oSIST prEN 6127:2024

Aerospace series - Blind bolt, 100° reduced flush head, high strength

This document specifies the configuration, dimensions, tolerances and mass of a stainless steel blind bolt with 100° reduced flush head for aerospace application.

Luft- und Raumfahrt - Blindbolzen, 100° reduzierter Senkkopf, hochfest

Série aérospatiale - Boulon aveugle, tête fraisée réduite 100°, haute résistance

Le présent document spécifie la configuration, les dimensions, les tolérances et la masse d’un boulon aveugle en acier inoxydable, à tête fraisée réduite 100°, pour les applications aérospatiales.

Aeronavtika - Slepa kovica, 100° zmanjšana ugrezna glava, visoka trdnost

General Information

• Status: Not Published
• Public Enquiry End Date: 15-Oct-2024
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 07-Aug-2024
• Due Date: 25-Dec-2024
• Completion Date: 18-Oct-2024
• Ref Project: prEN 6127 - Aerospace series - Blind bolt, 100° reduced flush head, high strength

Overview

The oSIST prEN 6127:2024:2024 standard, developed by CEN and ASD-STAN, defines the specifications for aerospace-grade blind bolts with a 100° reduced flush head and high strength properties. This stainless steel blind bolt is designed specifically for aerospace applications, ensuring optimized performance, reliability, and safety in critical fastening scenarios. The document details the configuration, dimensions, tolerances, grip ranges, mass, materials, finishes, lubrication, and oversize options for these specialized blind bolts.

Key Topics

• Configuration and Dimensions
  The standard clearly specifies the bolt's exact configuration including the 100° reduced flush head design, serrated pin geometry, and sleeve details. Precise dimensional data with tolerances are provided to guarantee interchangeability and fit for aerospace assemblies.

• Material and Finish
  Blind bolts covered by this standard are manufactured using high-strength stainless steel materials such as A-286 corrosion-resistant steel (CRES) and optionally Inconel 600. Finish types include passivated coatings per SAE AMS2700 and resin-based aluminum pigmented coatings for corrosion resistance and durability in aerospace environments.

• Grip Range and Mass
  Detailed tables outline grip length ranges and corresponding mass values for bolts of diameter codes 05, 06, and 08. This ensures proper selection for differing panel thicknesses and weight considerations in aerospace structures.

• Lubrication and Installation
  Recommendations for lubrication include options like solid film and molecular bonded dry film lubricants conforming to SAE and MIL specifications. These promote smooth installation while enhancing corrosion protection and durability.

• Performance Requirements
  The standard stipulates static strength, tensile preload, and spindle retention values to assure mechanical reliability under aerospace operational loads.

• Oversize Options
  First oversize bolt dimensions and grip ranges are additionally specified, allowing for alternative installation scenarios or rework situations where hole oversizing may occur.

Applications

The oSIST prEN 6127:2024 blind bolts are specially designed for aerospace manufacturing and maintenance applications, where high-strength, durable, and lightweight fastening solutions are essential. Typical uses include:

• Assembly of aircraft structural components
• Fastening of aerospace panels and skins requiring flush surface finish
• Situations requiring blind installation where access is only available from one side
• Maintenance and repair tasks with options for oversize bolts to address worn or damaged holes
• Environments demanding corrosion resistance and heat tolerance in line with aerospace standards

These blind bolts contribute to increased structural integrity, reduced weight, and improved service life of aerospace assemblies.

Related Standards

• EN 2424 – Aerospace Series: Marking of Aerospace Products
• EN 4473 – Aerospace Series: Aluminium Pigmented Coatings for Fasteners
• SAE AMS2700 – Passivation of Corrosion Resistant Steels
• MIL-PRF-46010 – Dry Film Lubricants for Military Aerospace Hardware
• NASM8975 – Fasteners, Blind, High Strength Installation-Formed
• SAE AMS5690 / AMS5737 – Corrosion and Heat-Resistant Steel Specifications
• SAE AS5272 / AS87132 – Lubricants and Surface Treatments for Aero Fasteners

These complementary standards cover material properties, surface treatment, lubrication, and marking protocols ensuring comprehensive aerospace fastener reliability.

---

This standard is an essential reference for aerospace engineers, quality assurance specialists, and fastener manufacturers aiming to comply with industry best practices for blind bolt fastening solutions. The precise dimensions, high-strength materials, and stringent performance requirements make oSIST prEN 6127:2024 critical for advancing aerospace assembly integrity and safety.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2024
Aeronavtika - Slepa kovica, 100° zmanjšana ugrezna glava, visoka trdnost
Aerospace series - Blind bolt, 100° reduced flush head, high strength
Luft- und Raumfahrt - Blindbolzen, 100° reduzierter Senkkopf, hochfest
Série aérospatiale - Boulon aveugle, tête fraisée réduite 100°, haute résistance
Ta slovenski standard je istoveten z: prEN 6127
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
English Version
Aerospace series - Blind bolt, 100° reduced flush head,
high strength
Série aérospatiale - Boulon aveugle, tête fraisée réduite Luft- und Raumfahrt - Blindbolzen, 100° reduzierter
100°, haute résistance Senkkopf, hochfest
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 6127:2024 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 and tolerances . 5
4.2 Grip range and mass . 5
4.3 Material, finish and lubrication . 5
4.4 First oversize . 5
5 Designation . 17
6 Marking . 17
7 Technical specification . 17
European foreword
This document (prEN 6127:2024) 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 ASD-STAN prEN 6127:2006.
This document includes the following significant technical changes with respect to ASD-
STAN prEN 6127:2006:
a) Figure 1 and Figure 2 updated (dimensions Q and X removed);
b) dimension Q removed in Table 1 accordingly;
c) Table 1 and Table 3: Single values corrected and hole limits removed;
d) Table 5 and Table 6 updated according updated normative references and preferred options;
e) oversize “X” added in document.
1 Scope
This document specifies the configuration, dimensions, tolerances and mass of a stainless steel blind bolt
with 100° reduced flush 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-12Ni-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 and tolerances
The configuration, dimensions, tolerances, static strength, tensile preload and spindle retention shall
conform to Figure 1, Figure 2 and 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.
4.4 First oversize
First oversize shall be according to Table 7, Table 8 and Table 9.

a) Bolt configuration
b) Serrated pin geometry
Key
1 marking see Clause 6 5 grip
2 serrated pin 6 sleeve
3 locking collar 7 shifting anvil
4 crown height (C) 8 drive washer
a
Diameter of 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 and 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
Theor. 7,37 9,07 12,19
⌀A
(0,290) (0,357) (0,480)
Ref.
1,32 1,65 2,31
B Ref.
(0,052) (0,065) (0,091)
0,25 0,25 0,31
C max.
(0,010) (0,010) (0,012)
0,584 0,762 1,016
0,508 0,686 0,914
H Gage HT
(0,023 0) (0,030 0) (0,040 0)
(0,020 0) (0,027 0) (0,036 0)
5,946 7,216 9,792
5,941 7,211 9,787
⌀W Gage Dia.
(0,234 1) (0,284 1) (0,385 5)
(0,233 9) (0,283 9) (0,385 3)
±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) (0,375) (0,375)
±1,52 3,56 4,06 4,83
N
(±0,060) (0,140) (0,160) (0,190)
3,05 3,81 4,83
⌀D max.
(0,120) (0,150) (0,190)
2,16 2,79 3,66
⌀D max.
(0,085) (0,110) (0,144)
7,62 8,13 9,40
b
P max.
(0,300) (0,320) (0,370)
5,66 6,86 9,02
⌀P min.
(0,223) (0,270) (0,355)
0,25 0,38 0,51
R max.
(0,010) (0,015) (0,020)
5,89 7,42 9,17
S max.
(0,232) (0,292) (0,361)
±0,76 20,32 21,08 24,77
J
(±0,030) (0,800) (0,830) (0,975)
Diameter code
05 06 08
Number of
serrations
J 18 19 20
min.
±0,76 1,52 1,78 2,29
X
(±0,030) (0,060) (0,070) (0,090)
0,13 0,13 0,13
E min.
(0,005) (0,005) (0,005)
0,33 0,33 0,33
C Ref.
(0,013) (0,013) (0,013)
±0,05 0,81 0,81 0,81
C
(±0,002) (0,032) (0,032) (0,032)
F ±5° 45° 45° 45°
G ±5° 30° 30° 30°
a
Diameter code 05 is also available with reduced diameter shifting anvil/drive washer [7,93 mm ± 0,13 mm
(0,312 inch ± 0,005 inch)]. See part number examples.
b
In the length of P, ⌀D may be 0,05 mm (0,002 inch) undersize.
Table 2 — Static strength (installed), tensile preload, spindle retention
Dimensions in kN (lbf)
Diameter code Single shear Tensile Tensile preload Spindle retention
strength strength
min. min. min. min.
8,807 4,671 0,467 2,335
(1 980) (1 050) (105) (525)
13,011 6,672 0,667 3,336
(2 925) (1 500) (150) (750)
22,242 11,565 1,157 5,783
(5 000) (2 600) (260) (1 300)
Table 3 — Grip range
Dimensions in mm (inch)
Grip Under lap Grip range Over Diameter code
length lap
05 06 08
code
min. min. min. max. max. L K L K L K
only 06 dia.   05 dia. Ref. max. Ref. max. Ref. max.
05 dia. to 08 to 08
dia. dia.
a
2,39 3,99 4,39 8,53 12,09 9,02 13,23
02 — — — —
(0,094) (0,157) (0,173) (0,336) (0,476) (0,355) (0,521)
b
3,71 3,56 3,96 5,59 5,99 10,11 13,69 10,59 14,83 12,17 16,38
(0,146) (0,140) (0,156) (0,220) (0,236) (0,398) (0,539) (0,417) (0,584) (0,479) (0,645)
5,31 5,16 5,56 7,16 7,57 11,68 15,29 12,19 16,43 13,74 17,98
(0,209) (0,203) (0,219) (0,282
...