
311.057 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $55.00 | Condition is New – Open box, 1 PC Dema 311.057 Rocket Quick Connect .057 Single Barb Red Injector, FREE SHIPPING | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $100.46 | Condition is New, 1 PC Dema 311.057 Rocket Quick Connect .057 Single Barb Red Injector, shipping cost = $7.99 | 99.5% |

The DEMA Engineering 311.057 Rocket Connect 057 Single Barb Injector is a high-performance component designed for use in rocket engines and other high-pressure applications. This injector features a single barb design, which provides excellent sealing performance and makes it suitable for use with a wide range of fuels.
The body of the injector is machined from high-strength materials, ensuring durability and resistance to the extreme pressures and temperatures encountered in rocket engine operation. The single barb is also made from robust materials, and is precision-machined to ensure a tight seal with the fuel line or fuel tank.
The DEMA Engineering 311.057 Rocket Connect 057 Single Barb Injector is designed to be easy to install and maintain. It comes with all necessary hardware, including O-rings and bolts, and can be installed with standard tools. The injector also features a simple, intuitive design that makes it easy to disassemble and clean, ensuring that it remains in top working condition.
This injector is suitable for use with a variety of fuels, including liquid oxygen, kerosene, and other hypergolic fuels. It is capable of handling high flow rates and can be used in both gimballed and fixed-nozzle applications. The injector's robust design and reliable sealing performance make it an ideal choice for use in the demanding environment of a rocket engine.
In summary, the DEMA Engineering 311.057 Rocket Connect 057 Single Barb Injector is a high-performance, reliable, and easy-to-use component designed for use in rocket engines and other high-pressure applications. Its robust design, excellent sealing performance, and ease of installation and maintenance make it an ideal choice for those seeking a top-quality injector for their rocket engine system.
Buying a DEMA Engineering 311.057 Rocket Connect 057 Single Barb Injector comes with several pros and cons that prospective buyers should consider before making a decision.
Pros:1. High-Quality Construction: This injector is made of high-quality materials, ensuring durability and reliability. It is designed to withstand the high pressure and temperature conditions commonly found in rocket engines.
2. Easy Installation: The single barb design of this injector makes it easy to install, as it requires only one connection point. This can save time and effort during engine assembly.
3. Precise Injection: The DEMA Engineering 311.057 injector is known for its precise injection capabilities, which is essential for ensuring efficient combustion and optimal engine performance.
4. Wide Applicability: This injector is suitable for use in a wide range of rocket engines, making it a versatile option for engine builders.
5. Good Customer Support: DEMA Engineering is known for its excellent customer support, which can be a significant advantage for buyers who may encounter issues during installation or operation.
Cons:1. Cost: The DEMA Engineering 311.057 Rocket Connect 057 Single Barb Injector is a high-performance component, and as such, it comes with a higher price tag compared to some other injector options.
2. Complex Design: Although the single barb design makes installation easier, the overall design of the injector may be more complex compared to other options, which could make maintenance and troubleshooting more challenging.
3. Limited Availability: DEMA Engineering is a niche supplier of rocket engine components, and their products may not be readily available from all suppliers or distributors.
Conclusion:The DEMA Engineering 311.057 Rocket Connect 057 Single Barb Injector is a high-quality, reliable, and precise injection component that is suitable for use in a wide range of rocket engines. Its ease of installation and excellent customer support are additional advantages. However, its higher cost, complex design, and limited availability are potential drawbacks. Ultimately, the decision to purchase this injector will depend on the specific needs and budget of the engine builder.
Recommendation:If the engine builder requires a high-performance, precise injection component and has the budget for it, then the DEMA Engineering 311.057 Rocket Connect 057 Single Barb Injector is an excellent option to consider. However, if cost or availability is a concern, then the engine builder may want to explore other injector options that may be more suitable for their needs.
Details:
The Dema engineering brand ensures quality and reliability, making it a valuable component for various industrial commercial applications. The Dema 311.057 rocket quick connect .057 single barb red injector is a rocker switch designed for electrical equipment and supplies. With a single phase and vibrant red color, this switch is perfect for connecting disconnecting power quickly.
specifications indusswitch:
- brand: Dema Engineering
- mpn: 311.057
- type: Rocker Switch
- color: Red
returns indusswitch:
- policy: no returns
offer indusswitch:
- sold #: 11
- started: december 18, 2025
- options: ship-to-home
- availability: in stock
- prices: $55.00–$100.46
- item condition:
- New – Open box
- New
- in stock #: 2
general indusswitch:
- category: Business & Industrial > Electrical Equipment Supplies > Rocker Switches
seller indusswitch:
- # reviews: 2813
- rating: 100.0%
- city: cleveland, ohio
shipping indusswitch:
- class: standard
- transit: 4-8 days
- service: usps ground advantage
- type: calculated
- carrier: usps
payments indusswitch:
- credit card: discover
- other
- wallet: google-pay

