How to Install Key-Locking Inserts
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Left-Hand to Right-Hand Female Hex Thread Adapters

Often called sleeve nuts, these thread adapters fasten parts with right-hand threads to parts with left-hand threads.
Zinc-plated steel adapters are strong and corrosion resistant.
For technical drawings and 3-D models, click on a part number.

Thread Size | Thread Lg. | Thread Fit | Hex | Each | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | (A) | (B) | Size | Lg. | Hardness | 1-9 | 10-Up | |
Zinc-Plated Steel | |||||||||||
1 1/8"-7 | 1 1/8"-7 | 3 1/2" | 3 1/2" | Class 2B | Class 2B | 1 3/4" | 7 1/2" | Rockwell B65 | 000000000 | 000000 | 000000 |
Black-Phosphate Steel Key-Locking Inserts

A black-phosphate finish provides mild corrosion resistance. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole with stripped threads.
For technical drawings and 3-D models, click on a part number.
Key-Locking Inserts with Installation Tool

Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. These inserts are used to repair or convert threads in soft metals such as aluminum. They’re comparable to Keensert® inserts.
Black-phosphate steel inserts are mildly corrosion resistant.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | No. of Inserts Included | Each | |
Black-Phosphate Steel with Thick Wall | ||||||||
---|---|---|---|---|---|---|---|---|
1 1/8"-7 | 1 1/2"-12 | 1 5/8" | 1 7/16" | 1 7/16" | 4 | 2 | 000000000 | 0000000 |