prEN 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: 20-Jan-2026
• 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: 4060 - Closure of enquiry - Enquiry
• Start Date: 17-Oct-2024
• Completion Date: 17-Oct-2024
• 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

prEN 6129:2024 is a European standard established by CEN detailing specifications for aerospace-grade blind bolts featuring a protruding head, high strength, and pull-type installation method. This stainless steel blind bolt is engineered to meet rigorous aerospace demands, ensuring reliable performance through precise configuration, defined dimensions, strict tolerances, and controlled mass.

Developed by ASD-STAN and superseding EN 6129:2016, prEN 6129:2024 delivers updated requirements aligned with current aerospace fastener technology. Its comprehensive scope focuses on ensuring dimensional accuracy, material integrity, and mechanical strength essential for critical aerospace applications.

Key Topics

• Configuration and Dimensions
  The standard specifies exact geometric configurations, including the protruding head and serrated pin geometry, designed for optimal installation and performance in aerospace assemblies.

• Tolerances and Strength Requirements
  It sets allowable dimensional tolerances and defines key mechanical properties such as static strength, tensile preload, and spindle retention values, critical to maintaining structural integrity under operational stresses.

• Grip Range and Mass
  Detailed tables establish grip length ranges for different diameter codes (05, 06, 08) and provide precise mass values per 1,000 pieces to inform weight-critical aerospace design considerations.

• Material, Finish, and Lubrication
  The bolt comprises stainless steel materials meeting SAE AMS specifications (including A-286, 316 CRES, Inconel options), with finish codes defining passivation and protective coatings. Lubrication standards are specified to ensure corrosion resistance and installation quality.

• Designation and Marking
  The standard includes a structured designation system for identification and traceability, alongside marking requirements based on EN 2424 to ensure efficient fastener management and compliance verification.

Applications

• Aerospace Structural Assemblies
  prEN 6129 blind bolts are designed for use in aircraft and spacecraft assemblies requiring high-strength, reliable fastening solutions with minimized weight impact.

• Maintenance and Repair
  The pull-type blind bolt installation enables access-limited fastening, simplifying maintenance in confined aerospace structures without compromising structural performance.

• High-Performance Environments
  With corrosion-resistant stainless steel materials and validated mechanical properties, these blind bolts are ideal for aeronautical components exposed to extreme environments, thermal cycles, and mechanical fatigue.

• Precision Engineering
  The standard’s tight dimensional tolerances and defined grip ranges support precision engineering applications within aerospace, ensuring proper fit and load distribution in multi-material assemblies.

Related Standards

• EN 2424 - Aerospace product marking
  Provides guidance on marking aerospace fasteners for identification consistent with prEN 6129 marking requirements.

• EN 4473 - Aluminium pigmented coatings for fasteners
  Specifies technical coatings applicable to aerospace fasteners, complementing prEN 6129 finish specifications.

• SAE AMS2700 - Passivation of corrosion resistant steels
  Governs passivation processes referenced by prEN 6129 for stainless steel components to enhance corrosion resistance.

• NASM8975 - General specification for blind high-strength fasteners
  Serves as the technical foundation for prEN 6129 fastener specifications, particularly for strength, preload, and retention criteria.

• MIL-PRF-46010, SAE AS5272 - Solid film lubricants
  Standards referenced for lubrication materials ensuring fastener reliability and resistance to corrosion and wear.

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By adhering to prEN 6129:2024, aerospace manufacturers and suppliers ensure that blind bolts used in critical aerospace structures meet stringent quality, safety, and performance standards-key drivers of aerospace industry innovation and reliability. This standard facilitates global harmonization of high-strength blind bolt specifications, optimizing supply chain consistency and operational excellence in aeronautics.

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
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.

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
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.
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/.
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
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
Key
1 grip
a
Blind side head may be installed on 7° max. slope.
Figure 2 — Typical installation
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)
...