Graco 16X674 Male Socket Fitting — 3/8″ 4000 PSI
This Graco 16X674 Male Socket Fitting is a high-pressure quick-disconnect socket designed for demanding fluid and spray applications. Its durable stainless-steel construction, precision-machined threads, and reliable seals ensure leak-free performance up to 4000 PSI. The 3/8″ connection enables rapid hose attachment and detachment, making it ideal for professional spraying, surface preparation, painting, or high-pressure fluid delivery systems.
Key Features
- Maximum working pressure: 4000 PSI (approx. 275–276 bar)
- 3/8″ quick-disconnect (QD) socket connection
- Stainless steel body with corrosion-resistant finish
- Precision-machined threads for secure, leak-free joints
- Compact form factor for easy installation even in tight spaces
- Compatible with high-pressure hoses, spray guns, reels, inline filters and QD accessories
Compatible Machines / Systems
The 16X674 fitting is designed for use with several pressure-washer and industrial spray systems from Graco’s professional range, especially those using 3/8″, 4000 PSI quick-disconnect technology. Compatible models and product lines include (but may not be limited to):
- Graco G-Force II series pressure washers — including models such as 4040, 3230, 3325, and other G-Force II units that specify 3/8″, 4000 PSI quick-disconnect hoses and accessories. :contentReference[oaicite:1]{index=1}
- Any Graco high-pressure washer or fluid system specifying a 3/8″ QD socket at 4000 PSI or lower — useful for surface-cleaning, coating, or lubrication circuits. :contentReference[oaicite:2]{index=2}
Material & Construction
The socket is manufactured from stainless steel (commonly 316-grade), with PTFE-backed seals for chemical resistance and long life. Precision CNC machining ensures accurate thread tolerances and prevents mis-threading. The compact design reduces internal volume, minimizing pressure drop and improving flow stability — which helps maintain consistent spray patterns or fluid delivery under high pressure.
Why Use This Fitting?
- Ensures factory-rated performance and safety up to 4000 PSI — crucial for high-pressure applications.
- Quick-disconnect design simplifies maintenance and reduces downtime during hose or accessory changes.
- Durable build handles corrosive coatings, solvent-based fluids, or water-based materials without degradation.
- Standardized 3/8″ connection helps maintain compatibility across hoses, spray guns, reels and accessories.
Frequently Asked Questions
The 16X674 Male Socket is rated for a maximum working pressure of 4000 PSI (≈ 276 bar). It is designed to handle pressures safely up to this limit.
It uses a 3/8″ quick-disconnect socket connection — compatible with hoses and accessories that match the same 3/8″ QD standard.
In principle, yes — if the other brand uses a 3/8″ quick-disconnect connection rated for 4000 PSI and dimensions match. However, using a genuine Graco fitting ensures reliable sealing and pressure-rating compliance. For best safety and performance, always verify compatibility before mixing brands.
The stainless-steel body and PTFE-backed seals provide good chemical resistance. It works well with a variety of fluids — including water-based and solvent-based coatings, cleaning solutions, and many industrial fluids — but you should always check fluid-compatibility depending on the chemical composition.
