prEN 4892

SLOVENSKI STANDARD
01-maj-2022
Aeronavtika - Sornik, zunanji spiralni pogon, s šestrobo glavo, natezna in strižna
uporaba
Aerospace series - Bolt, External Spiral Drive, flange head, tension and shear application
Luft- und Raumfahrt - Verbindungselement mit Außengewinde und Spiral-Antrieb
Série aérospatiale - Vis, entraînement extérieur en spirale, tête-embase, application de
traction-cisaillement
Ta slovenski standard je istoveten z: prEN 4892
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
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
March 2022
ICS
English Version
Aerospace series - Bolt, External Spiral Drive, flange head,
tension and shear application
Série aérospatiale - Vis, entraînement extérieur en Luft- und Raumfahrt - Verbindungselement mit
spirale, tête-embase, application de traction- Außengewinde und Spiral-Antrieb
cisaillement
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, Turkey 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 4892:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Requirements . 6
4.1 Configuration, dimensions, tolerances. 6
4.1.1 General . 6
4.1.2 Grip lengths for bolts without hole in threads . 10
4.1.3 Grip lengths for bolts requiring double locking with hole in threads (codes C, D, HC
and HD) . 13
4.1.4 Concentricity . 15
4.1.5 Surface texture . 15
4.2 Mechanical properties . 16
4.3 Mass . 17
4.4 Material and surface treatment . 18
4.5 Specific requirements . 19
4.6 Bolt geometry . 19
4.7 Oversizes . 19
4.7.1 First oversize . 19
4.7.2 Second oversize . 20
5 Designation. 21
6 Marking . 21
7 Technical specification . 21
Bibliography . 22

European foreword
This document (prEN 4892:2022) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (ASD-STAN).
This document is currently submitted to the CEN Enquiry.
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.
Introduction
Aerospace and Defence Standardization (ASD-STAN) draws attention to the fact that it is claimed that
compliance with this document may involve the use of a patent “Spiral Drive System for Threaded
Fasteners” EP1025370B1.
ASD-STAN takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has ensured ASD-STAN that he/she is willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this
respect, the statement of the holder of this patent right is registered with ASD-STAN. Information may
be obtained from:
The Phillips Screw Company
301 Edgewater Drive, Suite 320
Wakefield, Massachusetts, 01880
USA
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. ASD-STAN shall not be held responsible for identifying
any or all such patent rights.
1 Scope
This document specifies the dimensions, tolerances, configuration and mass of a bolt, External Spiral
Drive, flange head for use in tension and shear application for use in aerospace applications.
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
EN 4852, Aerospace series - External spiral drive heads for threaded fasteners - Geometrical definition and
fastener head wrenching configuration
EN 6117, Aerospace series — Specification for lubrication of fasteners with cetyl alcohol
EN 6118, Aerospace series — Process specification — Aluminium base protection for fasteners
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 3161, Aerospace — UNJ threads — General requirements and limit dimensions
ASME B46.1, Surface Texture (Surface Roughness, Waviness, and Lay)
NAS4008, Fasteners, Corrosion Resistant Nickel Alloy 718, External Threaded, 220 KSI Ftu, 125 KSI Fsu,
900 °F
SAE AMS2700F, Passivation of Corrosion Resistant Steels
SAE AMS5662N, Nickel Alloy, Corrosion and Heat-Resistant, Bars, Forgings, and Rings 52.5Ni – 19Cr –
3.0Mo – 5.1Cb (Nb) – 0.90Ti – 0.50Al – 18Fe Consumable Electrode or Vacuum Induction Melted
1 775 °F (968 °C) Solution Heat Treated, Precipitation-Hardenable
SAE AMS5842G, Cobalt-Nickel Alloy, Corrosion and Heat-Resistant, Bars 19Cr – 36Co – 25Ni – 7.0Mo –
0.50Cb (Nb) – 2.9Ti – 0.20Al – 9.0Fe Vacuum Induction Plus Vacuum Consumable Electrode Melted
Solution Heat Treated and Work Strengthened
SAE AMS5962A, Nickel Alloy, Corrosion and Heat-Resistant, Round Bars and Wire 52.5Ni – 19Cr –
3.0Mo – 5.1Cb – 0.90Ti – 0.50Al – 18Fe Consumable Electrode or Vacuum Induction Melted 1 775 °F
(968 °C) Solution Treated and Work Strengthened Precipitation Hardenable
SAE AS1701F, Lubricant, Solid Film

1 Published as ASD-STAN Prestandard at the date of publication of this standard by AeroSpace and Defence
Industries Association of Europe – Standardization (ASD-STAN) (www.asd-stan.org).
2 Published by American Society of Mechanical Engineers (ASME), available at: https://www.asme.org/.
3 Published by Aerospace Industries Association (AIA), available at: https://www.aia-aerospace.org/.
4 Published by Society of Automotive Engineers (SAE), available at: https://www.sae.org/.
SAE AS7475E, Bolts, Cobalt-Chromium-Nickel Alloy, UNS R30159, Tensile Strength 260 ksi,
Procurement Specification
SAE AS8879D, Screw Threads — UNJ Profile, Inch Controlled Radius Root with Increased Minor
Diameter
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Requirements
4.1 Configuration, dimensions, tolerances
4.1.1 General
Configuration shall be according to Figure 1.
Dimensions shall be according to Figure 1, Table 1, Table 2, Table 3, Table 9 and Table 10.
Dimensions are defined after surface treatment and before lubricant application.
Break sharp edges after drilling hole into thread or bolt head, required by specific code indicated in
Table 2.
Tolerances not specified shall be according to ISO 2768-1.
Dimensions in millimetres
a) X (for specific code see Table 2 [codes C, D, HC and HD])

b) Y for A and D code (for specific code see Table 2 [codes H, HD and HC])
a d
Marking see section 5. 4 holes with ⌀ F in specified.
b e
2 imperfect threads max. Drill 2 holes diameter P when C, D, HC or HD specific code is requested.
c f
Radius here formed by Die profile. Yellow paint for thread drill hole location when C or HC specific code is
requested.
Figure 1 — Bolt configuration
Table 1 — Dimensions
Dimensions in millimetres
Diameter code No. 4 5 6 7 8 9 10 12 14 16 18 19 20 22
.2500– .3125– .3750– .4375– .5000– .5625– .6250– .7500– .8750– 1.0000– 1.1250– 1.1875– 1.2500– 1.3750–
Thread according to
28UNJF 24UNJF 24UNJF 20UNJF 20UNJF 18UNJF 18UNJF 16UNJF 14UNJF 12UNJF- 12UNJF- 12UNJF- 12UNJF- 12UNJF-
ISO 3161
-3A -3A -3A -3A -3A -3A -3A -3A -3A 3A 3A 3A 3A 3A
Nominal shank
6,35 7,94 9,52 11,11 12,7 14,29 15,88 19,05 22,22 25,4 28,58 30,17 31,75 34,92
diameter
min. 10,87 13,233 16,23 18,796 20,777 23,571 26,416 30,988 36,271 41,021 47,371 53,721 54,93 59,563
⌀ A
max. 11,125 13,487 16,484 19,05 21,031 23,825 26,67 31,242 36,525 41,275 47,625 53,975 55,18 59,817
min. 6,92 8,27 9,59 11,01 12,47 13,83 16,67 19,81 20,74 22,11 24,91 27,62 29,05 30,42
⌀ B
max. 7,3 8,651 9,971 11,391 12,851 14,211 17,051 20,191 21,121 22,491 25,291 28,001 29,431 30,801
min. 6,312 7,899 9,487 11,074 12,661 14,236 15,824 18,999 22,174 25,349 28,512 30,099 31,689 34,862
⌀ D
max. 6,337 7,925 9,512 11,099 12,687 14,262 15,849 19,024 22,199 25,374 28,55 30,137 31,714 34,9
min. 6,121 7,67 9,245 10,82 12,395 13,97 15,545 18,72 21,869 25,044 28,194 29,781 31,232 34,382
⌀ T (Major
D
dia.)
max. 6,197 7,772 9,347 10,947 12,522 14,097 15,697 18,87
...