Part number 862-438 is a thumb screw designed for tool‑free hand tightening and loosening on compatible PowrLiner, PowrTex, and PowrTwin equipment. This fastener features a knurled or winged head that allows operators to secure panels, covers, and components quickly without the need for tools, facilitating faster maintenance and adjustments. Replacing a worn, stripped, or missing thumb screw restores convenient access, ensures secure fastening, and improves serviceability.
| Part Number | 862-438 |
|---|---|
| Part Description | Thumb Screw |
| Brand | PowrLiner / PowrTex / PowrTwin |
| Fits | PowrLiner: 4000, 4900, 5000, 6000, 4900 XLT, 4950, 6900 XLT SP, 6900 XLT, 6950, 8900 XLT SP, 8900 XLT, 8900; PowrTex: 6900SF, 12000SV; PowrTwin: 12000 GHD, 12000 Plus DI, 12000 XLT DI, 12000 XLT, 12000 GH, 3500 50th Anniversary, 4500, 4900 XLT, 4900 GH, 6900 XLT DI, 6900 XLT, 6900 GH, 8900 GH, 8900, 4900, 6900, 12000 Plus, 8900 XLT, 12000 Plus DI |
| Condition | New |
The 862-438 Thumb Screw is a specialized fastener designed for applications requiring frequent access or adjustment on compatible PowrLiner, PowrTex, and PowrTwin equipment. Its knurled or winged head allows for easy hand tightening and loosening without the need for tools, making it ideal for securing access panels, covers, and quick‑release components.
Over time, thumb screws can become stripped, corroded, or damaged due to repeated use or exposure to chemicals. A worn or missing thumb screw can make component access difficult, compromise the security of panels, and slow down maintenance procedures. Replacing with the correct OEM thumb screw restores tool‑free convenience, ensures proper clamping force, and maintains efficient serviceability.
| Tool‑free operation | Allows hand tightening and loosening without tools |
|---|---|
| Component retention | Secures panels, covers, and other parts |
| Quick access | Facilitates faster maintenance and adjustments |
| Stripped threads | Screw no longer engages or tightens properly |
|---|---|
| Corrosion / rust | Visible corrosion that weakens the fastener |
| Grip damage | Knurling or wings are worn, making hand tightening difficult |
| Missing screw | Fastener absent, leaving components loose |
Part number 862-438 is compatible with the following equipment models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Brand / Series | Model | Component |
|---|---|---|
| PowrLiner | 4000 | Thumb Screw |
| 4900 | Thumb Screw | |
| 5000 | Thumb Screw | |
| 6000 | Thumb Screw | |
| 4900 XLT | Thumb Screw | |
| 4950 | Thumb Screw | |
| 6900 XLT SP | Thumb Screw | |
| 6900 XLT | Thumb Screw | |
| 6950 | Thumb Screw | |
| 8900 XLT SP | Thumb Screw | |
| 8900 XLT | Thumb Screw | |
| 8900 | Thumb Screw | |
| PowrTex | 6900SF | Thumb Screw |
| 12000SV | Thumb Screw | |
| PowrTwin | 12000 GHD | Thumb Screw |
| 12000 Plus DI | Thumb Screw | |
| 12000 XLT DI | Thumb Screw | |
| 12000 XLT | Thumb Screw | |
| 12000 GH | Thumb Screw | |
| 3500 50th Anniversary | Thumb Screw | |
| 4500 | Thumb Screw | |
| 4900 XLT | Thumb Screw | |
| 4900 GH | Thumb Screw | |
| 6900 XLT DI | Thumb Screw | |
| 6900 XLT | Thumb Screw | |
| 6900 GH | Thumb Screw | |
| 8900 GH | Thumb Screw | |
| 8900 | Thumb Screw | |
| 4900 | Thumb Screw | |
| 6900 | Thumb Screw | |
| 12000 Plus | Thumb Screw | |
| 8900 XLT | Thumb Screw | |
| 12000 Plus DI | Thumb Screw |
Thumb screw replacement may involve associated hardware. When servicing thumb screws, these components are commonly inspected or replaced at the same time.
Flat or lock washers used with the screw may be worn or corroded.
Mating threads in components can become damaged; inspect and repair as needed.
Ensure the parts being fastened are not cracked or deformed around mounting holes.
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