Metallics QK5M 8 x 1/2 in. 1/4...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$50.09
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Metallics QK5M 8 x 1/2 in. 1/4 Hex Head Slotted Sharp Point Self-Piercing & Tapping Screws - Steel Zinc - 1000qty

Metallics QK5M 8 x 1/2 in. 1/4 Hex Head Slotted Sharp Point Self-Piercing & Tapping Screws - Steel Zinc - Each

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Model: QK5M
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$50.09
$0.09
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8 x 1/2 in. 1/4 Hex Head Slotted Sharp Point Self-Piercing & Tapping Screws - Steel Zinc - 1000qty

  • Additional Notes

    • Other sizes and quantities available by request.| Head dimensions of self-piercing screws differ firom those of standard tapping screws. | There is no single standard for self·piercing screw dimensions. These values are offered as a guide; deviations from these specifications may occur.

  • Features

    • Hex 1/4 Head with Slotted Drive
    • Undercut area beneath the head allows greater length of thread engagement.
    • 8 Diameter, 1/2" Length
    • Twin lead threads help to reduce driving torque.
    • Steel Zinc Material

Manufacturer Resources

Product Specs

Minimum Purchase:
1000 units
Arra Compliant:
N
Buy American Compliant:
No
Division:
Electrical H1
Drive Type:
Slotted
Driver Size:
#8
Fastener Head Height:
0.096 - 0.11 in.
Fastener Head Type:
Hex
Fastener Head Width:
0.244 - 0.25 in.
Fastener Length:
2-Jan
Field Application:
Electrical, Plumbing, Heating and Air Conditioning Industries
Hardness:
Rockwell C28-38
Language Code:
EN
Material Standard:
AISI 1018 - 1022
Neurspe:
https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Head_Slot_Sharp_Pt_Self_Pierce_TS.pdf
Order Minimum Imperial:
1000
Order Minimum Uom Imperial:
TH
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
4.57 in
Product Length:
3 in
Product Weight:
3.02 lbs
Product Width:
3 in
Screw Point Type:
Sharp Point
Slot Depth:
0.052 - 0.074
Slot Width:
0.045 - 0.054
Sub Division:
Electrical-E H2
Thread Per Inch:
15
Washer Od:
0.322 - 0.348 in.
Washer Thickness:
0.019 - 0.031 IN
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Self-Piercing & Tapping Screw
Type2:
Self-Piercing & Tapping Screw
Series:
JQK
Product Finish:
Zinc
Product Details:
Self-Piercing & Tapping Screw
Product Material:
Steel Zinc

Metallics QK5M – Frequently Asked Questions

1) Do I need to pre-drill a pilot hole for the Metallics QK5M self-piercing screws?
No. The QK5M is a sharp point self-piercing and tapping screw, so it pierces and forms its own thread in sheet metal without a pilot hole. Twin lead threads cut the driving torque, which matters when you are running hundreds of them into duct or enclosure sheet.
2) Will a #8 x 1/2 in. self-piercing screw hold in sheet metal duct and electrical boxes?
That is the intended use. Metallics lists the QK5M for electrical, plumbing, heating and air conditioning work, and the 1/2 inch length is sized for thin gauge material like duct, strut accessories, and panel or box sheet. The undercut beneath the head leaves more usable thread engaging the metal than a standard tapping screw of the same length.
3) Can I use these on a Buy American or ARRA-funded job?
No. The QK5M is listed as not Buy American compliant and not ARRA compliant, with country of origin reported as multiple. For a federally funded project with domestic sourcing requirements you will need a domestically produced fastener instead.
4) What driver do I need for the Metallics QK5M hex head screw?
The head is a 1/4 inch hex with a slotted drive, so you can run it with a 1/4 inch hex nutsetter or back it out with a flat blade. The slot measures 0.045 to 0.054 inch wide and 0.052 to 0.074 inch deep, and the head width is 0.244 to 0.25 inch. Driver size is listed as #8.
5) Is a self-piercing screw head the same size as a standard tapping screw head?
No, and it matters if you are matching existing fasteners. Metallics notes that self-piercing screw head dimensions differ from standard tapping screws, and that there is no single industry standard for self-piercing dimensions, so the published figures are a guide. On the QK5M, head height runs 0.096 to 0.11 inch across a 0.244 to 0.25 inch hex.
6) How hard is the Metallics QK5M screw, and what steel is it made from?
Case hardness is Rockwell C28-38 on AISI 1018 to 1022 steel with a zinc finish. That hardness is what lets the sharp point pierce sheet steel without snapping the shank, and the zinc plating gives basic indoor corrosion protection rather than exterior-grade coating.
7) What is the thread count on the Metallics QK5M, and does the washer-style head seal the hole?
Threads run 15 per inch. The head has an integral washer face with a 0.322 to 0.348 inch outside diameter and 0.019 to 0.031 inch thickness, which spreads bearing over the pierced hole. It is a bearing surface, not a gasket, so it does not weather-seal a penetration on its own.
How fast can I get the Metallics QK5M delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
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 QK5M come with a warranty?
Absolutely. The Metallics QK5M 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 QK5M?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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