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Graco 103972 Screw Drive

The Graco 103972 Screw, Drive is a precision type-U fastener used inside High-Flo displacement pumps to secure internal components and ensure stable alignment during operation.

  • Fits Graco pump assemblies 220-555 (Series E), 220-547 (Series D), and 220-551 (Series D)
  • Ensures reliable fastening and alignment of pump internals
  • OEM-grade screw built for durability and perfect fit

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Precision Drive Screw for High-Flo Pumps — Part 103972

Compatible Machines

The Graco 103972 Screw, Drive is used inside select Graco High-Flo displacement pumps and related assemblies. Known fitment includes the pump/model references below:

  • Pump assembly ref.: 220-555 (Series E) → used on pump models 220-563, 220-568, 236-606
  • Pump assembly ref.: 220-547 (Series D) → used on pump models 220-561, 220-566, 236-601
  • Pump assembly ref.: 220-551 (Series D) → used on pump models 220-559, 220-567, 220-577, 236-712

Overview

The 103972 is a small type-U drive screw used to secure and align internal components within specific Graco High-Flo pump assemblies. Its correct length and form ensure reliable seating without loosening under vibration.

Quick Specs

Part Number 103972 (also shown as 103-972 in some literature)
Official Name Screw, Drive (type-U)
Typical Length Approx. 3/16″ (per service references)
Application Internal fastening/alignment inside High-Flo displacement pumps

Key Features & Benefits

  • Form-fit drive screw for consistent holding power in cast and machined bores.
  • Prevents micro-movement of internal parts that can lead to premature wear.
  • OEM-spec component for assured compatibility and long service life.

Frequently Asked Questions

Match your unit’s pump model and series against the Compatible Machines list above or your official parts manual. If your pump number appears (e.g., 220-555, 220-547, 220-551 and their related models), 103972 is specified for that assembly.

Substitutions can cause improper seating or loosening. Use the OEM 103972 to maintain fit and service life, unless your service documentation explicitly allows an alternative.

Clean the bore, align the component per the service manual, and drive the screw to the specified depth only. Avoid over-driving, which can deform components or reduce holding strength.

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