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Graco 166049 Swivel Nut

The Graco 166049 Swivel Nut is an OEM stainless coupling nut used in Graco fluid systems for secure, leak-free hose connections.

  • Thread size: 1" NPT
  • Hex outer diameter: 1-1/2"
  • Approx. length: 1.45"
  • Prevents hose twisting during operation
  • Ensures correct fit and pressure performance

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Compatibility & OEM Details

Compatible Machines

Model-specific compatibility for this part is not publicly listed by Graco. Please confirm against your sprayer’s parts list or assembly diagram (look for pump/manifold hose swivel connections using 1" NPT).

Graco 166049 Nut, Swivel — Genuine OEM

Graco 166049 Swivel Nut is a genuine OEM coupling nut used in Graco fluid systems to secure a swiveling hose/pipe connection without twisting the hose. Ideal for maintaining leak-free joints and correct pressure performance when servicing Graco pump and manifold assemblies.

Specifications

Part Number 166049 (also shown as 166-049)
Item Name Nut, Swivel
Thread / Connection 1" NPT (typical listing)
Hex OD 1-1/2" (typical listing)
Approx. Length ~1.45" (≈37 mm)
Material Stainless (per common listings)

Overview

  • Maintains a secure, swiveling joint on fluid lines to reduce hose twist and wear.
  • OEM build helps ensure proper fit, sealing surface quality, and pressure capability.
  • Use when servicing Graco fluid sections, manifolds, or hose assemblies that specify this part number.

Fit Guidance

  • Always verify the part number in your model’s official parts list or exploded diagram.
  • Confirm thread type/size (1" NPT) and mating component requirements before install.
  • Inspect threads and sealing faces; replace worn adapters or gaskets as needed.
  • Tighten to manufacturer-recommended torque; do not overtighten to avoid damage.

Frequently Asked Questions

Graco does not publish a universal cross-model list for this part. Check your machine’s parts list; if 166049 is referenced for your hose/manifold connection, it will fit. If you’re unsure, share your model and serial number for confirmation before ordering.

Typical listings show a 1" NPT swivel connection with a 1-1/2" hex OD. It’s used on fluid lines—commonly between pump/manifold and hose assemblies—to allow rotation without loosening the joint.

Clean and inspect threads, confirm orientation, and tighten to spec. After installation, pressure-test at a safe level to check for leaks. Replace mating adapters or seals if pitted or damaged.

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