Collins-Oliver
Instrumentation Pipe Fittings
When Precision Matters, Can You Afford to Compromise on Your Fittings?
Your instrumentation systems demand accuracy, reliability, and leak-free performance. At Collins-Oliver, we specialize in instrumentation pipe fittings that deliver precision connections for process control equipment, control systems, fluid handling systems, and critical measurement applications.
From compression fittings to instrumentation valves, we stock the high-performance fittings that keep your processes running accurately and safely.

Instrumentation Pipe Fittings
Complete Line of Compression and Instrumentation Fittings
Looking for leak-free connections in high-pressure instrumentation systems?
We carry the industry's most trusted compression fittings, ferrule fittings, double ferrule fittings, and single ferrule fittings designed for instrumentation tubing applications. Our inventory includes precision-engineered fittings for pressure measurement devices, temperature measurement devices, flow control systems, and process control applications.
Our compression fitting selection includes:
- Compression fittings with ferrules and ferrule assemblies
- Bite-type fittings and bite type fittings for vibration resistance
- Double ferrule fittings for superior sealing
- Single ferrule fittings for simplified installation
- Tube fittings and instrumentation fittings for critical control loops
Brand-Name Instrumentation Fittings from Trusted Manufacturers
Why settle for generic when precision is critical?
Collins-Oliver stocks new and new surplus instrumentation fittings from the world's leading manufacturers:
- Swagelok fittings and Swagelok tube fittings
- Parker fittings and Parker Hannifin components
- Parker Hannifin fittings for demanding applications
- Hoke fittings for specialty service
- CPI fittings and A-LOK fittings alternatives
- VCR fittings and VCO fittings for ultra-high purity
- Brass fittings, brass tube fittings, and brass pipe fittings
- Stainless steel fittings, stainless steel tube fittings, and stainless steel pipe fittings
Tube Fittings for Every Instrumentation Application
Need the right connection for your measurement and control systems?
We stock thousands of tube fittings, pipe fittings, pipe connectors, and end connections suited for instrumentation systems, industrial piping systems, and pipeline infrastructure.
Our tube fitting inventory includes:
- Union fittings and unions for easy maintenance
- Elbow fittings and elbows (45°, 90°, street elbows)
- Tee fittings, tees, and branch tee configurations
- Cross fittings and crosses for multi-port junctions
- Reducer fittings and reducers for size transitions
- Adapter fittings and adapters for system compatibility
- Coupling fittings, couplings, and tube couplings
Threaded Fittings and Pipe Connections
Need NPT, BSP, or metric threads?
Collins-Oliver carries complete selections of threaded fittings, threaded tube fittings, and pipe fittings in every standard:
- NPT fittings and NPT threads for North American standards
- BSP fittings, BSP threads, and BSP thread connections
- Metric fittings for international equipment
- Pipe nipples, swage nipples, and nipple fittings
- Socket weld fittings for permanent installations
- Weld fittings and welded tube fittings for high-integrity systems
- Butt weld fittings for large-bore applications
- Flare fittings, flared fittings, and flange fittings
Instrumentation Valves and Flow Control
Managing process variables with precision?
We stock instrumentation valves, needle valves, ball valves, check valves, and manifold valves designed for accurate flow control and pressure regulation:
- Needle valves and needle valve assemblies for fine metering
- Ball valves and ball valve configurations for on/off service
- Check valves and check valve assemblies for backflow prevention
- Bleed valves and plug valves for venting and draining
- Gauge valves and gauge connections for instrument mounting
- Manifolds and manifold fittings for multiple instrument connections
- Monoflange valves and double block and bleed valves for safety isolation
Specialty Instrumentation Components
Got unique measurement or sampling requirements?
Collins-Oliver stocks specialty fittings for demanding applications:
- Bulkhead fittings and bulkhead connectors for panel mounting
- Quick connect fittings, quick connectors, and quick connects for fast disconnects
- Push-to-connect fittings for tool-free installation
- O-ring face seal fittings for leak-tight, high-pressure service
- Sanitary fittings for food, pharmaceutical, and biotech
- High pressure fittings for extreme service conditions
- Cryogenic valves for ultra-low temperature applications
Directional Fittings and System Layout Components
Building complex instrumentation runs?
We carry every configuration you need:
- Elbow fittings and elbows in multiple angles
- Tee fittings, tees, and pipe tees for branch connections
- Cross fittings, crosses, and pipe couplings
- Swivel fittings and swivel joints for flexible positioning
- Reducer fittings, reducers, and pipe reducers
- Connector fittings, connectors, and tube connectors
Caps, Plugs, and System Closures

Protecting ports or sealing test points?
Our inventory includes:
- Caps, cap fittings, and valve caps for port protection
- Plugs, plug fittings, and pipe plugs for system closure
- Caps and plugs in threaded and compression styles
- Valve caps for instrument isolation
Instrumentation Tubing and Piping Materials
The right tubing material ensures system integrity.
Collins-Oliver stocks:
- Instrumentation tubing and instrument tubing in multiple alloys
- Seamless tubing for critical applications
- Stainless steel tubing for corrosion resistance
- Brass tube fittings and copper fittings for thermal systems
- Brass fittings for economical installations
- Nickel alloy fittings for extreme service
- Carbon steel fittings for general purpose
- Alloy fittings for specialty applications
Plastic fittings for chemical resistance
Pipes and piping systems components
Quick Connect Systems and Fast Assembly
Need tool-free connections for frequent disconnects?
We carry:
- Quick connect fittings, quick-connect fittings, and quick connect couplings
- Quick disconnect fittings for rapid removal
- Push-to-connect fittings for instant installation
- Quick connectors and quick connects across multiple series
- Hose barb fittings, barb fittings, and hose barbs
- Hose fittings and barbed fittings for flexible connections
Hydraulic and Pneumatic Instrumentation Fittings
Instrumenting fluid power systems?
Our inventory serves both hydraulic systems and pneumatic systems:
- Pneumatic fittings for air system instrumentation
- Hydraulic valve and pneumatic valve connections
- Pressure transmitters and pressure transducers fittings
- Flow meters and flow control devices connections
Material Options for Corrosion Resistance
Protecting against harsh environments?
We carry corrosion resistance and corrosion resistant fittings in:
- Stainless steel fittings (304, 316, 316L)
- Brass fittings and brass tube fittings
- Copper fittings for copper systems
- Nickel alloy fittings for extreme corrosion
- Brass pipe fittings for tubing
- Carbon steel fittings with protective coatings
Thread Standards and Material Compatibility
Matching international standards and system requirements?
Collins-Oliver ensures material compatibility and thread standards compliance:
- NPT threads and NPT fittings (ANSI/ASME B1.20.1)
- BSP threads and BSP fittings (ISO 228)
- Metric fittings and metric threads
- ANSI standards and ISO standards compliance
- ASME standards conformance
- Thread types for global compatibility
- Threading standards documentation
Installation Support and System Accessories
Building or maintaining instrumentation systems?
We provide:
- Pipe clamps, tube clamps, and pipe supports
- Flanges, flanged fittings, and pipe fittings
- Bushings
- Mounting brackets
- Installation tools and assembly aids
- Couplings and hose fittings
- Supports and mounting hardware
Process Industry Applications
Whatever your process, we've got the fittings to instrument it.
Our instrumentation fittings serve:
- Process control equipment and control systems
- Industrial automation and process automation systems
- Fluid handling systems and fluid dynamics equipment
- Gas distribution systems and pipeline operations
- Process engineering and industrial piping systems
Complete System Solutions
Building integrated instrumentation systems?
We support complete installations with:
- Tubes and tubing materials
- Hoses and flexible connections
- Connectors and adapters for system integration
- Seals, gaskets, and o-rings
- Fasteners and mounting hardware
- Clamps and support systems
Why Choose Collins-Oliver for Instrumentation Pipe Fittings?
What's the best way to get precision fittings fast?
Frequently Asked Questions
All Your Questions Answered
Do you carry Swagelok and Parker instrumentation fittings?
Absolutely. We stock Swagelok fittings, Parker fittings, Hoke fittings, and other premium brands for immediate delivery.
Can I get both NPT and BSP threaded fittings?
Yes. We carry NPT fittings, BSP fittings, metric fittings, and all major thread standards.
What materials are available for corrosion resistance?
We stock stainless steel fittings, brass fittings, nickel alloy fittings, and specialty materials for extreme service.
Do you have compression fittings with ferrules in stock?
Yes. We carry compression fittings, double ferrule fittings, single ferrule fittings, and replacement ferrules.
Do you ship instrumentation fittings nationwide?
Yes. Local customers get same-day pickup in Baton Rouge. Out-of-state customers get fast, reliable shipping.
Can you help with instrumentation system design?
Absolutely. Our team provides application support, valve sizing, material compatibility guidance, and complete system solutions.
Collins-Oliver
Ready to Get the Precision Fittings Your Systems Demand?
Don't compromise on quality when accuracy matters.
Contact Collins-Oliver now for expert advice, deep inventory, and same-day solutions on instrumentation pipe fittings, compression fittings, instrumentation valves, and every component your measurement and control systems require.
Call us, visit our Baton Rouge location, or request a quote online. When precision matters, we deliver.
