Material Material |
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Finish Finish | Show |
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Finish Finish | Hide |
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Head Type Head Type |
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 | Socket |
Socket Head Profile Socket Head Profile |
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 | Standard |
Threading Threading |
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 | Fully Threaded |
 | Partially Threaded |
Drive Style Drive Style |
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| Hex | External Hex |
Specifications Met Specifications Met |
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Thread Direction Thread Direction |
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Thread Type Thread Type |
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Nut Type Nut Type |
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| Flange | Hex |
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| Locknut | Rivet Mount |
Tensile Strength Tensile Strength |
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Hardness Hardness |
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Locking Type Locking Type |
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| Distorted Thread | Flex-Top |
About Nuts, Materials, and Finishes
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About Socket Head Screws
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18-8 Stainless Steel Socket Head Screws
Made from 18-8 stainless steel, these screws have good chemical resistance and may be mildly magnetic. Length is measured from under the head.Silver-plated stainless steel screws have mild lubricity so they thread smoothly.
Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine threads are closely spaced to prevent loosening from vibration. They are not compatible with coarse threads.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
2-56 | |||||||||
Silver-Plated 18-8 Stainless Steel | |||||||||
| 1/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 70,000 | 5 | 000000000 | 00000 |
| 3/16" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 70,000 | 5 | 000000000 | 0000 |
| 1/4" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 70,000 | 5 | 000000000 | 0000 |
| 3/8" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 70,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | Coarse | 9/64" | 0.086" | 5/64" | 70,000 | 5 | 000000000 | 0000 |
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
4-40 | |||||||||
Silver-Plated 18-8 Stainless Steel | |||||||||
| 1/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 00000 |
| 3/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 0000 |
| 5/8" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 70,000 | 5 | 000000000 | 0000 |
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
6-32 | ||||||||||
Silver-Plated 18-8 Stainless Steel | ||||||||||
| 1/4" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | 5 | 000000000 | 00000 |
| 3/8" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | 5 | 000000000 | 0000 |
| 1/2" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | 5 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | 5 | 000000000 | 0000 |
| 1" | Partially Threaded | 3/4" | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | 5 | 000000000 | 0000 |
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
8-32 | ||||||||||
Silver-Plated 18-8 Stainless Steel | ||||||||||
| 3/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 5 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 5 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 5 | 000000000 | 0000 |
| 1" | Partially Threaded | 3/4" | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | 5 | 000000000 | 00000 |
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
10-24 | ||||||||||
Silver-Plated 18-8 Stainless Steel | ||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 5/16" | 0.19" | 5/32" | 70,000 | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 5/16" | 0.19" | 5/32" | 70,000 | 5 | 000000000 | 0000 |
| 1" | Partially Threaded | 7/8" | Coarse | 5/16" | 0.19" | 5/32" | 70,000 | 5 | 000000000 | 00000 |
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
10-32 | ||||||||||
Silver-Plated 18-8 Stainless Steel | ||||||||||
| 3/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 5 | 000000000 | 00000 |
| 1/2" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 5 | 000000000 | 0000 |
| 5/8" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 5 | 000000000 | 0000 |
| 3/4" | Fully Threaded | __ | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 5 | 000000000 | 0000 |
| 1" | Partially Threaded | 7/8" | Fine | 5/16" | 0.19" | 5/32" | 70,000 | 5 | 000000000 | 00000 |
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Pkg. Qty. | Pkg. | |
1/4"-20 | ||||||||||
Silver-Plated 18-8 Stainless Steel | ||||||||||
| 1/2" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 5 | 000000000 | 00000 |
| 5/8" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 5 | 000000000 | 00000 |
| 3/4" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 5 | 000000000 | 00000 |
| 1" | Fully Threaded | __ | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 5 | 000000000 | 00000 |
| 1 1/4" | Partially Threaded | 1" | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 5 | 000000000 | 00000 |
| 1 1/2" | Partially Threaded | 1" | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | 5 | 000000000 | 00000 |
| Plugs for Chrome-Plated 18-8 Stainless Steel Socket Head Screws with Drive Size 3/16" | 000000000 | Each | 00000 |
Cleaned and Bagged 18-8 Stainless Steel Socket Head Screws for High Vacuum
Cleaned and double bagged in an ISO Class 5 (Fed. Std. Class 100) clean room, these screws are ready to use on chambers and components in high-vacuum systems. 18-8 stainless steel releases gas at a slower rate than other metals, allowing your system to achieve higher levels of vacuum. Screws are silver plated for lubricity, reducing wear over time. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Thread Spacing | Dia. | Ht. | Drive Size | Tensile Strength, psi | Environmental Rating | Specifications Met | Each | |
Silver-Plated 18-8 Stainless Steel | ||||||||||
4-40 | ||||||||||
| 1/2" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 000000 |
| 3/4" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.183" | 0.112" | 3/32" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
6-32 | ||||||||||
| 1/2" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.226" | 0.138" | 7/64" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
8-32 | ||||||||||
| 1/2" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 0.27" | 0.164" | 9/64" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
10-32 | ||||||||||
| 1/2" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 3/4" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 1" | Fully Threaded | Fine | 5/16" | 0.19" | 5/32" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
1/4"-20 | ||||||||||
| 1/2" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 3/4" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
| 1" | Fully Threaded | Coarse | 3/8" | 1/4" | 3/16" | 70,000 | Fed. Std. Class 100, ISO Class 5 | __ | 000000000 | 00000 |
M3 × 0.5 mm | ||||||||||
| 8mm | Fully Threaded | Coarse | 5.5mm | 3mm | 2.5 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 10mm | Fully Threaded | Coarse | 5.5mm | 3mm | 2.5 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 12mm | Fully Threaded | Coarse | 5.5mm | 3mm | 2.5 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
M4 × 0.7 mm | ||||||||||
| 8mm | Fully Threaded | Coarse | 7mm | 4mm | 3 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 10mm | Fully Threaded | Coarse | 7mm | 4mm | 3 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 12mm | Fully Threaded | Coarse | 7mm | 4mm | 3 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
M5 × 0.8 mm | ||||||||||
| 8mm | Fully Threaded | Coarse | 8.5mm | 5mm | 4 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 10mm | Fully Threaded | Coarse | 8.5mm | 5mm | 4 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 12mm | Fully Threaded | Coarse | 8.5mm | 5mm | 4 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
M6 × 1 mm | ||||||||||
| 8mm | Fully Threaded | Coarse | 10mm | 6mm | 5 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 10mm | Fully Threaded | Coarse | 10mm | 6mm | 5 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
| 12mm | Fully Threaded | Coarse | 10mm | 6mm | 5 mm | 70,000 | Fed. Std. Class 100, ISO Class 5 | DIN 912, ISO 4762 | 000000000 | 00000 |
Mil. Spec. Stainless Steel Flex-Top Locknuts for Heavy Vibration
Choose these locknuts for their adherence to strict military standards for material and construction. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. Threads at the top of the nut expand to grip the bolt on all sides for a stronger hold than distorted-thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. A silver plating adds lubricity so they thread on smoothly.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Silver-Plated 18-8 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
| 4-40 | 1/4" | 9/64" | MS21046C04, NASM21046 | 1 | 000000000 | 00000 |
| 6-32 | 5/16" | 11/64" | MS21046C06, NASM21046 | 1 | 000000000 | 0000 |
| 8-32 | 11/32" | 15/64" | MS21046C08, NASM21046 | 1 | 000000000 | 0000 |
| 10-32 | 3/8" | 15/64" | MS21046C3, NASM21046 | 1 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 9/32" | MS21046C4, NASM21046 | 1 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 25/64" | MS21046C6, NASM21046 | 1 | 000000000 | 0000 |
Stainless Steel Distorted-Thread Flange Locknuts
These flange locknuts have excellent resistance to chemicals and salt water. They have an irregularly shaped thread that grips the bolt for a stronger hold than nylon-insert flange locknuts. A flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. These nuts may be mildly magnetic. Height includes the flange.
A286 stainless steel nuts cannot be reused.
For technical drawings and 3-D models, click on a part number.
Flange | ||||||||
|---|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Dia. | Thick. | Specifications Met | Pkg. Qty. | Pkg. | |
Silver-Plated A286 Stainless Steel | ||||||||
| 4-40 | 5/32" | 1/8" | 0.206" | 0.03" | MS21043-04 | 1 | 000000000 | 00000 |
| 6-32 | 3/16" | 9/64" | 0.244" | 0.03" | MS21043-06 | 5 | 000000000 | 0000 |
| 8-32 | 7/32" | 3/16" | 0.29" | 0.03" | MS21043-08 | 1 | 000000000 | 0000 |
| 10-32 | 1/4" | 3/16" | 0.33" | 0.03" | MS21043-3 | 1 | 000000000 | 0000 |
| 1/4"-28 | 5/16" | 7/32" | 0.42" | 0.04" | MS21043-4 | 5 | 000000000 | 0000 |
| 5/16"-24 | 3/8" | 17/64" | 0.52" | 0.04" | MS21043-5 | 1 | 000000000 | 0000 |
| 3/8"-24 | 7/16" | 9/32" | 0.62" | 0.04" | MS21043-6 | 1 | 000000000 | 0000 |
Mil. Spec. Rivet-Mount Nuts
Create threads in hard-to-work areas—where you can’t reach the back of a workpiece, or material is too thin to be tapped. For a strong grip, these nuts have distorted threads that increase friction with bolts. Because they mount with two rivets, they won’t spin when you’re tightening screws. However, these nuts do move inside their retainers, which lets you install bolts at a slight angle; use them to align with off-center parts. All meet military guidelines for dimensions and material.
A286 stainless steel nuts are corrosion resistant. Silver-plated stainless steel nuts withstand temperatures up to 800° F. The silver plating also adds lubricity and prevents seizing caused by friction between nuts and bolts.
For technical drawings and 3-D models, click on a part number.
Base | Barrel | Mounting | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Thick. | Dia. | Ht. | No. of Holes | Hole Dia. | Hole Ctr.-to-Ctr. | Specifications Met | Each | |
Silver-Plated A286 Stainless Steel—Unlubricated | |||||||||||
| 4-40 | 21/32" | 5/16" | 3/32" | 0.141" | 1/16" | 2 | 0.098" | 13/32" | MS21076-04N | 000000000 | 00000 |
| 4-40 | 61/64" | 13/32" | 1/32" | 0.141" | 9/64" | 2 | 0.098" | 11/16" | MS21060-04 | 000000000 | 0000 |
| 6-32 | 61/64" | 13/32" | 1/32" | 0.156" | 11/64" | 2 | 0.098" | 11/16" | MS21060-06 | 000000000 | 0000 |
| 8-32 | 45/64" | 23/64" | 3/32" | 0.168" | 5/32" | 2 | 0.098" | 15/32" | MS21076-08N | 000000000 | 0000 |
| 8-32 | 61/64" | 13/32" | 1/32" | 0.168" | 7/32" | 2 | 0.098" | 11/16" | MS21060-08 | 000000000 | 0000 |
| 10-32 | 47/64" | 13/32" | 3/32" | 0.194" | 5/32" | 2 | 0.098" | 1/2" | MS21076-3N | 000000000 | 0000 |
| 10-32 | 61/64" | 13/32" | 1/32" | 0.194" | 7/32" | 2 | 0.098" | 11/16" | MS21060-3 | 000000000 | 0000 |
| 1/4"-28 | 51/64" | 1/2" | 3/32" | 0.254" | 3/16" | 2 | 0.098" | 9/16" | MS21076-4N | 000000000 | 00000 |
| 1/4"-28 | 1 19/64" | 33/64" | 1/32" | 0.254" | 1/4" | 2 | 0.098" | 1" | MS21060-4 | 000000000 | 00000 |
| 5/16"-24 | 1 1/64" | 37/64" | 7/64" | 0.317" | 7/32" | 2 | 0.13" | 23/32" | MS21076-5N | 000000000 | 00000 |
| 5/16"-24 | 1 19/64" | 39/64" | 3/64" | 0.317" | 9/32" | 2 | 0.13" | 1" | MS21060-5 | 000000000 | 00000 |
| 3/8"-24 | 1 19/64" | 43/64" | 1/16" | 0.379" | 19/64" | 2 | 0.13" | 1" | MS21060-6 | 000000000 | 00000 |