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Screw 8-32 x 1/2 PN PH SEMS MS St-Zn (Jar 100)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics JPMP84SEMS – Frequently Asked Questions
1) Is this an 8-32 machine screw or a self-tapping sheet metal screw?
Machine screw. The JPMP84SEMS is cut with a uniform 8-32 machine thread, so it needs an existing tapped 8-32 hole or a nut. It will not cut its own threads in sheet steel. If you are fastening into unthreaded metal, you need a self-tapping or thread-cutting screw instead.
2) What does SEMS mean on the Metallics JPMP84SEMS screw?
SEMS means the washer is pre-assembled and held captive under the head, so it cannot fall off or get lost on the job. You get the washer and screw as one piece, which is why electricians use SEMS for grounding and device mounting where a loose washer in a box is a nuisance.
3) What is the Metallics 8-32 x 1/2 SEMS screw made of, and can it be used outdoors?
Steel with a zinc plating. Zinc plating is a general indoor and dry-location corrosion finish, so these suit interior boxes, panels and enclosures. For wet, coastal or chemically aggressive locations, specify a stainless fastener rather than zinc-plated steel.
4) Will a 1/2 inch long 8-32 SEMS screw be long enough for mounting a device in a box?
At 1/2 inch of overall screw length, this works where the grip is short, mounting a ground lug, strap, bracket or plate directly against tapped metal. If you are stacking a device plus spacers or going through thicker material, step up to a longer 8-32 screw; a 1/2 inch screw loses thread engagement fast once material thickness is added.
5) How many 8-32 x 1/2 SEMS screws come in a jar?
100 screws per jar. Metallics packages the JPMP84SEMS in a jar, which is the format shops keep on the truck or at the bench for repeat device and enclosure work rather than a single-use bag.
6) What driver do I need for the Metallics JPMP84SEMS screw?
A Phillips driver. The head is a pan head with a Phillips recess, so a standard #2 Phillips bit or screwdriver handles it. Pan heads sit proud with a broad bearing surface, which with the captive SEMS washer spreads load on sheet metal and slotted brackets.
How fast can I get the Metallics JPMP84SEMS delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics JPMP84SEMS come with a warranty?
Absolutely. The Metallics JPMP84SEMS is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics JPMP84SEMS?
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