Part 9805352 is a shoulder screw (3/8 x 5/8) used as a pivot or mounting fastener on Impact 1640, 1140, 740, 840, and I/IA model sprayers. The precision shoulder provides a smooth bearing surface for rotating components, ensuring proper alignment and consistent operation. Replacing a worn, stripped, or damaged shoulder screw restores original fit and prevents premature wear of connected parts.
| Part Number | 9805352 |
|---|---|
| Part Description | Shoulder Screw 3/8 x 5/8 |
| Brand | Impact |
| Fits | Impact 1640, 1140, 740, 840, 1140 I and IA, 840 I and IA |
| Condition | New |
The 9805352 Shoulder Screw is a precision fastener with a 3/8‑inch diameter shoulder and 5/8‑inch shoulder length. It is designed to serve as a pivot point or mounting fastener in Impact 1640, 1140, 740, 840, and I/IA model sprayers. The unthreaded shoulder provides a smooth bearing surface, allowing attached components to rotate or align without binding.
Over time, shoulder screws can become worn, bent, or stripped, leading to play in pivot points, misalignment, or loosening of critical assemblies. A damaged shoulder screw compromises the precision movement of linkage arms, pump mounts, or control mechanisms. Replacing it with this genuine OEM part restores original fit, eliminates slop, and ensures reliable operation.
| Pivot point | Provides a smooth bearing surface for rotating components |
|---|---|
| Alignment | Maintains precise positioning of linkages and mounts |
| Load distribution | Transmits forces without damaging mating parts |
| Worn shoulder | Visible scoring, galling, or reduced diameter |
|---|---|
| Bent / damaged | Screw is not straight or shows signs of impact |
| Stripped threads | Fastener cannot be torqued properly |
| Excessive play | Connected components feel loose or sloppy |
Part 9805352 is compatible with the following Impact sprayer models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Model | Component |
|---|---|
| Impact 1640 | Shoulder Screw 3/8 x 5/8 |
| Impact 1140 | Shoulder Screw 3/8 x 5/8 |
| Impact 740 | Shoulder Screw 3/8 x 5/8 |
| Impact 840 | Shoulder Screw 3/8 x 5/8 |
| Impact 1140 I | Shoulder Screw 3/8 x 5/8 |
| Impact 1140 IA | Shoulder Screw 3/8 x 5/8 |
| Impact 840 I | Shoulder Screw 3/8 x 5/8 |
| Impact 840 IA | Shoulder Screw 3/8 x 5/8 |
When replacing a shoulder screw, it is common to inspect or replace the associated components that rely on it for proper function.
The shoulder rides against a bushing or bearing; inspect for wear and replace if necessary.
Check the arm for elongation of the mounting hole or cracks.
Replace any locking hardware to ensure the screw stays properly torqued.
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