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Graco 100171 Screw Machine Pnh

The Graco 100171 Screw, Machine, PNH is a genuine OEM fastener used in multiple Graco assemblies for securing components and covers. Compact, durable, and precisely threaded for long service life.

  • Part Number: 100171
  • Type: Pan-Head Machine Screw (PNH)
  • Size: #4-40 × 0.5 in
  • Typical Use: Heated Headers, ProBell Controllers, Flow Meters
  • Material: OEM-grade steel

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Compatible Machines & Assemblies — Graco 100171 Screw, Machine, PNH

This small OEM fastener appears in multiple Graco assemblies. Always verify against your unit’s parts list before ordering.

  • Heated Header & Manifold — parts list shows 100171 (Qty 2) in the assembly.
  • ProBell® Speed Controller — lists 100171 as a pan-head screw (#4-40 × 0.5 in), (Qty 2).
  • ProBell® Air Controllers — includes 100171 pan-head screw (Qty 2).
  • Helical Gear Fluid Flow Meters (HG6000HR family) — bills 100171 as “screw, mach, pan head” (Qty 2).

What is it?

The Graco 100171 is a factory replacement machine screw used to fasten covers, brackets, and light components within various Graco assemblies. In several manuals it is identified as a pan-head machine screw (PNH).

Key Specifications

Graco Part No. 100171
Description (Graco) SCREW, MACHINE, PNH (Pan-Head)
Head / Drive Pan-head (as listed in multiple equipment manuals)
Size (example listing) #4-40 × 0.5 in (as specified in ProBell Speed Controller manual)
Typical Quantity Commonly Qty 2 in listed assemblies (varies by model)
Use Case Secures light panels, covers, or brackets in Graco controls/meters/headers

Fitment Guidance

  • Match by exact part number (100171) in your unit’s official parts list.
  • Do not substitute by “similar size” without confirming thread, length, and head style from your model’s manual.
  • Quantity and location differ by assembly; use the exploded diagram in the manual for precise placement.

Frequently Asked Questions

It depends on the assembly. If your model’s official parts manual lists 100171 at the required location, it fits. If it’s not listed, do not assume compatibility—sizes and head styles can differ by sub-assembly.

In Graco parts lists, “PNH” denotes a pan-head machine screw style. Manuals for ProBell controllers explicitly call 100171 a “pan head” screw.

Several Graco manuals list 100171 with a #4-40 × 0.5 in detail; treat this as the specification for the part number. Always confirm in your specific manual before substituting hardware.

Only if it exactly matches thread, length, head style, and grade, and the manual doesn’t require a specific coating or material. For warranty and safety, OEM fasteners are recommended.

Quantities vary. Example manuals show Qty 2 per assembly; check your model’s exploded diagram for the exact count and locations.

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