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About Nuts, Materials, and Finishes
More
Round Coupling Nuts
With a smooth rounded body for a finished look, use these nuts to connect and extend threaded rods. Made from 18-8 stainless steel, they have good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Press-Fit Threaded Standoffs with Open End
A recess under the hex clinches a panel for a strong hold that won't push, pull, or twist out. When mounted with a lever press, the hex sits flush with the surface and the open end creates a through hole. These are also known as captive standoffs.
18-8 stainless steel standoffs have good corrosion resistance and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
| Lg. | For Hole Dia. | For Min. Panel Thick. | Thread Size | Threading | Thread Lg. | Min. Thread Lg. | PEM® Part Number | Specifications Met | Pkg. Qty. | Pkg. | |
0.165" OD | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4" | 0.166" | 0.04" | 4-40 | Fully Threaded | 1/4" | __ | SOS-440-8 | ASTM A380 | 25 | 000000000 | 00000 |
| 3/8" | 0.166" | 0.04" | 4-40 | Partially Threaded | __ | 3/16" | SOS-440-12 | ASTM A380 | 25 | 000000000 | 00000 |
0.212" OD | |||||||||||
| 1/4" | 0.213" | 0.04" | 6-32 | Fully Threaded | 1/4" | __ | SOS-632-8 | ASTM A380 | 25 | 000000000 | 00000 |
| 3/8" | 0.213" | 0.04" | 6-32 | Partially Threaded | __ | 3/16" | SOS-632-12 | ASTM A380 | 25 | 000000000 | 00000 |
| 1/2" | 0.213" | 0.04" | 6-32 | Partially Threaded | __ | 5/16" | SOS-632-16 | ASTM A380 | 25 | 000000000 | 00000 |
0.28" OD | |||||||||||
| 3/8" | 0.281" | 0.05" | 8-32 | Partially Threaded | __ | 3/16" | SOS-832-12 | ASTM A380 | 10 | 000000000 | 0000 |
| 1/2" | 0.281" | 0.05" | 8-32 | Partially Threaded | __ | 5/16" | SOS-832-16 | ASTM A380 | 10 | 000000000 | 0000 |
| 5/8" | 0.281" | 0.05" | 8-32 | Partially Threaded | __ | 5/16" | SOS-832-20 | ASTM A380 | 10 | 000000000 | 0000 |
Splined Press-Fit Threaded Standoffs with Open End
Also known as captive standoffs, the splines on these bite into a panel for a permanent hold and the open end creates a through hole. They have good corrosion resistance and may be mildly magnetic. Use a lever press to install.
For technical drawings and 3-D models, click on a part number.
| Lg. | For Hole Dia. | For Min. Panel Thick. | Thread Size | Threading | Thread Lg. | Min. Thread Lg. | Thread Fit | PEM® Part Number | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
0.219" OD | ||||||||||||
| 1/4" | 0.166" | 0.06" | 4-40 | Fully Threaded | 1/4" | __ | Class 2B | KFSE-440-8 | ASTM A582 | 25 | 000000000 | 000000 |
0.281" OD | ||||||||||||
| 1/4" | 0.213" | 0.06" | 6-32 | Fully Threaded | 1/4" | __ | Class 2B | KFSE-632-8 | ASTM A582 | 25 | 000000000 | 00000 |
| 3/8" | 0.213" | 0.06" | 6-32 | Fully Threaded | 3/8" | __ | Class 2B | KFSE-632-12 | ASTM A582 | 10 | 000000000 | 0000 |
| 1/2" | 0.213" | 0.06" | 6-32 | Partially Threaded | __ | 3/8" | Class 2B | KFSE-632-16 | ASTM A582 | 10 | 000000000 | 0000 |
Press-Fit Threaded Standoffs with Closed End
Also known as captive standoffs, a recess under the hex clinches the panel for a strong hold that won't push, pull, or twist out. When mounted, the hex sits flush with the surface and the closed end creates a neat, finished appearance. Use a lever press to install.
18-8 stainless steel standoffs have good corrosion resistance and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| Lg. | For Hole Dia. | For Min. Panel Thick. | Thread Size | Threading | Min. Thread Lg. | PEM® Part Number | Specifications Met | Pkg. Qty. | Pkg. | |
0.165" OD | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 5/16" | 0.166" | 0.04" | 4-40 | Partially Threaded | 5/32" | BSOS-440-10 | ASTM A380 | 25 | 000000000 | 000000 |
| 3/8" | 0.166" | 0.04" | 4-40 | Partially Threaded | 5/32" | BSOS-440-12 | ASTM A380 | 25 | 000000000 | 00000 |
0.212" OD | ||||||||||
| 5/16" | 0.213" | 0.04" | 6-32 | Partially Threaded | 5/32" | BSOS-632-10 | ASTM A380 | 25 | 000000000 | 00000 |
| 3/8" | 0.213" | 0.04" | 6-32 | Partially Threaded | 5/32" | BSOS-632-12 | ASTM A380 | 25 | 000000000 | 00000 |
| 1/2" | 0.213" | 0.04" | 6-32 | Partially Threaded | 1/4" | BSOS-632-16 | ASTM A380 | 25 | 000000000 | 00000 |
0.28" OD | ||||||||||
| 3/8" | 0.281" | 0.05" | 8-32 | Partially Threaded | 5/32" | BSOS-832-12 | ASTM A380 | 10 | 000000000 | 0000 |
| 1/2" | 0.281" | 0.05" | 8-32 | Partially Threaded | 1/4" | BSOS-832-16 | ASTM A380 | 10 | 000000000 | 0000 |
| 5/8" | 0.281" | 0.05" | 8-32 | Partially Threaded | 1/4" | BSOS-832-20 | ASTM A380 | 10 | 000000000 | 0000 |
Miniature Press-Fit Threaded Standoffs with Open End
Designed to fit in the limited space of compact electronics, such as laptops and hand-held devices, these standoffs have a recess under the head that clinches a panel while splines on the head bite in for an extra-stong hold. The open end creates a through hole. Standoffs have excellent wear resistance and may be mildly magnetic. Use a lever press to install.
For technical drawings and 3-D models, click on a part number.
| Lg. | For Hole Dia. | For Min. Panel Thick. | Thread Size | Threading | Thread Lg. | PEM® Part Number | Specifications Met | Pkg. Qty. | Pkg. | |
0.094" OD | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/32" | 0.095" | 0.012" | 0-80 | Fully Threaded | 3/32" | MSO4-080-3 | ASTM A380 | 25 | 000000000 | 00000 |
| 1/8" | 0.095" | 0.012" | 0-80 | Fully Threaded | 1/8" | MSO4-080-4 | ASTM A380 | 25 | 000000000 | 0000 |
0.124" OD | ||||||||||
| 3/32" | 0.125" | 0.012" | 2-56 | Fully Threaded | 3/32" | MSO4-256-3 | ASTM A380 | 25 | 000000000 | 0000 |
| 1/8" | 0.125" | 0.012" | 2-56 | Fully Threaded | 1/8" | MSO4-256-4 | ASTM A380 | 25 | 000000000 | 0000 |
| Lg., mm | For Hole Dia., mm | For Min. Panel Thick., mm | Thread Size | Thread Pitch, mm | Threading | Thread Lg., mm | PEM® Part Number | Specifications Met | Pkg. Qty. | Pkg. | |
2.4 mm OD | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 2.4 | 0.3 | M1 | 0.25 | Fully Threaded | 2 | MSO4-M1-2 | ASTM A380 | 25 | 000000000 | 000000 |
| 3 | 2.4 | 0.3 | M1 | 0.25 | Fully Threaded | 3 | MSO4-M1-3 | ASTM A380 | 25 | 000000000 | 00000 |
3.2 mm OD | |||||||||||
| 2 | 3.2 | 0.3 | M2 | 0.4 | Fully Threaded | 2 | MSO4-M2-2 | ASTM A380 | 25 | 000000000 | 0000 |
| 3 | 3.2 | 0.3 | M2 | 0.4 | Fully Threaded | 3 | MSO4-M2-3 | ASTM A380 | 25 | 000000000 | 0000 |
Inch-to-Inch Male Round Thread Adapters
Adapters are brass, which has good strength and corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | ||||||
|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | (A) | (B) | Hardness | Each | |
Brass | ||||||||
| 8-32 | 1/4"-20 | 13/64" | 1/4" | Class 2A | Class 2A | Rockwell B70 | 000000000 | 00000 |
Inch-to-Metric Male Round Thread Adapters
Adapters are brass, which has good strength and corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | |||||||
|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | Pitch (B), mm | (A) | (B) | (A) | (B) | Hardness | Each | |
Brass | |||||||||
| 8-32 | M6 | 1 | 13/64" | 1/4" | Class 2A | Class 6g | Rockwell B70 | 000000000 | 00000 |
| 8-32 | M4 | 0.7 | 3/16" | 3/16" | Class 2A | Class 6g | Rockwell B70 | 000000000 | 0000 |
| 1/4"-20 | M6 | 1 | 1/4" | 1/4" | Class 2A | Class 6g | Rockwell B70 | 000000000 | 0000 |
| 1/4"-20 | M4 | 0.7 | 1/4" | 13/64" | Class 2A | Class 6g | Rockwell B70 | 000000000 | 0000 |
Metric-to-Metric Male Round Thread Adapters
Adapters are brass, which has good strength and corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| (A) | Pitch (A), mm | (B) | Pitch (B), mm | (A) | (B) | (A) | (B) | Hardness | Each | |
Brass | ||||||||||
| M4 | 0.7 | M6 | 1 | 13/64" | 1/4" | Class 6g | Class 6g | Rockwell B70 | 000000000 | 00000 |