tf.nn.relu6

Computes Rectified Linear 6: min(max(features, 0), 6).

features A Tensor with type float, double, int32, int64, uint8, int16, or int8.
name A name for the operation (optional).

A Tensor with the same type as features.

References:

Convolutional Deep Belief Networks on CIFAR-10: Krizhevsky et al., 2010 (pdf)