

The Graco 100680 Screw Cap Hex HD is a genuine OEM fastener designed for use in multiple Graco ThermoLazer and ProMelt models. It ensures secure assembly and long-lasting performance.
The Graco 100680 is an OEM Screw, Cap, Hex Head (Hex HD) used on select Graco pavement marking and thermoplastic units. It’s a standard 3/8-16 hex cap screw commonly referenced in Graco service parts lists.
This part appears in Graco service manuals for the models listed below. Always verify against your unit’s parts list by model & serial.
| OEM Brand | Graco |
|---|---|
| Part Number | 100680 |
| Common Name | Screw, Cap, Hex Head (Hex HD) |
| Thread / Size | 3/8-16 UNC, length approx. 7/8 in. (verify in your manual) |
| Typical Use | Fastening structural/assembly points on ThermoLazer / ProMelt units (location varies by model). |
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