The Graco 103961 Hex Head Cap Screw is a heavy-duty OEM bolt used for securing key pump components in Graco displacement assemblies. It ensures strong structural fastening and proper alignment of housing parts.
Use the list below as a guidance note. Always verify with your sprayer’s parts manual or serial-number lookup before ordering.
The Graco 103961 is a Hex Head Cap Screw (HD) used as a structural fastener/tie-bolt in select Graco pump assemblies. In referenced Graco documentation, it appears as 3/8-16 UNC-2A × 9 in (229 mm)—commonly securing major pump housings together. Check your model’s parts diagram to confirm this exact bolt length and thread specification.
| Part Number | 103961 |
|---|---|
| Description | Hex Head Cap Screw, HD (Screw, Cap, Hex Hd, Heavy-Duty) |
| Thread | 3/8-16 UNC-2A (coarse) |
| Length | 9 in (≈229 mm) (as referenced in Graco pump documentation; verify for your model) |
| Head Type | Hex Head |
| Typical Use | Structural fastening / tie-bolt for pump housings and intake/outlet bodies in select Graco displacement pumps |
| Category | OEM Graco replacement fastener |
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