74号反坦克手榴弹，俗称黏性炸弹（英语：Sticky Bomb），是一款英国于第二次世界大战设计和生产的手榴弹。它是其中一种为英国陆军和国土警卫队而开发的反坦克武器。由于英军在敦刻尔克大撤退时，失去了大量的反坦克炮，它此时便成为一项替代品，以解决反坦克炮数量不足的问题。

74号反坦克手榴弹由第一防卫司（MD1）设计，它内部有一个盛载硝酸甘油的玻璃球，其表面被糊上了强力黏合剂，用以固定于金属外壳上。当用户拉出手榴弹手抦上的针，外壳会一分为二而露出玻璃球，另一支针将启动爆炸机制。用户然后需要将它放上敌方坦克或其他载具，亦必需用少许力以打破玻璃球。它黏附上载具后，启动其手抦上的杠杆会启动一个5秒的爆炸倒数，5秒后硝酸甘油就会爆炸。

The Grenade, Hand, Anti-Tank No. 74, commonly known as the S.T. Grenade or sticky bomb, was a British hand grenade designed and produced during the Second World War. The grenade was one of a number of anti-tank weapons developed for use by the British Army and Home Guard as an ad hoc solution to a lack of sufficient anti-tank guns in the aftermath of the Dunkirk evacuation. Designed by a team from MIR(c) including Major Millis Jefferis and Stuart Macrae, the grenade consisted of a glass sphere containing an explosive made of nitroglycerin and additives (this added stability to the mix, as well as giving it its squash-head-like effect) covered in a powerful adhesive, and surrounded by a sheet-metal casing. When the user pulled a pin on the handle of the grenade, the casing would fall away and expose the sphere; another pin would activate the firing mechanism, and the user would then attempt to attach the grenade to an enemy tank or other vehicle, ideally with enough force to break the glass ball. After it was attached, releasing the lever on the handle would activate a five-second fuse, which would then detonate the nitroglycerin.