W76

W76
The W76 warhead and Mk-4 re-entry vehicle (cutaway diagram) – Los Alamos National Labs image
Type	Nuclear weapon
Service history
In service	1978–present
Used by	United States and possibly the United Kingdom (see Trident Nuclear Program)
Production history
Designer	Los Alamos National Laboratory
Designed	W76-0 1973–1978, W76-2 2018
Manufacturer	Pantex Plant
Produced	W76-0 1978–1987 (full production), W76-1 2008-2018 (LEP), W76-2 2018-FY2024
No. built	~3,400
Variants	3
Specifications
Mass	95 kg[1]
Length	1300 mm [2]
Diameter	400 mm
Detonation mechanism	Contact, airburst
Blast yield	100 kt (W76-0) 90 kt (W76-1) 5–7 kt (W76-2)

The W76 is an American thermonuclear warhead, designed for use on the UGM-96 Trident I submarine-launched ballistic missiles (SLBMs) and subsequently moved to the UGM-133 Trident II as Trident I was phased out of service. The first variant, the W76 mod 0 (W76-0) was manufactured from 1978 to 1987, and was gradually replaced by the W76 mod 1 (W76-1) between 2008 and 2018, completely replacing the Mod 0 in the active stockpile. In 2018 it was announced that some Mod 1 warheads would be converted to a new low-yield W76 mod 2 (W76-2) version. The first Mod 2 warheads were deployed in late 2019.