Grooved pins, also known as parallel grooved pins, are cylindrical fasteners with three equally spaced longitudinal grooves impressed along their exterior surface. Unlike solid dowel pins that rely on precision reamed holes, grooved pins create a non-positive locking fit through material displacement — when pressed into a drilled hole of nominal diameter, the displaced material from the grooves forms an expanded diameter that locks the pin securely in place. This unique design provides excellent vibration resistance while eliminating the need for precise hole tolerances.
Applicable Standards
| Standard | Description |
|---|---|
| ISO 8740 | Parallel grooved pins, with chamfer point — Full-length diamond grooves (most common type) |
| ISO 8741 | Reverse-taper grooved pins — Half-length progressive grooves |
| ISO 8744 | Taper grooved pins — Full-length progressive grooves |
| ISO 8745 | Taper grooved pins — Half-length progressive grooves |
| ISO 8746 | Grooved pins with round head |
| ISO 8747 | Grooved pins with countersunk head |
Materials
| Material | Properties | Typical Applications |
|---|---|---|
| Carbon Steel | High strength, general purpose; may be case-hardened | Standard industrial applications |
| Stainless Steel | Good corrosion resistance (A2/304, A4/316) | Medical, marine, food processing |
Surface Finishes
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Plain (as-formed)
-
Phosphate coating
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Zinc plating
Common Applications
| Industry | Specific Applications |
|---|---|
| Industrial Machinery | Gearbox assemblies, bearing retention, component positioning |
| Automotive | Transmission components, steering linkages, engine accessories |
| Agricultural Equipment | Implements, adjustable linkages, wear part replacement |
| Construction Machinery | Excavator components, loader linkages, attachment points |
| Electronic Equipment | Chassis assembly, component mounting |
| Power Tools | Gear retention, housing assembly |
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