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Screw 1/4-20 x 1 Truss PH 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 JTMP101 – Frequently Asked Questions
1) What size and thread is the Metallics JTMP101 truss head machine screw?
The Metallics JTMP101 is a 1/4-20 x 1 inch truss head Phillips machine screw. The 1/4-20 designation means a 1/4 inch nominal diameter with 20 threads per inch, which is the standard UNC coarse thread for that diameter, so it mates with any 1/4-20 nut or tapped hole.
2) Is the JTMP101 a machine screw or a self-tapping sheet metal screw?
It is a machine screw, not self-tapping. The JTMP101 has a blunt 1/4-20 machine thread that needs a tapped hole or a mating nut, so it will not cut its own thread in sheet metal. If you are fastening into bare unthreaded sheet, you need a self-drilling or sheet metal screw instead.
3) Why use a truss head screw instead of a pan head in an electrical box or enclosure?
A truss head is wider and lower in profile than a pan head, so it spreads bearing load over a larger area and sits flatter. That is what you want when fastening thin sheet metal, covers, or plates where a taller head would interfere with a device, cover, or raceway. The JTMP101 gives you that profile in 1/4-20 x 1 inch with a Phillips drive.
4) Are these truss head screws zinc plated for corrosion resistance?
Yes. The JTMP101 is steel with a zinc plating (St-Zn). Zinc plating handles dry indoor and protected locations, which covers most panel, box, and enclosure work. For wet, exterior, or corrosive environments you want stainless rather than zinc plated steel.
5) Will the JTMP101 thread into a 1/4-20 strut nut or channel nut?
Yes. Any 1/4-20 strut nut, spring nut, or tapped hole takes it, since the thread is a straight 1/4-20 match. The 1 inch length is the limit to watch: you need enough grip length for the nut plus whatever you are clamping, so for thick stacks or deep channel nuts step up to a longer 1/4-20 screw.
6) How many screws come in a jar of Metallics JTMP101?
Each jar holds 100 of the 1/4-20 x 1 inch truss head screws. Metallics packs them in a screw-top jar rather than a bag, which is what you want in a van drawer or on a shop bench since it stays closed and the count is easy to keep track of.
7) What driver do I need for the JTMP101 screws?
A Phillips driver. These are Phillips drive truss head screws, and a 1/4 inch diameter head of this type normally takes a #2 or #3 Phillips bit. Match the bit to the recess to avoid camming out when you are torquing into a tapped hole.
8) Is the Metallics part number for this screw JTMP101?
Yes, JTMP101 is the Metallics manufacturer part number for the 1/4-20 x 1 inch truss head Phillips machine screw in steel with zinc plating, jar of 100. That is the number to quote when ordering or matching a prior purchase.
How fast can I get the Metallics JTMP101 delivered?
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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 JTMP101 come with a warranty?
Absolutely. The Metallics JTMP101 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 JTMP101?
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