What Is a Jack Nut?
A jack nut is a blind threaded fastener designed for thin or soft materials where a standard nut cannot be installed.
Typical materials include:
- thin sheet metal
- plastic panels
- fiberglass
- hollow structures
Jack nuts can be installed from one side of the panel, making them useful when the back side of the material is not accessible.
How Does a Jack Nut Work?
A jack nut works using expanding legs behind the panel.
When a screw is tightened:
- The screw pulls the jack nut body
- The legs collapse and expand
- The legs grip the back of the material
This creates a secure threaded anchor in thin materials.
When Should You Use a Jack Nut?
Jack nuts are ideal when working with thin or soft materials.
Typical applications include:
- sheet metal panels
- plastic parts
- fiberglass structures
- automotive trim
- electrical enclosures
Because the legs expand behind the panel, the load is distributed over a larger area.
Jack Nut vs Rivet Nut
Both jack nuts and rivet nuts are blind threaded fasteners, but they are used in different situations.
| Feature | Jack Nut | Rivet Nut |
|---|---|---|
| Best for | Thin materials | Thicker metal |
| Installation | Expanding legs | Collapsing body |
| Strength | Medium | Higher |
Available Jack Nut Sizes and Materials
We offer Jack Nuts in both inch and metric thread sizes, with multiple material and finish options.
Inch Jack Nut Sizes
6-32 Jack Nut
- 6-32 × 0.669 Steel Zinc Plated
- 6-32 × 0.669 Stainless Steel
- 6-32 × 0.866 Steel Zinc Plated
10-24 Jack Nut
- 10-24 × 0.71 Steel Zinc Plated
- 10-24 × 0.71 Stainless Steel
- 10-24 × 0.91 Steel Zinc Plated
- 10-24 × 0.91 Stainless Steel
1/4-20 Jack Nut
- 1/4-20 × 0.71 Steel Zinc Plated
- 1/4-20 × 0.71 Stainless Steel
- 1/4-20 × 0.91 Steel Zinc Plated
- 1/4-20 × 0.91 Stainless Steel
Metric Jack Nut Sizes
M4 Jack Nut
- M4 × 17 Steel Yellow Zinc Plated
- M4 × 22 Steel Yellow Zinc Plated
- M4 × 22 Stainless Steel
M5 Jack Nut
- M5 × 18 Steel Yellow Zinc Plated
- M5 × 18 Stainless Steel
- M5 × 23 Steel Yellow Zinc Plated
M6 Jack Nut
- M6 × 18 Steel Yellow Zinc Plated
- M6 × 18 Stainless Steel
- M6 × 23 Steel Yellow Zinc Plated
Available Materials and Finishes
Jack nuts are available in:
Materials
- Carbon Steel
- Stainless Steel
Finishes
- Zinc Plated
- Yellow Zinc Plated
- Nickel Plated
Looking for a Jack Nut Supplier?
Imperial Rivets & Fasteners supplies jack nuts in metric and imperial sizes, available in steel, stainless steel, and multiple finishes.
For quotes or technical questions, contact us:
