When Milliseconds Matter™

Explosive Bolts | Sep Bolts.

E-Bolt | Explosively Actuated Bolt

PacSci EMC / Products / Explosive Bolts | Sep Bolts

EXPLOSIVE BOLTS | SEPARATION BOLTS | SEP BOLTS


Explosive Bolt Separation Bolt

Industry-specific high energy. Designed to exceed your mission-critical standards.

Explosive bolts, separation nuts and studs are designed for missile, spacecraft and marine applications where rapid structure separation is demanded. Pressure actuated, ridge cut, piston actuated and hydrodynamic (pressure amplified) pyrotechnic 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). 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.


They are used for fastening mating components or devices together to then allow rapid structural separation when commanded. Explosive bolts feature machined geometries to control the separation location and breaking strength. An explosive charge, located within a machined cavity in the bolt, or externally for Piston Bolts (Propulsive Bolts), provides the energetic stimulus required to cleanly separate the bolt at the predetermined break plane. Three of the most common explosive bolt designs fabricated at PacSci EMC are the Standard Pressure Actuated Bolt, Ridge-Cut Bolt, and Piston Actuated Bolt (Propulsive Bolt); each of which exhibits unique advantages. Methods used for explosive bolt actuation will vary depending on the explosive bolts’ application requirements.

Our pyrotechnic bolt applications include, but are not limited to, clamp release mechanisms, bulkhead and component release systems, rocket and missile stage separation, flight termination, along with jettison applications such as consumed or damaged structures, solid rocket booster (SRB) and satellite release.

Pyrotechnic Explosive Bolt designs are qualified and used for stage separation and release device for missile applications including Standard Missile 3, Range Extending Munitions Aero Packages, Solid Rocket Booster and main tank separation for the NASA shuttle, parachute deployment and mechanism release for weapon system.

Input Stimulus, Typical
3.5 amp (when electrically initiated)
TLX or SMDC input
4.5 AMP/4.1 millisecond


Tensile Strength
Up to 550,000 lbf


Operating Temperature
Designs as low as -65 °F and up to +270 °F


Separation Time, Typical
<10 milliseconds after application of All-Fire input stimulus
<5 milliseconds at greater currents


Applicable Specifications
Qualified for:

  • MIL-DTL-23659 Appendix A
  • Mil-C-83124
  • NASA NHB5300.4(1C)
  • Mil-STD-1512

Hermesticity (pre-function)
Designs that comply with 1 x 10-6 cc He/sec at 1 atm


ENVELOPE / INTERFACE DIMENSIONS

Explosive bolt and separation nut sizes and configurations can be tailored to meet structural loading, envelope and environmental conditions requirements for specific applications.


Explosive Bolt Technical Envelope

Our pyro bolt designs include pressure actuated, ridge cut, piston actuated and hydrodynamic (pressure amplified) in a wide range of sizes, configurations and tensile capacities (from as little as 200 pounds to as much as 1,000,000 pounds). 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 associated with exploding bolts.


 

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