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Sets of Parallels

Sets include multiple sizes of matched pairs that are precision ground for tight tolerances on the top and bottom edges. Place a parallel against each vise jaw and rest your workpiece on top to raise it within the vise and allow more clearance for cutting tools.
Metric
No. of Pairs | Lg., mm | Thick. | Ht. | Parallel Tolerance, mm | Material | Container Type | Each | |
2 Precision-Ground Sides | ||||||||
---|---|---|---|---|---|---|---|---|
20 | 100 | 2 mm 3 mm 4 mm 5 mm 6 mm | 5 mm, 10 mm, 15 mm, 20 mm 6 mm, 11 mm, 16 mm, 21 mm 7 mm, 12 mm, 17 mm, 22 mm 8 mm, 13 mm, 18 mm, 23 mm 9 mm, 14 mm, 19 mm, 24 mm | 0.01 | Steel | Wood Stand | 0000000 | 0000000 |
Lathe Chuck Jaw Nuts

Secure jaws to a CNC lathe chuck with industry standard 1.5 mm × 60° serrations or wider 3 mm × 60° serrations.
Jaw nuts with M6, M8, M10, M12, M16, and M20 threads fit most chucks made by Kitagawa, LMC, Samchully, Seoam, Auto Strong, and other brands.
Jaw nuts with inch and M14 threads fit most chucks made by Matsumoto.
For technical drawings and 3-D models, click on a part number.
Jaw Nuts with Metric Threads
Thread | Base | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
For Lathe Chuck Dia. | For Slot Wd. | Size | Pitch, mm | Ht. | Lg. | Wd. | Overall Ht. | For Serration Size | Mounting Hole Ctr.-to-Ctr. | Material | Each | |
4" | 0.315" | M6 | 1 | 11/64" | 61/64" | 29/64" | 17/32" | 1.5 mm × 60° | 0.591" | Steel | 0000000 | 000000 |
5" | 0.392" | M8 | 1.25 | 7/32" | 1 11/64" | 35/64" | 39/64" | 1.5 mm × 60° | 0.713" | Steel | 0000000 | 00000 |
6" | 0.472" | M10 | 1.5 | 19/64" | 1 13/32" | 11/16" | 23/32" | 1.5 mm × 60° | 0.787" | Steel | 0000000 | 00000 |
8" | 0.551" | M12 | 1.75 | 11/32" | 1 27/32" | 13/16" | 13/16" | 1.5 mm × 60° | 0.984" | Steel | 0000000 | 00000 |
10" | 0.63" | M12 | 1.75 | 11/32" | 1 63/64" | 7/8" | 27/32" | 1.5 mm × 60° | 1.181" | Steel | 0000000 | 00000 |
12" | 0.705" | M14 | 2 | 17/32" | 2 3/16" | 1 1/8" | 1 11/64" | 1.5 mm × 60° | 1.26" | Steel | 0000000 | 00000 |
12" | 0.827" | M16 | 2 | 29/64" | 2 9/16" | 1 5/32" | 1 3/32" | 1.5 mm × 60° | 1.181" | Steel | 0000000 | 00000 |
15" | 0.866" | M20 | 2.5 | 21/32" | 3 5/32" | 1 5/16" | 1 51/64" | 1.5 mm × 60° | 1.693" | Steel | 0000000 | 00000 |
21", 24" | 0.982" | M20 | 2.5 | 11/16" | 3 59/64" | 1 7/16" | 2 1/16" | 3 mm × 60° | 2.36" | Steel | 0000000 | 00000 |