Metallics QK15GRM 8 x 1 in. 1/...
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Metallics QK15GRM 8 x 1 in. 1/4 Hex Head Slotted Sharp Point Self-Piercing & Tapping Screws - Gray - Steel Zinc - Each

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Model: QK15GRM

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

$50.29
$0.29
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8 x 1 in. 1/4 Hex Head Slotted Sharp Point Self-Piercing & Tapping Screws - Gray - 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

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

Manufacturer Resources

Product Specs

Minimum Purchase:
1000 units
Arra Compliant:
C
Buy American Compliant:
C
Division:
Electrical H1
Drive Type:
Slotted
Fastener Head Color:
Gray
Fastener Head Height:
0.096 - 0.11 in.
Fastener Head Type:
Hex
Fastener Head Width:
0.244 - 0.25 in.
Fastener Length:
1
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:
Box
Product Group:
Fasteners
Product Height:
7.25 in
Product Length:
4.5 in
Product Weight:
5.4 lbs
Product Width:
4.5 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 QK15GRM – Frequently Asked Questions

1) Does the Metallics QK15GRM self-piercing screw need a pilot hole?
No pilot hole. The QK15GRM is a sharp point self-piercing and tapping screw, so it pierces and forms its own thread in thin sheet metal as it drives. Twin lead threads cut the driving torque, and the undercut under the head gives you more thread engagement once it seats.
2) Do these Metallics screws qualify for Buy American or ARRA funded jobs?
The QK15GRM is flagged compliant for both Buy American and ARRA, which is what a government, school district, or federally funded project submittal asks for. Country of origin is listed as multiple.
3) What driver do I need for a 1/4 hex head slotted screw like the QK15GRM?
Two options, because the head takes both. It is a 1/4 inch hex washer head measuring 0.244 to 0.25 inch across, so a 1/4 inch magnetic hex driver bit or nut setter fits it. The head is also slotted (slot width 0.045 to 0.054 inch, depth 0.052 to 0.074 inch), so a flat blade works in tight spots where you cannot get a nut setter on it.
4) How many screws come in a box of Metallics QK15GRM?
The QK15GRM ships in boxes of 1,000, and 1,000 is the order minimum. Figure roughly 5.4 lbs per box.
5) What size is a #8 x 1 inch self-piercing screw, and how coarse is the thread?
The QK15GRM is a #8 diameter screw, 1 inch long, at 15 threads per inch. That thread count is the coarse self-piercing pitch meant for sheet metal and light gauge steel, not a machine screw pitch.
6) Does the QK15GRM screw have a built-in washer, and how wide does it bear?
Yes, it is a hex washer head. The integral washer runs 0.322 to 0.348 inch outside diameter with a washer thickness of 0.019 to 0.031 inch, and overall head height is 0.096 to 0.11 inch. That bearing surface spreads load over sheet metal and oversized holes so you do not pull the head through thin stock.
7) Is this screw hard enough to tap its own thread in steel studs?
It is heat treated to Rockwell C28-38 and made from AISI 1018 to 1022 steel, which is the standard case-hardened range for a self-tapping sheet metal screw. That is hard enough to form threads in light gauge steel; it is not a self-drilling screw for structural thickness material.
8) Will a gray zinc self-piercing screw hold up in a damp or outdoor location?
The QK15GRM is zinc plated steel with a gray head, which is a corrosion finish built for dry interior and protected work, typical of electrical rough-in. It is not a stainless or hot-dip coating, so for direct weather exposure or wet corrosive environments, step up to a stainless or heavier coated fastener.
9) Can I use a standard tapping screw dimension chart for these self-piercing screws?
No. Head dimensions on self-piercing screws differ from standard tapping screws, and there is no single industry standard for self-piercing screw dimensions. Treat the published head, washer, and slot figures as a guide, and if a hole or clearance in your assembly is tight, verify against a sample before you commit a 1,000 piece box.
How fast can I get the Metallics QK15GRM 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 QK15GRM come with a warranty?
Absolutely. The Metallics QK15GRM 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 QK15GRM?
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
Why buy the Metallics QK15GRM from ZenSupply?
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