Air system & brake fittings
- DOT push-to-connect 90° elbows & straights
- Unions, union elbows, union tees, branch tees
- 1/4", 3/8", 1/2" tube · 1/8"–1/2" NPT
- Shop packs of 10
Class 8 aftermarket parts · Twin Cities, MN
The fittings you go through every week. On the shelf.
Tandem Truck Supply imports the fast-moving parts repair shops and fleets use every day, keeps them stocked locally, and prices them for shops that buy every week. DOT air brake fittings first; filters and LED lighting next.
DOT / FMVSS 106 fittings
Seals rated to −40°
Wholesale pricing for shops
- Part
- 90° male elbow, push-to-connect
- Size
- 3/8" tube × 1/4" NPT
- Standard
- FMVSS 106 · SAE J2494
- Thread
- Pre-applied sealant
Product lines
A short list of parts, kept in stock
We focus on the parts shops reorder every week, so what you need is in stock.
Engine filtration
- Oil and fuel/water separator filters
- Air and cabin filters
- Cross-referenced to the numbers you already use
Lighting & electrical
- DOT/SAE LED marker & clearance lights
- Stop/turn/tail and work lights
- Pigtails and 7-way plugs
| Type | Tube OD | Thread |
|---|---|---|
| 90° male elbow | 1/4" · 3/8" · 1/2" | 1/8" – 1/2" NPT |
| Male connector (straight) | 1/4" · 3/8" · 1/2" | 1/8" – 1/2" NPT |
| Union / union elbow | 1/4" · 3/8" · 1/2" | – |
| Union tee / male branch tee | 3/8" · 1/2" | 1/4" NPT branch |
Factory-direct pricingWe buy direct from the manufacturer, with no middle layers, and pass the savings on to shops that buy every week.
Local stockInventory held in the Twin Cities, so common sizes aren't a special order.
Delivery to your shopRegular local delivery planned for wholesale accounts, so you're not driving to a parts counter.
Real peopleEmail us a part number or a photo and get a straight answer from a real person.
How it works
Ordering for shops & fleets
Send your list
Part numbers, sizes or photos of what you use most. We cross-reference to our range.
Get a price sheet
Wholesale pricing on the parts you actually buy, by the each or by the pack.
Stock your shop
Order as needed, or set up a stocking kit of your high runners, refilled on schedule.
Quality standards
Brake parts aren't the place to cut corners
Every supplier we work with has to meet these before we buy.
DOT-markedAir brake fittings stamped "DOT" with the maker's code, built to
FMVSS 106.Tested
SAE J2494 test reports required for push-to-connect fittings.Cold-ratedSeals rated for −40° Minnesota winters.
TraceableEvery lot labeled with part number, size and country of origin.
FAQ
Common questions
When can I order?
Our first air brake fitting stock is expected in early 2027. Request a quote now and we'll send pricing as soon as it lands.
Do you sell to individuals or only shops?
Both. Shops and fleets get wholesale pricing; owner-operators can buy single packs. Online multi-packs are planned.
Can you match the part numbers I use now?
Yes. Send us the part numbers from your current supplier and we'll cross-reference them to sizes in our range.
Are your fittings DOT compliant?
We only stock air brake fittings marked DOT with the manufacturer's code and backed by FMVSS 106 / SAE J2494 test reports.
Where do you deliver?
Local delivery in the Minneapolis–St. Paul area for wholesale accounts. Shipping elsewhere in the US for online orders.
For manufacturers · 供应商
Supply Tandem Truck Supply
We are a US importer of aftermarket Class 8 truck parts. We work directly with factories and buy FOB.
我们是美国重型卡车配件进口商，直接与工厂合作，FOB 采购。欢迎符合 DOT / FMVSS 标准的工厂联系我们：sales@tandemtrucksupply.com
What we require
- DOT marking and manufacturer code on air brake fittings; FMVSS 106 / SAE J2494 test reports
- FMVSS 108 / SAE compliance for vehicle lighting
- NHTSA-registered US agent for FMVSS-regulated parts
- Seals rated to −40°F / −40°C
- Bags of 10 or 25 labeled with part number, size and "Made in China"
- Samples before orders. No OEM logos.
Request a quote
Get on the first price list
Tell us what you buy most. We'll reply by email with pricing.
Service area
Minneapolis–St. Paul and surrounding communities. Shipping across the US for online orders.