Mainspring for FHF 378

Height, diameter, thickness and length

1.40 × 7.5 × 0.085 × 260 mmheight × diameter × thickness × length

Note: We have transcribed this information to the best of our knowledge from the Générale Ressorts mainspring catalogue (GR 2, 1974). All information has been carefully checked but is provided without guarantee. Please check yourself before fitting that the mainspring fits, in particular height, diameter, thickness and length.

📏 Mainspring dimensions

GR no.	Height	Diameter	Thickness	Length	Type
3615	1.40 mm	7.5 mm	0.085 mm	260 mm	Hand-wound, normal end hook

All dimensions in millimetres. The height of a mainspring is often also called its “width”. Source: Générale Ressorts, mainspring catalogue GR 2 (March 1974), page 85.

🛒 Matching mainspring in our shop

Mainspring 1,40x6,5x0,085x26011,90 € incl. VAT *View item

Only mainsprings with exactly the same height, thickness and length are shown; the diameter is equal or up to 1 mm smaller – a smaller spring settles in the barrel.

🔄 Alternative mainsprings

Mainspring 1,40-7,5-0,08-28010,90 € incl. VAT *View item

Mainspring 1,4-7,5-0,08-27010,90 € incl. VAT *View item

Mainspring 1,40-7,5-0,09-2408,99 € incl. VAT *View item

Mainspring 1,40-7,5-0,09-24010,90 € incl. VAT *View item

Same height, diameter equal or slightly smaller. Please check yourself before ordering.

🔧 Interchangeable spare parts

Which other spare parts of FHF 378 fit other calibers:

Interchangeability FHF 378

🔗 According to the catalogue, the same mainspring (GR 3615) also fits

📄 Technical document

View the original document for FHF 378 online:

FHF 37-374-378 – Ø 19.40 mm

❓ Frequently asked questions

Which mainspring fits the FHF 378?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.40 × 7.5 × 0.085 × 260 mm (GR 3615, hand-wound, normal end hook).