NASA standard detonator

{{About|the NASA device|other meanings of NSD|NSD (disambiguation)}}

Image:NASA standard detonator.svg (NSI), an electric initiator device.]]

The NASA Standard Detonator (NSD) is a device used by NASA for applications where a charge must be detonated, usually in conjunction with frangible nuts as a release mechanism. NSDs have been used since the Gemini program, and were used for the Space Shuttle program, including the Solid Rocket Booster (SRB) separation from the External Tank, as well as the SRB Range Safety System.{{cite web |first1=William W. |last1=Tarbell |first2=Terence L. |last2=Burke |first3=Steve E. |last3=Solomon|url=http://www.osti.gov/bridge/servlets/purl/71636-0DHwZM/webviewable/71636.pdf |title=Performance characterization of the NASA standard detonator |date=1 May 1995 |accessdate=22 December 2011}} Chemring (formerly Hi-Shear) is the primary provider for the NSDs which were used on the Space Shuttle.{{cite web|title=Product Listing|url=http://www.chemringenergeticdevices.com/products/product-listing|publisher=Chemring Group PLC|accessdate=20 May 2017}}