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Graco 100157 Hex Hd Screw Cap

The Graco 100157 Hex Head Cap Screw is a genuine OEM fastener designed for secure assembly of Graco sprayers and supply systems. It ensures proper fit and durability.

  • Thread Size: ¼-20 UNC
  • Length: 0.375 in (3/8")
  • Head Type: Hex Head
  • Use: Common in color-change manifolds, Uni-Drum® supply systems, and finishing assemblies
  • OEM Quality: Ensures reliable tightening and alignment in Graco equipment

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Graco 100157 — Hex Head Cap Screw (¼-20 x 0.375 in)

Compatible Machines / Assemblies

Graco part 100157 Hex Head Cap Screw is a small fastener used across multiple Graco assemblies. A formal, complete model-by-model list is not published by Graco. Known appearances include the following assemblies; please confirm against your specific model’s parts manual.

  • Graco Color Change Manifold / Kits (references showing ¼-20 x 0.375 in cap screw)
  • Graco Uni-Drum® Supply System and related supply equipment (manuals list 0.38 in cap screws at select locations)
  • Other Graco finishing, supply, and pump assemblies where a ¼-20 hex cap screw of ~0.375 in length is specified

Key Specifications

Graco Part Number 100157
Official Description SCREW, CAP, HEX HD
Thread Size ¼-20 (UNC)
Length (approx.) 0.375 in (≈ 3/8")
Head Type Hex Head
Typical Use Fastening color-change manifolds, supply system brackets, and other Graco finishing components (verify per model manual).

Product Overview

The Graco 100157 Hex Head Cap Screw is a genuine OEM fastener commonly used where a compact ¼-20 x 0.375 in screw is specified. Using the correct OEM fastener helps maintain factory torque values, alignment, and safety on Graco assemblies.

How to Confirm Fit for Your Machine
  1. Identify your exact model (and any system kit installed).
  2. Open the official Graco parts manual for your model.
  3. Search the document for part number 100157.
  4. Match thread/length (¼-20 x 0.375 in) and usage location before ordering.

Frequently Asked Questions

Dimensionally it matches a ¼-20 x 0.375 in hex cap screw. However, Graco parts can include specific material/finish or quality requirements. For safety and warranty alignment, using the genuine Graco 100157 is recommended where specified in the manual.

Check your model’s parts manual. Search the PDF for 100157. If listed, it will show the exact diagram location and quantity. If not listed, your model may use a different fastener length or thread.

No—100157 is the screw only. Some assemblies pair it with a specific flat or lock washer (e.g., 100016 lock washer)—always follow the parts diagram for your assembly.

Torque values depend on the assembly and material being clamped. Use the torque specified in your model’s service manual. If torque is not listed, apply standard ¼-20 torque guidelines cautiously and re-check for leaks or loosening after initial use.

Substitutions are not advised. A longer screw may bottom out or damage components; a shorter screw may not provide sufficient thread engagement. Use the exact length 0.375 in and thread ¼-20 specified for your assembly.

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