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Small silver metal coupler plug with male threads

SPEEDAIRE

SPEEDAIRE 30E564 Coupler Plug 1/4 in Male NPT 304 SS

SKU CH-WD1C-T2MTE

Quick-connect 1/4 in male NPT coupler plug in 304 stainless steel with HNBR seal, rated 400 psi at 70°F and 1,132.67 L/min flow

  • 304 stainless steel resists corrosion in harsh environments
  • Male 1/4"-18 NPT threads connect directly to standard air lines
  • HNBR seals maintain integrity from -40°F to 200°F
  • 400 psi rating handles demanding pneumatic applications
  • 1,132.67 L/min flow capacity keeps tools running at peak

1/4 in Male NPT Stainless Coupler

The SPEEDAIRE 30E564 is a quick-connect hose coupling built from 304 stainless steel with a plain finish. It fits a 1/4 in Male NPT thread on a hose end or tool inlet and mates with ARO interchange couplers. The push-pull locking mechanism creates a sealed connection using an HNBR seal. It is suited for compressed-air systems that require corrosion-resistant fittings.

Sustained Pressure and Temperature Range

The coupling is rated for a maximum working pressure of 400 psi at 70°F and operates continuously from -40°F to 200°F. The 304 stainless construction resists corrosion during extended exposure to moisture or harsh environments. HNBR seal material maintains its properties across the full temperature span without hardening or cracking. Maximum flow capacity reaches 1,132.67 liters per minute under steady-state conditions.

Thread Installation and Common Issues

Installation requires threading the 1/4"-18 Male NPT end into a matching female port with appropriate thread sealant to prevent leaks. Over-tightening can distort the stainless threads or damage the HNBR seal, causing premature failure. The plain finish offers no lubricity, so a compatible sealant or tape is essential for reliable assembly. Buyers who need an integrated shut-off valve should select a different coupling style.

Highlights

  • 304 stainless steel resists corrosion in harsh environments
  • Male 1/4"-18 NPT threads connect directly to standard air lines
  • HNBR seals maintain integrity from -40°F to 200°F
  • 400 psi rating handles demanding pneumatic applications
  • 1,132.67 L/min flow capacity keeps tools running at peak

Specifications

BrandSPEEDAIRE

Questions about this item

Does the 304 stainless steel body and HNBR seal stay within the 400 psi rating when the compressor runs continuously at 70°F?

Yes — the coupler is rated for 400 psi at 70°F, and the 304 stainless steel with HNBR seal is specified for continuous operation at that pressure and temperature.

Which thread must my hose or tool already have to accept this 1/4"-18 male NPT plug?

The mating part needs a 1/4"-18 female NPT thread so the male plug can screw in and seal.

Will this ARO-interchange plug connect to the Tru-Flate automotive couplers already on my older air lines?

Yes — the plug follows the ARO interchange standard that matches Tru-Flate automotive couplers, so it locks into those existing fittings.

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