|Hi-Shear is the primary qualified source for the NASA Standard Detonator (NSD) used for all detonating functions on the Space Shuttle. The NSD is a combined NASA Standard Initiator (NSI) with a hermetically sealed detonating module. Hi-Shear detonators are designed to transfer shock waves and high pressure energies for initiating detonating trains, Shielded Mild Detonating Cord (SMDC) Flexible Confined Detonating Cord (FCDC) and other linear explosive lines. The PD12 & PD18 Series function with 99.99% reliability at 95% confidence level from -165°F to +200°F and at altitudes to 420,000 feet. These series meet Range Safety Standards for RF & EMI hazards, and 5 minutes 1 Amp / 1 Watt No-Fire test.