The Husqvarna 721680251 Spring Cotter is a genuine OEM component designed for a wide range of Husqvarna PG and HTC floor grinders, DC6000 and DC6000I dust collectors, and KV power cutter carts. As an authentic Husqvarna part, it is manufactured to the exact specifications required to maintain secure, reliable retention of pins and shafts across these machines. This Spring Cotter fits models including the PG280, PG400, PG450, PG540, PG680, PG680RC, PG690, PG690P, PG690RC, PG820, PG820RC, PG830, PG830RC, PG830S, PG5, PG510, PG510I, HTC280, HTC450, HTC510, KV03, KV03MKII, DC6000, and DC6000I — cross-reference part number 721680251 against your parts diagram to confirm the correct application. DHS Equipment supplies this part to help keep your equipment running at full capacity.
Key Features
- Genuine OEM Spring Retention — manufactured to Husqvarna's exact material temper and dimensional spec, ensuring the cotter delivers consistent spring tension and secure locking action in service.
- Drop-In Installation — engineered to the original pin diameter and loop geometry, so this cotter seats and locks without reworking the surrounding hardware.
- Broad Cross-Model Fitment — compatible with the PG and HTC floor grinder lines, DC6000 and DC6000I dust collectors, and KV03 and KV03MKII power cutter carts, covering one of the widest fitment ranges in the Husqvarna Construction catalog.
- Prevents Component Displacement — a correctly seated spring cotter locks pins and fasteners in place under vibration and load; a worn or missing cotter allows hardware to back out, leading to assembly loosening and potential component damage.
A spring cotter — also called a cotter pin or hairpin clip — is a small but critical locking fastener used to secure clevis pins, pivot pins, and shaft-end hardware in mechanical assemblies. It works by threading through a drilled hole and springing open on the far side, preventing the host pin from withdrawing under vibration or dynamic load. In heavy-use equipment like floor grinders and dust collectors, the constant machine vibration places repeated stress on every fastener in the assembly; a fatigued or missing spring cotter allows the associated pin to walk free, which can cause linkage slop, component misalignment, or sudden disassembly of the retained hardware.
Part Details
| Part Number | 721680251 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Spring Cotter |
Compatibility & Fitment
| Name | Model |
|---|---|
| Dust & Slurry Equipment | DC6000I |
| Floor Grinder | HTC280 |
| Floor Grinder | HTC510 |
| Floor Grinder | PG400 |
| Floor Grinder | PG450 |
| Floor Grinder | PG540 |
| Floor Grinder | PG680 |
| Floor Grinder | PG690RC |
| Floor Grinder | PG820 |
| Floor Grinder | PG820RC |
| Floor Grinder | PG830 |
| Floor Grinder | PG830RC |
| Floor Grinder | PG830S |
| Floor Grinder | PG5 |
| Floor Grinder | PG510 |
| Floor Grinder | PG680RC |
| Floor Grinder | PG690P |
| Power Cutter | KV03MKII |
| Power Cutter | KV03 |
| Dust & Slurry Equipment | DC6000 |
| Floor Grinder | PG280 |
| Floor Grinder | PG690 |
| Floor Grinder | HTC450 |
| Floor Grinder | PG510I |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
