Passivation of Corrosion Resistant Steels
SAE AMS5687, Nickel Alloy, Corrosion- and Heat-Resistant, Wire 74Ni-15,5Cr-8,0Fe Annealed
SAE AMS5690, Steel, Corrosion and Heat Resistant, Wire, 17Cr-12N-2.5Mo (316), Solution Heat Treated
SAE AMS5737, Steel, Corrosion and Heat Resistant, Bars, Wire, Forgings, Mechanical Tubing, and Stock for
Forging and Heading 15Cr-25,5Ni-1,2Mo-2,1Ti-0,006B-0,30V (A286) Consumable Electrode Remelted, 1650
°F (899 °C) Solution and Precipitation Heat Treated
SAE AS5272, Lubricant, Solid Film; Heat Cured, Corrosion Inhibiting Procurement Specification
SAE AS87132, Lubricant, Cetyl Alcohol, 1-Hexadecanol, Application to Fasteners
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/

Published by Department of Defense (DoD), available at: https://assist.dla.mil/.
Published by Aerospace Industries Association (AIA), available at: https://www.aia-aerospace.org/.
Published by: Society of Automotive Engineers (SAE), available at: https://www.sae.org/.
prEN 6129:2024 (E)
4 Requirements
4.1 Configuration, dimensions, tolerances and static strength, preload and spindle
retention
The configuration, dimensions, tolerances, static strength, tensile preload and spindle retention shall
conform to Figure 1, Figure 2, Table 1 and Table 2.
4.2 Grip range and mass
Grip range and mass shall be according to Table 3 and Table 4.
4.3 Material, finish and lubrication
Material, finish and lubrication shall be according to Table 5 and Table 6.

a) Bolt configuration
prEN 6129:2024 (E)
b) Serrated pin geometry
Key
1 marking see Clause 6
2 serrated pin
3 locking collar
4 grip
5 sleeve
6 shifting anvil
a
Diameter of serrated pin head shall not exceed “⌀D” max.
b
Fasteners are supplied with shifting anvil/drive washer of manufacturer’s option. The shifting anvil/drive
washer is not part of the installed fastener.
c
optional configuration
Figure 1 — Configuration, Dimensions
prEN 6129:2024 (E)
Key
1 grip
a
Blind side head may be installed on 7° max. slope.
Figure 2 — Typical installation
prEN 6129:2024 (E)
Table 1 — Dimensions and tolerances
Dimensions in mm (inch)
Diameter code
05 06 08
max. 8,33 10,01 13,34
7,52 9,04 12,07
min.
⌀A
(0,328) (0,394) (0,525)
(0,296) (0,356) (0,475)
max. 1,96 2,29 2,97
1,70 2,03 2,72
B
(0,077) (0,090) (0,117)
min.
(0,067) (0,080) (0,107)
±0,03 4,14 5,03 6,58
⌀D
(±0,001) (0,163) (0,198) (0,259)
±0,13 9,53 9,53 9,53
a
⌀J
(±0,005) (0,375)
...