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Graco 121518 Screw Cap SHC

The Graco 121518 Screw Cap SHC is a high-quality, corrosion-resistant screw for professional spray equipment. Key features include:

  • Material: 316 stainless steel with passivated surface
  • Design: Socket head cap screw for secure fit
  • Pressure Rating: Up to 5,000 PSI
  • Temperature Range: –20°C to +150°C
  • Compatible with: Graco Ultra Max II, ProX, Mark V/VII, ST Max

$3.73
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Graco 121518 Screw Cap SHC Overview

Compatible Machines

  • Graco Ultra Max II 490
  • Graco Ultra Max II 695
  • Graco ProX17
  • Graco ProX19
  • Graco Mark V
  • Graco Mark VII
  • Graco ST Max

Product Highlights

  • Design: Socket head cap screw for secure fit
  • Material: Premium 316 stainless steel resists corrosion and wear
  • Pressure Compatibility: High-pressure fluid systems up to 5,000 PSI
  • Temperature Range: –20°C to +150°C
  • Precision: CNC-machined tolerances within ±0.01 mm
  • Supports fast installation and minimal maintenance interruptions

Technical Specifications

Feature Specification
Dimensions 0.85 × 0.3 × 0.3 inches
Mass 0.01 lbs
Thread Tolerance Class 6g per ISO 965-1
Drive Depth 0.125" Hex socket
Head Diameter & Height 0.25" × 0.06"
Surface Finish Passivated Ra ≤ 0.8 μm
Tensile Strength 110 ksi
Yield Strength 80 ksi
Fatigue Life Exceeds 1,000,000 cycles at 80% yield stress

Frequently Asked Questions

It is made of premium-grade 316 stainless steel, passivated for corrosion resistance.

Compatible with high-pressure airless sprayer systems, filtration manifolds, and solvent or waterborne fluid circuits.

Install using a calibrated torque wrench: initial hand-tighten, then a two-step torque-angle method, with optional thread lubrication to prevent galling.

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