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Graco 100021 Cap Screw

The Graco 100021 Cap Screw is a genuine OEM hex-head fastener for securing guards, covers, and brackets on multiple Graco machines. Built for reliable hold and long service life.

  • Thread: 1/4-20 UNC
  • Length: 1 in (25 mm)
  • Head Type: Hex cap
  • Material: High-strength steel (OEM spec)
  • Used In: ThermoLazer, ProMelt, GrindLazer, Fire-Ball Topper Units, ProMix Easy

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Compatible Machines — Graco 100021 Cap Screw

  • ThermoLazer 200 / 200TC / 300TC (Thermoplastic line stripers)
  • ThermoLazer ProMelt models
  • GrindLazer scarifier (Model 25N658 enclosure — uses 100021)
  • 50:1 Fire-Ball 120-lb Drum Size Topper Units
  • ProMix Easy plural-component finishing systems

About This Part

The Graco 100021 Cap Screw is a genuine hex-head cap screw used across multiple Graco machines to secure guards, brackets, covers, and assemblies. It appears in numerous Graco OEM parts lists and manuals.

Specification Detail Notes
Part Number 100021 Genuine Graco OEM fastener
Description Screw, cap, hex head Listed as “SCREW, cap hex HD” in Graco manuals
Thread 1/4-20 (UNC) Unified coarse thread; verify per your model manual
Length 1 in (25 mm) in common documented uses Some retailers list application-specific lengths; match your manual
Typical Use Mounting guards, panels, brackets, drive/bearing plates Often paired with lock washers and hex nuts
Finish/Material High-strength steel (application dependent) Use stainless only if specified by the manual

Documented Uses in Graco Manuals

  • ThermoLazer / ProMelt manuals list 100021 as a cap screw in various assemblies.
  • GrindLazer (25N658) parts breakdown shows 100021 cap screws used in the enclosure section.
  • 50:1 Fire-Ball Topper Units parts list shows 100021 as 1/4-20 × 1 in cap screws.
  • ProMix Easy repair/parts manuals include 100021 for panel/tube hardware groups.

Frequently Asked Questions

It’s a hex-head cap screw, commonly documented as 1/4-20 × 1 in. Always verify the required length and any washer/nut pairings in your model’s parts manual.

It appears across many platforms (e.g., ThermoLazer, GrindLazer, Fire-Ball Topper Units, ProMix Easy). Check your machine’s exploded diagram—look for part 100021 in the hardware callouts.

Use stainless only if your Graco manual specifies it. Most documented uses call for high-strength steel. Matching the OEM spec preserves durability and warranty.

Quantity varies by model and sub-assembly (e.g., enclosure, bearing mount, guard). Your parts list will show the exact Qty next to 100021.

Graco manuals rarely publish torque for small hardware. Tighten to standard 1/4-20 hex-cap torque for the material & joint type, unless your manual states otherwise. Do not over-tighten—use thread locker only where specified.

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