NP
Contact us You can contact us using any of the methods below. Unit 3 Durham Lane Armthorpe Doncaster South Yorkshire DN3 3FE England +44 (0)1302 836010 +44 (0)1302 836012 sales@npfasteners.com
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NORTHERN PRECISION LTD
Accreditations Northern Precision Ltd operate a quality management system in accordance with ISO 9001. The ISO 9001 standard is recognised worldwide and you can be assured of the benefits of working with a certified company knowing that our management systems are constantly assessed and improved.
Registered in England & Wales Company number 3275391
V.A.T Registration number GB 684 1384 17
NP
NORTHERN PRECISION LTD
Specialist Fasteners for Sheet Metal
+44 (0) 1302 836010
+44 (0) 1302 836012
Tel:
Fax:
sales@npfasteners.com
Quality
Service
Reliability
Northern Precision Ltd YouTube Channel
Sleeved Anvil
Un-Headed Crown-Nut Installation 1) Fabricate a punch appropriate for the type of Crown-Nut and the depth of installation required. 2) Ensure that the receiving tube is firmly secured. 3)    Place   the   Crown-Nut    inside   the   punch,   making   sure   that   the   crowns   are   orientated   correctly, (bent towards the punch, as shown). 4)    Place   the   Crown-Nut    and   punch   assembly   on   the   head   of   the   tube,   ensuring   that   the   crowns   are orientated   correctly   (square   to   the   tube   walls).   It   is   important   that   the   end   of   the   tube   is   a   uniform shape   and   cut   perpendicular   to   the   side   of   the   tube,   as   any   cutting   errors   will   be   detrimental   to   the fit and function of the Crown-Nut . 5) Gradually apply pressure until the end of the run and the punch bottoms out. 6) Remove the punch.
d1 d3 L d2 5 d3 1 - 0.1 L 10 5 d2 d1 + 0.2 Tube Insert Punch
Material & Finish
Electro Zinc Plated Steel
Part Number Examples
ITT2S M6 19.5 2 crowns round type CROWN-NUT with an M6 thread, suitable for round tube section with an internal dimension ranging from 19.5mm to 20.9mm ITT2S M10 26.0 2 crowns round type CROWN-NUT with an M10 thread, suitable for round tube section with an internal dimension ranging from 26.0mm to 28.0mm
RoHS REACH COMPLIANT
Dimensional
Part Number
d3 (Crown A/F)
I/D (Int. Box Section Size)
L (Total Length)
Non-binding dimensions in mm. It is advisable to carry out preliminary assembly tests to determine the size that gives optimal performance in your application.  
Application & Installation
Ideal for applications subject to pull forces. Not suitable for push loads. Not having a head allows fitting of the Crown-nut insert inside the tube section at your own defined depth. Press fit: gradually increase pressure on the insert until the required depth is reached. It is highly recommended that a sleeved punch is used to ensure the insert is installed squarely and at the correct depth (see below).
d1 (Thread)
M6
18.3
19.3
21.6
24.3
29.2
18.0
21.4
24.3
29.1
37.4
15.7 - 17.1
17.6 - 18.1
18.9 - 20.2
22.1 - 23.4
26.0 - 28.0
15.7 - 17.1
18.9 - 20.2
22.1 - 23.4
26.0 - 28.0
34.8 - 36.1
11
10
10
14.2
12
15
14
13.8
16.2
17.3
ITQ2S  M6 15.7
ITQ2S M6 17.6
ITQ2S M6 18.9
ITQ2S M6 22.1
ITQ2S M6 26.0
ITQ2S M8 15.7
ITQ2S M8 18.9
ITQ2S M8 22.1
ITQ2S M8 26.0
ITQ2S M8 34.8
M8
Info
An Insert for use inside the end of square section The Crown-nut is a revolutionary solution for the creation of a strong reusable female thread at the end of round or square section tubes. Crown-nut solves the issue of how to securely fix to the end of square section, guaranteeing superior torque-out and pull-out performance. The product range offers solutions for round tube and square section and is available in a wide range of sizes. A version is also available that is designed to accept push-fit castors. Advantages of the Crown-nut Can be installed into square section with a wide internal size tolerance range. Thanks to the flexibility of the crown design, the same item code can be used for a range internal sizes. The crown is designed so that the shape of the tube section is not altered during installation, guaranteeing the aesthetics of the external surface. Crown-nuts are easy to install and are cost effective. The press-in fit is fast and easy, enabling the elimination of traditional and costly assembly processes such as welding and staking. Note After the insertion of the Crown Nut avoid heat treatments, galvanization and other heating operations that could compromise the characteristics of the product.
Type ITQ2S
CROWN-NUT SQUARE
D3 I/D d1 L