Metallics JTEKD38 5/16 x 3/4 i...
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Metallics JTEKD38 5/16 x 3/4 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - 100qty

Metallics JTEKD38 5/16 x 3/4 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - Each

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Model: JTEKD38
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5/16 x 3/4 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - 100qty

  • Features

    • 5/16 Diameter, 3/4" Length
    • #2 Drill Point
    • 5/16 Indented Hex Head with Hex Drive
    • Steel Zinc Material
    • Minimum torques are the same for stainless and steel self-drill screws. Drill time is 2.5 seconds for a 1 mm thick plate.

  • Additional Notes

    • Other sizes and quantities available by request. | SAE J78 does not include Specifications for #7 diameter drill screws. | This table is only a guide and does not constitute a warranty of any type.

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
C
Buy American Compliant:
C
Dimensional Standard:
ASME B18.6.3-2010
Division:
Electrical H1
Drill Point Size:
#2
Drive Type:
Hex
Fastener Head Height:
0.208 - 0.23 in.
Fastener Head Type:
Indented Hex
Fastener Head Width:
0.489 - 0.5 in.
Fastener Length:
4-Mar
Hardness:
Rockwell C32-40
Language Code:
EN
Material Standard:
AISI 1016 - 1024
Order Minimum Imperial:
100
Order Minimum Uom Imperial:
CT
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
3.6 in
Product Length:
3 in
Product Weight:
2.69 lbs
Product Width:
3 in
Screw Point Type:
Drill Point
Slot Depth:
0.1 - 0.122
Slot Width:
0.072 - 0.084
Sub Division:
Electrical-E H2
Thread Per Inch:
12
Thread Standard:
SAE J78 - 2013
Washer Od:
0.624 - 0.676 in.
Washer Thickness:
0.035 - 0.055 IN
Width Across Corners:
0.545
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Type BSD Self-Drilling & Tapping Screw
Type2:
Type BSD Self-Drilling & Tapping Screw
Series:
JTEKD
Product Finish:
Zinc
Product Details:
Type BSD Self-Drilling & Tapping Screw
Product Material:
Steel Zinc

Metallics JTEKD38 – Frequently Asked Questions

1) What size drill bit and driver do I need for the Metallics JTEKD38 self-drilling screw?
No pilot drill at all. The JTEKD38 has a #2 drill point that cuts its own hole, so you drive it straight into the steel. The head is an indented hex measuring 0.489 to 0.5 inch across the flats and 0.545 across the corners, so a 1/2 inch hex driver or nut setter is what you want in the impact.
2) How thick a steel can a #2 point self-drilling screw go through?
A #2 drill point is the light-to-medium gauge point, meant for sheet and light structural steel rather than heavy plate. Metallics rates drill time at 2.5 seconds through a 1 mm thick plate. For heavy bar joist or thick structural steel you want a higher point number with a longer flute.
3) Does the Metallics JTEKD38 come with a washer, or do I add one?
The washer is built into the screw as a bonded head washer, so nothing extra to order. It runs 0.624 to 0.676 inch outside diameter and 0.035 to 0.055 inch thick, which gives you a bearing surface wider than the 1/2 inch hex head for clamping strap, clip, or light sheet without pulling through.
4) What thread pitch is the JTEKD38 and will it match a tapped hole I already have?
Threads are 12 per inch on a 5/16 diameter body, cut to SAE J78-2013 for the thread form and ASME B18.6.3-2010 for the dimensions. That is a tapping thread, not a machine thread, so it forms its own threads in drilled steel rather than matching a pre-tapped 5/16-18 or 5/16-24 hole.
5) Is the Metallics JTEKD38 screw OK for outdoor or damp locations?
It is carbon steel, AISI 1016-1024, with a zinc plated finish. Zinc plating is a mild-corrosion coating suited to dry interior and protected work. For sustained exposure, coastal air, or wet locations, step up to a stainless or a hot-dip/coated self-drilling screw instead.
6) Do the Metallics JTEKD38 screws meet Buy American or ARRA requirements on a public job?
Both the ARRA and Buy American fields on the JTEKD38 are flagged compliant, though country of origin is listed as China. On a federally funded project, check which standard your specification actually invokes, since those two designations are not interchangeable.
7) Will a 3/4 inch long self-drilling screw be long enough for my strut and strap work?
At 3/4 inch overall on a 5/16 body, the JTEKD38 is a short fastener. Subtract the washer thickness and the drill flute and you have limited thread engagement, so it suits clamping thin material tight to a steel substrate, clips, straps, and hangers. Stacked layers or standoff conditions need a longer screw.
8) How are these Metallics self-drilling screws packaged and what is the minimum order?
They ship in a jar, 100 count minimum. Figure roughly 2.69 lbs for the packed jar. That is the buying unit, so an electrician stocking a van or a shop crib is ordering in hundreds, not individual pieces.
9) Is the JTEKD38 hard enough to drill through steel without the point walking or burning up?
Case hardness runs Rockwell C32-40, which is the range a self-drilling screw needs so the point stays harder than the base metal it is cutting. Keep the driver at moderate RPM and constant pressure; running dry at high speed is what kills a drill point, not the screw's hardness.
10) How much does the head of the JTEKD38 stand off the surface?
Head height is 0.208 to 0.23 inch, plus a washer of 0.035 to 0.055 inch under it. Call it a quarter inch of profile above the work. If you are fastening under a panel, a track, or behind a device that needs to sit flat, account for that stand-off, an indented hex head does not countersink.
How fast can I get the Metallics JTEKD38 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 JTEKD38 come with a warranty?
Absolutely. The Metallics JTEKD38 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 JTEKD38?
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 JTEKD38 from ZenSupply?
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