Graco 120138 Special Socket Head Cap Screw

Compatible Machines

• GH 833 (models 249318, 249617, 253471, 253472) :contentReference[oaicite:0]{index=0}
• GH 933 (model 16U783) :contentReference[oaicite:1]{index=1}
• GH 2570 – referenced in parts list including part 120138 :contentReference[oaicite:2]{index=2}

Product Overview

Introducing the 120138 SCREW, CAP, SOCKET HEAD, SPECIAL — a genuine Graco high-strength socket-head cap screw engineered for demanding hydraulic spray equipment applications. This part is specified in the parts breakdown of various Graco Big Rig hydraulic sprayer models, ensuring you get the correct OEM fastener for critical assemblies. :contentReference[oaicite:4]{index=4}

Key Features & Benefits

Suggested Use & Installation Tips

• Use this screw when repairing or rebuilding the hydraulic motor/pump assembly of the listed compatible machines.
• Clean mating surfaces and threads before installing to ensure correct preload and avoid loosening under vibration.
• Refer to your machine’s service manual for proper torque values — over- or under-tightening may compromise performance.
• Replace if the screw head or thread shows signs of wear, corrosion or deformation — genuine parts help extend machine life and reliability.

Frequently Asked Questions

If your machine model is not listed above, please verify the OEM parts manual or contact your authorized distributor to confirm compatibility.