Skip to main content

Extension springs with turnable bolt

Our series of extension springs features an advanced design that both ensures a specific tensile force when extended to a precise length but also maximizes the use of the extension spring's full potential without the risk of breaking. This specially developed model with a turnable bolt is perfect for efficiently utilizing the extension spring's extendable length (Ln). Our extension springs with turnable bolts can either be mounted directly into a threaded hole or equipped with a custom end fitting, providing flexibility and adaptability across various applications.

Measurements between2.5 - 6 mm

Measurements between17 - 50 mm

Measurements between85 - 310 mm

Measurements between0.49 - 30 N/mm

Measurements between128 - 619 mm

Measurements between208 - 1611 N

108 itemsd (mm)Do (mm)L0 (mm)d2R (N/mm)Ln (mm)Fn (N)
Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6439

ESTB 2.5X17X85

103 in stock

2.5

17

85

M6

5.9

128

288

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6440

ESTB 2.5X17X115

10 in stock

2.5

17

115

M6

3.8

182

289

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6443

ESTB 2.5X17X145

10 in stock

2.5

17

145

M6

2.8

235

286

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6444

ESTB 2.5X17X175

5 in stock

2.5

17

175

M6

2.3

289

296

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6445

ESTB 2.5X17X205

15 in stock

2.5

17

205

M6

1.9

342

294

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6446

ESTB 2.5X17X235

65 in stock

2.5

17

235

M6

1.6

396

292

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6447

ESTB 2.5X20X85

7 in stock

2.5

20

85

M6

3.4

150

250

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6448

ESTB 2.5X20X115

10 in stock

2.5

20

115

M6

2.2

216

251

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6449

ESTB 2.5X20X145

15 in stock

2.5

20

145

M6

1.6

282

248

Extension springs with turnable bolt — a helical steel extension spring with a turnable bolt hook at one end
6450

ESTB 2.5X20X175

6 in stock

2.5

20

175

M6

1.3

347

253

Displaying 10 of 108