About Shoulder Screws
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About Threaded Studs and Rods
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About Thumb Screw and Binding Post Materials
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Steel Press-Fit Studs
These steel studs are zinc plated to resist corrosion in wet environments. Press them into a drilled or punched hole with an arbor press or similar pressure tool. Also known as self-clinching studs, ribs under the head hold the stud firmly in place. Length listed is overall length.
For technical drawings and 3-D models, click on a part number.
Lg. | PEM® Part Number | Thread Lg. | Drill Bit Size | For Min. Material Thick. | For Min. Lg. Between Hole Center and Sheet Edge | For Hole Dia. | Hole Size Tolerance | Base Dia. | Tensile Strength | Hardness | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4-40 | |||||||||||||
1/4" | FH-440-4 | 5/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 100 | 000000000 | 000000 |
5/16" | FH-440-5 | 15/64" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 50 | 000000000 | 0000 |
3/8" | FH-440-6 | 9/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 100 | 000000000 | 00000 |
1/2" | FH-440-8 | 13/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 100 | 000000000 | 00000 |
5/8" | FH-440-10 | 17/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 50 | 000000000 | 0000 |
3/4" | FH-440-12 | 43/64" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 50 | 000000000 | 00000 |
7/8" | FH-440-14 | 51/64" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 25 | 000000000 | 00000 |
1" | FH-440-16 | 59/64" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 25 | 000000000 | 00000 |
1 1/4" | FH-440-20 | 1 11/64" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 25 | 000000000 | 00000 |
Stainless Steel Press-Fit Studs
18-8 stainless steel studs have good chemical resistance and may be mildly magnetic. Press them into a drilled or punched hole with an arbor press or similar pressure tool. Also known as self-clinching studs, ribs under the head hold the stud firmly in place. Length listed is overall length.
For technical drawings and 3-D models, click on a part number.
Lg. | PEM® Part Number | Thread Lg. | Drill Bit Size | For Min. Material Thick. | For Min. Lg. Between Hole Center and Sheet Edge | For Hole Dia. | Hole Size Tolerance | Base Dia. | Tensile Strength | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4-40 | |||||||||||||
1/4" | FHS-440-4 | 5/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 50 | 000000000 | 000000 |
5/16" | FHS-440-5 | 7/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 50 | 000000000 | 00000 |
3/8" | FHS-440-6 | 9/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 50 | 000000000 | 00000 |
1/2" | FHS-440-8 | 13/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 50 | 000000000 | 00000 |
5/8" | FHS-440-10 | 35/64" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 25 | 000000000 | 0000 |
3/4" | FHS-440-12 | 21/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 25 | 000000000 | 0000 |
7/8" | FHS-440-14 | 51/64" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 10 | 000000000 | 00000 |
1" | FHS-440-16 | 29/32" | No. 34 | 0.040" | 7/32" | 0.111" | 0.000" to 0.003" | 0.191" | Not Rated | Not Rated | 10 | 000000000 | 00000 |
Headless Alloy Steel Precision Shoulder Screws
Without a head to get in the way, these screws fit in tight spaces where standard shoulder screws cannot. Either thread them in a countersunk hole for a flush mount, or install them with the shoulder sticking out to use them as pins or dowels for aligning and locating components. With a shoulder diameter that is more precise than our general purpose shoulder screws, these screws are a good choice for measuring devices, optical fixtures, laboratory equipment, and other applications where precision matters. Made of alloy steel, they are strong and resist wear.
For technical drawings and 3-D models, click on a part number.
Stainless Steel Hex-Head Thumb Screws
Made from 18-8 stainless steel, these thumb screws are chemical resistant and may be mildly magnetic. Tighten them with a wrench for more torque while fastening. Length is measured from under the head.
For technical drawings and 3-D models, click on a part number.
Head | ||||||
---|---|---|---|---|---|---|
Lg. | Wd. | Ht. | Tensile Strength, psi | Hardness | Each | |
18-8 Stainless Steel | ||||||
4-40 | ||||||
1/2" | 3/8" | 1/4" | 80,000 | Rockwell B83 | 000000000 | 00000 |
Tapped Rounded Machine Keys
Thread a screw through the tapped hole to pop these keys out of a keyway. When installed, they fill oval keyways completely, reducing stress on the key and shaft. Using them in a closed keyway keeps them from sliding along the shaft axis. The rounded ends make it easy to slide gears, hubs, and other components into place. To install, press them in to place. Use them for permanent or high-torque applications, or to replace a key in a worn keyway. Keys are made of steel.
Oversized keys create a tight fit. They conform to ANSI B17.1 Class 2 standards for dimensions and tolerances.
For technical drawings and 3-D models, click on a part number.
Tolerance | |||||||
---|---|---|---|---|---|---|---|
Lg. | Tolerance Rating | Ht. | Wd. | Thread Size | Specifications Met | Each | |
1018-1045 Carbon Steel | |||||||
3/16" × 3/16" | |||||||
1/2" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | 4-40 | ANSI B17.1 Class 2 | 000000000 | 00000 |
3/4" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | 4-40 | ANSI B17.1 Class 2 | 000000000 | 0000 |
1" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | 4-40 | ANSI B17.1 Class 2 | 000000000 | 0000 |
1 1/2" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | 4-40 | ANSI B17.1 Class 2 | 000000000 | 0000 |
1 3/4" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | 4-40 | ANSI B17.1 Class 2 | 000000000 | 0000 |
2" | Oversized | 0.000" to 0.001" | 0.000" to 0.001" | 4-40 | ANSI B17.1 Class 2 | 000000000 | 0000 |
Threaded Plug Gauges with Calibration Certificate
These gauges come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. They allow you to inspect internal threads on parts. All have a go gauge on one end and a no-go gauge on the other end. A taperlock handle lets you quickly replace worn gauges.
Check the minimum internal thread size with the go gauge end, and check the maximum internal thread size with the no-go gauge end. A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.
Threads have different classes of fit. Thread fit designates the tightness or looseness of mating threads. For example, inch threads with a 3B fit have tighter tolerances than threads with a 2B fit.
For technical drawings and 3-D models, click on a part number.
Threaded Plug Gauges
These have a go gauge on one end and a no-go gauge on the other end. They allow you to inspect internal threads on parts. A taperlock handle lets you quickly replace worn gauges.
Check the minimum internal thread size with the go gauge end, and check the maximum internal thread size with the no-go gauge end. A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.
Threads have different classes of fit. Thread fit designates the tightness or looseness of mating threads. For example, inch threads with a 3B fit have tighter tolerances than threads with a 2B fit.
For technical drawings and 3-D models, click on a part number.
Stud Welding Systems
Join threaded studs and pins to steel and stainless steel with resistance welding that won't damage the opposite side of the material.
Threaded studs are for thin-gauge base materials. Copper-plated steel studs have good corrosion resistance.
Copper-Plated Steel | |||||
---|---|---|---|---|---|
Thread Size | For Collet Thread Size | Head Dia. | Lg. | Pkg. of 100 | |
4-40 | 4-40 | 3/16" | 1/2" | 0000000 | 000000 |