The three integral jaws fo the connector snap securely over the nipple head and tighten to prevent leakage as lubricant pressure is increased during delivery. A small but definite sideways movement is requried for disconnecting.

These connectors are double-flanged to engage the heads of Tat and industrial Button Head Type nipples.  Each has a spring loaded sealing cap to prevent leakage when under pressure.

The Hook-On is for use with flexible delivery tubes.
The Thrust-On is for use with rigid tubes and incorporates a swivel joint if facilitate servicing.
 

This is a smaller version of the Tat Hook-On connector and is for use with miniature Tat nipples.

These connectors are larger versions of the Tat type and are designed for use with Giant Button Head nipples as fitted to large mobile and heavy duty equipment.

The head of  this connector has two helical slots which engage with crosspin of the nipple.  A spring loaded sealing disc prevents leakage between the nipple and the connector when under pressure.