Hello,
I would like to recommend you the following component:

E-Chain® - snap-open along outer radius

4.002 m 2500.07.055.0 (3,-,0,0,0,87,-3737,PZB,PZB,A2,2070.4PZBA2,2070.3PZBA2)

Get the free app for 3D CAD models!
The app from igus® offers you access to 3D-CAD files for igus® products.
With this free app you can view 3D CAD models with your mobile device and have the CAD model sent to you
by e-mail in the preferred CAD format.

A Link to the free app is available at http://www.igus.de/CADapp

If you do not have a smartphone / tablet you can view the recommended component via internet and download it directly onto your computer:
https://igus.partcommunity.com/portal/portal/igus/CAD+CATALOGS?info=igus/e_ketten/e_ketten_e2_000_medium/serie_2500/series_2500_asmtab.prj&varset=%7Bigus/e_ketten/e_ketten_e2_000_medium/serie_2500/series_2500_asmtab.prj%7D,%7BNB=4.002%20m%202500.07.055.0%20(3,-,0,0,0,87,-3737,PZB,PZB,A2,2070.4PZBA2,2070.3PZBA2)%7D,%7BINFO=INFO%7D,%7BSIZE=07%7D,%7BBI=77%7D,%7BBA=93%7D,%7BR=55%7D,%7BEBA=1%7D,%7BLK=3%7D,%7BFPMVW=-%7D,%7BDELTAM=0%7D,%7BS=0%7D,%7BGEWLK=0%7D,%7BAKG=87%7D,%7BPM=-3737.0%7D,%7BFARBE=0%7D,%7BXXL=%7D,%7BESD=%7D,%7BNC=%7D,%7BAM=1%7D,%7BAMAUS=PZB%7D,%7BAF=1%7D,%7BAFAUS=PZB%7D,%7BBV=A2%7D,%7BCNSMASSEXACT1=1.01%7D,%7BT=46.000%7D,%7BKGH=35.000%7D,%7BA=17.500%7D,%7BBINDEX=070%7D,%7BPPATH=assemblies/series_2500_asmtpl.prj%7D.
Have fun!