Hold Down Release Mechanisms

A hold down and release mechanism (HDRM) is a critical component in the aerospace industry, designed to securely hold and precisely release various elements of aircraft and spacecraft during different phases of operation. At PacSci EMC, we specialize in manufacturing pyrotechnic HDRMs that utilize controlled energetic charges for rapid and reliable release. These mechanisms are essential for applications requiring immediate and decisive action, such as the deployment of satellite payloads, separation of rocket stages, and release of critical equipment during missions.

Pyrotechnic HDRMs offer high reliability and speed, making them ideal for high-stress environments where precision and timing are crucial. This makes them the preferred choice for scenarios demanding rapid and fail-safe operation.

Commonly used names include hold down and release mechanism, separation mechanism, separation devices, explosive bolts, separation bolts, separation nuts, explosive nuts, and frangible nuts.

Our Hold Down Release Mechanisms

Frangible Nut

Product Description

A frangible nut is intentionally created to split into two halves, doing so when two pyrotechnic devices break the nut thereby releasing the objects being held together. NASA’s Space Shuttle Rocket Boosters are a great example of this device in action.

The frangible nut offers reliability, precision, and control to help perfect mission-critical goals.

Separation Nut

Product Description

The separation nut is a pyrotechnic device designed to perform two functions – keep a pre-loaded assembly of two sets intact and then, upon an electrical signal, releasing the assembly. Known as a Hold Down and Release Mechanism (HDRM), they are a high strength, fastening hardware with the ability to separate and/or release components or structures on demand. As a pyrotechnical solution for critical release events, the most common uses include satellite deployment along with clamp release applications for weapons launch systems. Many of our sep nuts are used for in orbit deployment of antenna reflectors and solar generators as HDRMs

Whether in space, on aircraft or in the sea, dependability is required for mission critical systems needing hold down and release mechanisms that are designed and developed for low shock. Our highly reliable separation nuts are used for applications in submarine, launch vehicle, satellite, and payload systems. An example would be as an HDRM for CubeSat and SmallSat launches. Our separation devices are custom made to meet your mission requirements, from the nut size to the specific materials, the success of your application is at the center point of our design.

DOWNLOAD DATASHEETS

Separation Nut 2-502640-1
Mini Separation Nut 2-250150

Explosive Bolts

Product Description

Explosive bolts efficiently secure two objects and strategically explode, jettisoning those objects on command when commanded. These bolts initiate a perfect failure at the pivotal moment they need to. This part is designed for missile, launch vehicles, spacecraft and capable of marine applications where rapid structure separation is demanded. Standard explosive bolts and ridge cut explosive bolts are available in a wide range of sizes, configurations and tensile capacities from as little as 200 pounds to as much as 1,000,000 pounds. As an explosive bolt manufacturer, our experts are here to support you in meeting your structural loading, envelope and environmental requirements and guide you on ways to mitigate shrapnel and products of combustion.