Description
Overview:
The Spiral Pin 4x12 is a genuine Husqvarna fastening pin used to secure components within the chassis and assemblies of petrol chainsaws and power cutters. Made from hardened spring steel, the pin is designed to compress as it is driven into a matching bore, holding firmly under vibration and load. It is commonly used to locate levers, linkages, covers and other mating parts so they stay aligned and secure in service. Dimensions are 4 mm x 12 mm (0.16 inches x 0.47 inches). This genuine part suits a wide range of Husqvarna machines, including chainsaws such as the 288 and 40. OEM No. 721 42 52-50 (MPN 721425250) ensures the correct fit and specification for long-term reliability.
Key Features:
- Genuine Husqvarna part for assured fit and material quality (OEM No. 721 42 52-50, MPN 721425250)
- 4 mm x 12 mm (0.16 inches x 0.47 inches) for standard Husqvarna bores on listed models
- Hardened spring steel construction for high shear strength and wear resistance
- Coiled design provides constant radial pressure to resist loosening from vibration
- Accurate sizing for repeatable press-fit without damaging housings or shafts
- Corrosion-resistant finish to support outdoor and wet cutting environments
- Quick to install with a suitable drift or punch; no machining required
- Suitable for chainsaws and power cutters across multiple Husqvarna platforms
Typical Applications:
Used to secure and locate components such as linkages, guards, housings and drive-related parts in Husqvarna chainsaws and power cutters. Ideal when refurbishing worn assemblies, replacing missing or damaged pins, or during full strip-down and rebuild work to restore original alignment and fastening strength.
Also known as:
Coiled spring pin, elastic tension pin, split dowel pin, dowel spring pin, coiled roll pin, ISO-style spring pin, slotted spring pin (context dependent).
Fits Models:
242, 246, 266, 281, 288, 3120XP, 3130XP, 36, 394XP, 395XP, 40, 41, 42, 45, 49, 51, 55, 55 Rancher, 66, K6500, K6500 Ring, K6500Ring, K7000 Ring, K7000Ring, K950, K950 Ring, K960, K960 Ring, K960Ring, K970, K970 Ring, K970 Ring III, K970Ring, K970RingIII
Alternate Part Numbers:
721 42 52-50, 721425250
Product Specifications
| L&S Part No. | 721 42 52 50 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 721425250 |
| Unit of Sale | 1 |
| Applications | 242, 246, 266, 281, 288, 3120XP, 3130XP, 36, 394XP, 395XP, 40, 41, 42, 45, 49, 51, 55, 55 Rancher, 66, K6500, K6500 Ring, K6500Ring, K7000 Ring, K7000Ring, K950, K950 Ring, K960, K960 Ring, K960Ring, K970, K970 Ring, K970 Ring III, K970Ring, K970RingIII |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Fits Models | K6500 RING | K950 Ring | K960 Ring | K970 Ring | 242 | 246 | 266 | 281 | 288 | 3120XP | 36 | 394XP | 395XP | 40 | 41 | 42 | 45 | 49 | 51 | 55 | 55 RANCHER | 66 | K7000 Ring | K970 Ring III |
