Double T-Nut, 15 Series, 5/16-18 Stainless - Unaka Original

Two threaded positions in one nut body — for the narrow brackets where two standard T-nuts physically will not sit next to each other.

There is a specific, annoying problem this part solves. You have a narrow bracket with two bolt holes close together, you go to install two standard T-nuts side by side in the slot, and they interfere with each other. The bracket will not sit flat, or one nut cannot rotate into position.

Unaka’s original double T-nut is one stainless body carrying both threads at the correct spacing. It goes in as a single unit, so the interference problem disappears. It is designed for Unaka’s narrow cross bar brackets, and it works anywhere else the same crowding occurs.

What it is for

• Unaka narrow cross bar brackets, which the part was designed around.
• Any two-hole bracket where standard T-nuts crowd each other in the slot.
• Anywhere you want a single, positively located fastener carrying two bolts.

Compatibility

The 15 series is the 1.5 inch profile — the size almost every van roof rack and interior framing system is built from. If your extrusion measures 1.5 in across the face and takes a 5/16-18 fastener, this is your hardware.

Specifications

What's included

• (1) 15 series stainless double T-nut, 5/16-18 thread

Working with it

It loads the same way a standard T-nut does but occupies more slot length, so check that you have the run available before you commit — particularly close to a joint plate or an end cap.

Start both bolts before tightening either. A double T-nut cannot self-align to a misaligned bracket the way two independent nuts can.

• Check slot clearance near joints and end caps — it is longer than a single nut.
• Start both bolts finger-tight before torquing either one.
• Anti-seize on stainless-into-stainless threads to prevent galling.
• Re-check torque after the first long drive.

Questions we get asked

How do I know if my extrusion is 15 series?

Measure across the flat face of the profile. A 15 series extrusion is 1.5 in wide (or a multiple — 1.5 × 3.0, and so on) and the T-slot takes a 5/16-18 fastener. If your rack came from Unaka, 80/20 Inc., or most van rack makers in North America, it is 15 series.

How many should I order?

Count your joints, then add 20%. Rack hardware is the cheapest thing in a build and the most annoying thing to run out of halfway through a Saturday. We have never once regretted having spare T-nuts in the drawer.

When would I need this instead of two normal T-nuts?

When two normal T-nuts do not fit. It is that specific. On narrow brackets the two holes are close enough that individual nuts collide inside the slot; a double T-nut is one body at the correct spacing, so it simply goes in.

Pairs well with

• Van roof rack, ladder and 80/20 hardware

Sold and shipped by Campervan Parts R Us, the parts counter of Noke Van Co. — a working van conversion shop in Roanoke, Virginia. If you are unsure whether this fits your van, email us the year, model and wheelbase and we will check it against a build sheet before you order.