kSIST FprEN 6129:2026

• Abstract:

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

• Status: Not Published
• Public Enquiry End Date: 15-Oct-2024
• ICS: 49.030.20 - Bolts, screws, studs
• ICS: 49.030.60 - Rivets
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 06-Aug-2026
• Due Date: 24-Sep-2026
• Completion Date: 07-Aug-2026
• Ref Project: FprEN 6129 - Aerospace series - Blind bolt, protruding head, high strength, pulltype

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

Overview

kSIST FprEN 6129:2026 is a European Draft Standard developed by the Slovenian Institute for Standardization (SIST), focusing on blind bolt fasteners used in aerospace applications. It specifies the configuration, dimensions, tolerances, and mass of high-strength, pulltype, stainless steel blind bolts featuring a protruding head. These fasteners are essential for situations where only one side of a structure is accessible for installation, a common scenario in aerospace engineering.

This standard is intended to align with the latest European requirements, serving the aerospace industry with up-to-date technical specifications for reliable, high-strength blind bolts. It supersedes the earlier EN 6129:2016, introducing several updates in figures, tables, and preferred options for materials and finishes.

Key Topics

• Product Scope: Stainless steel, high-strength blind bolts with protruding head, pulltype design.
• Configuration and Geometry: Detailed dimensions, tolerances, static strength, preload, and retention characteristics.
• Grip Range and Mass: Comprehensive tables specifying grip lengths and the associated masses for various bolt diameters.
• Material Requirements:
  • A-286 corrosion-resistant steel (CRES)
  • 316 CRES
  • Nickel alloy options per relevant aerospace material specifications
• Surface Finishes and Lubrication:
  • Passivation per SAE AMS2700
  • Aluminium pigmented coatings (EN 4473)
  • Solid film lubricants for corrosion resistance
• Designation and Marking: Specific marking requirements to ensure traceability and standardization, aligned with EN 2424.
• Technical Specification: Adopts NASM8975 as the general fastener specification, with certain requirements unique to this standard.

Applications

Blind bolts as specified in kSIST FprEN 6129:2026 are critical in the following areas:

• Aircraft and Aerospace Structures: Used extensively in assembling airframes, control surfaces, interior panels, and other components where structural integrity is paramount and access may be limited to only one side.
• Maintenance and Upgrades: Suitable for repairs in restricted-access zones of aircraft and satellites, allowing secure fastening without disassembly of surrounding parts.
• Spacecraft Assembly: Utilized in environments demanding both strength and precision, ensuring reliable joints under vibration and load.
• General Engineering: Applicable where the aerospace-grade, high-strength, corrosion-resistant fastener is required, such as high-speed rail, defense, and marine industries.

The combination of protruding head design and pulltype installation enables ease of use in confined spaces while maintaining consistent performance in demanding operational conditions.

Related Standards

The following standards complement and are referenced within kSIST FprEN 6129:2026:

• EN 2424: Marking of aerospace products
• EN 4473: Aluminium pigmented coatings for fasteners - Technical specification
• SAE AMS2700: Passivation of corrosion-resistant steels
• SAE AMS5687 / AMS5690 / AMS5737: Material specifications for corrosion and heat-resistant alloys
• NASM8975: General specification for high-strength, installation-formed, blind fasteners
• SAE AS5272, MIL-PRF-46010, SAE AS87132, DOD-L-85645: Specifications for solid film lubricants and application methods
• ISO 8080 (mentioned in bibliography): Anodic treatment of titanium and titanium alloys

These related documents ensure that blind bolt fasteners manufactured and utilized under kSIST FprEN 6129:2026 are fully compatible with recognized international aerospace requirements and quality systems.

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Keywords: kSIST FprEN 6129, aerospace blind bolt, high strength fastener, pulltype, protruding head bolt, stainless steel fastener, aerospace series bolts, single-sided installation, fastener standard, SIST standards, aircraft assembly fastener.

SLOVENSKI STANDARD
oSIST prEN 6129:2024
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
oSIST prEN 6129:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 6129:2024
oSIST prEN 6129:2024
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.

oSIST prEN 6129:2024
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
oSIST prEN 6129:2024
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.
oSIST prEN 6129:2024
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/.
oSIST prEN 6129:2024
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
oSIST prEN 6129:2024
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
oSIST prEN 6129:2024
prEN 6129:2024 (E)
Key
1 grip
a
Blind side head may be installed on 7° max. slope.
Figure 2 — Typical installation
oSIST prEN 6129:2024
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)
...