General Purpose
Adapters, elbows and manifolds in the sizes a shop actually keeps.
NPT, BSPP and BSPT, compression tube, push-in air fittings, hose barbs and SAE 45° flare, in brass, stainless, aluminum, steel, acetal or polypropylene. Water, air and light oil.
- 1/8 to 1 in pipe
- Push-in 4 to 12 mm
- Brass, stainless, aluminum
Everyday ports
In the field
For the part that is almost standard
A BSPP port on an imported pump, a push-in air line and an NPT gauge. Build the exact adapter once and keep the reorder code for next time.
Photos: Unsplash, see image credits.
Built for shops and equipment builders
Everyday sizes, exact combinations
The general catalog keeps the common pipe, tube and hose sizes together so finding the right end is quick.
Everyday sizes
1/8 to 1 in NPT, BSPP and BSPT, compression tube to 1/2 in and 12 mm, hose barbs and SAE 45° flare.
Push-in for air
Push to connect ports for 4 to 12 mm and 5/32 to 3/8 in tube, with a purchased cartridge.
Material that suits the fluid
Brass and stainless for water, aluminum and steel for air and oil, acetal and polypropylene when weight or chemistry matters.
Start from a proven layout
Example general purpose parts
Starting points for air manifolds, adapters and elbows. Change any end, size or material in the builder.
Connections
General purpose connections in the catalog
Every connection the general purpose catalog offers, with its standard, seal and sizes. Larger pipe, flanges and sanitary ends live in their own industries.
| Connection | Standard | Seals on | Sizes | Standard rating |
|---|---|---|---|---|
| NPT | ASME B1.20.1 | Taper, sealant or PTFE tape | 1/8 to 1 (6) | up to 10,000 psi |
| BSPP | ISO 228-1, ISO 1179 | Bonded washer or ED seal | 1/8 to 1 (6) | up to 5,800 psi |
| BSPT | ISO 7-1 | Taper, sealant | 1/8 to 1 (6) | up to 10,150 psi |
| NPSM | ASME B1.20.1 NPSM straight pipe | 30° swivel seat, gasket or O ring | 1/4 to 1 (5) | up to 3,000 psi |
| Hose barb | Hose barb, tube ID | Tube grips the barb ridges, clamp or ferrule for pressure | 1/8 in to 1/2 in (9) | up to 150 psi |
| Compression | Double ferrule compression, tube OD | Front and back ferrule bite on the tube | 1/8 in to 12 mm (8) | up to 5,000 psi |
| Push to connect | Push to connect, CTS and metric tube | O ring with stainless grab ring cartridge | 4 mm to 12 mm (8) | up to 150 psi |
| SAE 45° flare | SAE J512 45° flare | 45° flare metal seat | -4 to -8 (3) | up to 2,000 psi |
| Micro ports | ISO 261, ASME B1.1 | O ring or bonded washer | #10-32 to 1/4-28 (3) | up to 1,500 psi |
Materials: 303 Stainless, 316/316L Stainless, C360 Brass, 6061-T6 Aluminum, 12L14 Steel, Acetal, Polypropylene. Fluids: Water or glycol, Air or gas, Hydraulic oil.
How it works
Configure today. Machined and shipped in days, not a quote cycle.
Configure the ports
Pick the shape, then the connection, size and gender on every end. The 3D model, drawing and price update as you go.
Order the quantity you need
One part or a production run. Instant checkout, no RFQ, and a $40 printed prototype if you want to test the fit first.
Machined, inspected, shipped
CNC machined in the USA, gauged and inspected, then shipped with a certificate of conformance and a reorder code.
FAQ
Questions about general purpose parts
What if I need a size that is not listed?
The general catalog keeps to common sizes. Switch to Custom Use in the builder for every type, size and material, including a custom thread diameter and pitch.
Do push-in ports include the cartridge?
Yes. Push to connect ports are machined for a purchased stainless collet and O-ring cartridge, which is installed before shipping.
Which material should I choose?
Brass or 316 for water, aluminum or steel for air and light oil, acetal or polypropylene for light weight and chemical resistance. The builder only shows materials that suit your fluid.
Can I get a single part?
Yes. There is no minimum order. Pricing improves with quantity and you can reorder any time with the code on your packing slip.
How do I identify a thread I have?
Use Identify a thread: measure the diameter and pitch, check for taper, and the tool matches it to NPT, BSPP, BSPT and other standards.
Specport for general purpose
The adapter that is almost standard
Design the exact combination online and have it machined in the material you need.