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Graco 100001 Screw Cap Hex Hd

The Graco 100001 Screw, Cap, Hex Hd is an OEM fastener designed for precise fit and durability in Graco industrial pump assemblies. Ideal for maintaining secure motor-to-plate connections.

  • Part Number: 100001
  • Thread Size: 5/16–18 UNC-2A × 0.625 in (16 mm)
  • Used In: Graco Viscount I+, High-Flo, and Viscount 2 pumps
  • OEM Quality: Ensures proper torque and alignment during reassembly

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Key Details & Compatibility for Graco 100001 Screw, Cap, Hex Hd

Compatible Machines

This OEM Graco 100001 hex-head cap screw appears in parts lists for the following Viscount / High-Flo pump assemblies:

  • Viscount I+ (High-Flo) pump assemblies — Displacement Pump Parts for:
    • Model 239833 (for pump models 220561, 236601, 239855)
    • Model 239834 (for pump models 220560, 220565, 236605)
    • Model 239835 (for pump models 220567, 220577, 236712)
  • High-Flo Severe-Duty (Electropolished Stainless Steel) pump assemblies:
    • Model 236602
    • Model 236606
    • Model 236713
  • Viscount 2 Pump — 4-Ball Lower:
    • Model 17E243 (2000 cc with sealed 4-ball lower)

Product Overview

The Graco 100001 Screw, Cap, Hex Hd is a genuine OEM fastener used to secure plates, adapters, and related hardware in Graco hydraulic-powered High-Flo and Viscount pump assemblies. Using OEM hardware helps maintain alignment, sealing integrity, and service-safe reassembly.

Technical Specifications

OEM Part 100001 — Screw, Cap, Hex Hd
Thread / Size 5/16–18 UNC-2A × 0.625 in (≈16 mm) length (per Graco High-Flo/Viscount I+ parts lists)
Typical Mating Hardware Lockwasher 100214 (where specified by assembly)
Typical Location Motor-to-adapter plates, mounting plates, and related pump assembly hardware (varies by model)
Finish / Grade Per Graco OEM specification for listed assemblies

Fitment & Installation Notes

  • Confirm quantity per assembly; common callouts show QTY 4 in certain High-Flo/Viscount I+ layouts, or QTY 1 where used with a specific mounting plate.
  • Follow the torque values in your pump’s Graco service manual; re-check torque after initial run-in.
  • Replace any worn lockwashers (100214) and inspect mating surfaces for damage or corrosion.

Frequently Asked Questions

Primarily, 100001 is referenced in High-Flo, Viscount I+, and Viscount 2 industrial pump assemblies. Consumer sprayers may use different fasteners; verify by model-specific parts list before ordering.

Many manuals list 5/16–18 UNC-2A × 0.625 in (≈16 mm) for 100001. Always follow the specification shown in your exact model’s parts diagram.

It’s best practice to install a new 100214 lockwasher where specified. This helps maintain clamp load and reduces loosening under vibration.

Check the serial/model plate on your pump and open the corresponding Graco parts manual. Locate the mounting/adapter plate or displacement-pump section to confirm the fastener callout.

Torque values vary by assembly and material. Always use the torque specified in your pump’s service manual. If not listed, default to standard torque for a 5/16–18 grade screw and adjust if the manual specifies otherwise.

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