2Pcs Transmission Adapter Fittings 6AN Flare to 1/4" NPSM for TH350 TH400 700R4

Transmission Adapter Fittings 6AN Flare to 1/4" NPSM for TH350 TH400 700R4

These transmission adapter fittings convert a 6AN flare connection to a 1/4" NPSM thread, letting you plumb cooler lines on for TH350, TH400, and 700R4 transmissions.

Overview

This pair of transmission adapter fittings 6AN flare to 1/4" NPSM for TH350 TH400 700R4 makes the thread transition between your transmission case and AN style cooler lines straightforward. Each fitting is machined to seal at the flare end and thread into the case port, which suits builders running braided hose or replacing worn factory lines. Sold as a two piece set so both cooler line ports can be handled at once.

Built For Performance

• 6AN flare end mates with standard AN hose fittings
• 1/4" NPSM thread fits common transmission cooler ports
• Machined metal body resists pressure and heat
• Sold as a matched pair for both cooler line ports
• Compact hex body allows easy wrench access
• Straight design keeps hose routing clean

Fits These Machines

• for TH350 transmissions
• for TH400 transmissions
• for 700R4 transmissions

On-The-Job Use

• Plumbing aftermarket transmission coolers
• Replacing factory cooler line connections
• Building braided AN hose assemblies
• Transmission swaps and rebuild projects

Specs At A Glance

Good To Know

Q: Will these seal without extra sealant? A: The flare end seals metal to metal, while the NPSM thread may benefit from a suitable thread sealant depending on your port condition.

Q: Can I use these with rubber hose? A: These adapters are built for AN style flare connections, so pair them with matching 6AN hose ends rather than push-on rubber line.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.