Printable Gas Strut Sizing Chart

Printable Gas Strut Sizing Chart

A one-page cheat-sheet for typical force (N) ranges and end fitting sizes — handy to keep in the workshop or share with a mate who's not sure what to order. Click the button below to print it or save it as a PDF from your browser's print dialog.

Typical Force (N) Ranges by Application

Application Typical range Notes
Kitchen cabinet door ~100N Soft-close, per strut
Toolbox / van lid 60N–140N Small-to-medium lids
Motorhome / caravan hab door, locker ~150N–400N Varies a lot by size — calculate to confirm
Car bonnet / tailgate 250N–850N Vehicle-specific — match by make & model, not force alone
Ottoman / storage bed 600N–1200N Usually fitted as a pair
Gate (hydraulic closer) ~300N Self-closing arm sets

End Fitting Size Reference

Fitting type Thread Ball / bore size Standard
Ball stud (male) M6 / M8 10mm ball DIN 71803
Ball stud (male) M8 13mm ball DIN 71803
Ball stud (male, heavy duty) M10 16mm ball DIN 71803
Ball joint / socket (female) M6 / M8 10mm socket DIN 71802
Ball joint / socket (female) M8 13mm socket DIN 71802
Ball joint / socket (female) M10 16mm socket DIN 71802
Clevis fork end M6 / M8 / M10 — DIN 71752
Eyelet end fitting M6 / M8 / M10 — —

The Formula (for reference)

F = (W × 9.81 × L) / d

F = force per strut (N) · W = panel weight (kg) · L = hinge-to-centre-of-gravity distance · d = hinge-to-strut-mount distance. Multiply by a safety margin of 1.2–1.5×, then divide by the number of struts fitted.

springfixuk.com · Orders placed before 16:00, Monday to Sunday, are dispatched the same day via Royal Mail or Evri.

Prefer to work it out for your exact panel? Use the Force Calculator, browse the full Ball Stud & Clevis End Size Chart, or try the Fitting & Bracket Finder.