Metallics TX1478M 1/4-14 x 7/8...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,928.57
Metallics TX1478M 1/4-14 x 7/8 in. 3/8 Hex Head Metal to Metal Self-Drilling Screws - #1 Drill Point - All-Weather - 1000qty

Metallics TX1478M 1/4-14 x 7/8 in. 3/8 Hex Head Metal to Metal Self-Drilling Screws - #1 Drill Point - All-Weather - Each

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Model: TX1478M
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,928.57
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1/4-14 x 7/8 in. 3/8 Hex Head Metal to Metal Self-Drilling Screws - #1 Drill Point - All-Weather - 1000qty

  • Features

    • All-Weather Coating
    • 3/8 Hex Head with Hex Drive
    • #1 Drill Point
    • Minimum torques are the same for stainless and steel self-drill screws. Drill time is 2.5 seconds for a 1 mm thick plate.
    • 1/4-14 Diameter, 7/8" Length

  • Additional Notes

    • Fasteners for a!aching standing roof clips and wall/roof metal panels to steel framing (purlin/bar joist)|other sizes and quantities available by request

Manufacturer Resources

Product Specs

Minimum Purchase:
1000 units
Arra Compliant:
N
Buy American Compliant:
No
Dimensional Standard:
ASME B18.6.3-2010
Division:
Electrical H1
Drill Point Size:
#1
Drive Type:
Hex
Fastener Head Height:
0.172 - 0.19 in.
Fastener Head Type:
Hex
Fastener Head Width:
0.367 - 0.375 in.
Fastener Length:
8-Jul
Hardness:
Rockwell C32-40
Language Code:
EN
Material Standard:
AISI 1016 - 1024
Order Minimum Imperial:
1000
Order Minimum Uom Imperial:
TH
Pack Type:
Box
Product Group:
Fasteners
Screw Point Type:
Drill Point
Slot Depth:
0.083 - 0.101
Slot Width:
0.064 - 0.075
Sub Division:
Electrical-E H2
Thread Per Inch:
14
Thread Standard:
SAE J78 - 2013
Torsional Strength:
150 lb-in minimum
Washer Od:
0.480 - 0.520 in.
Washer Thickness:
0.030 - 0.050 IN
Width Across Corners:
0.409
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Type BSD Metal to Metal Self-Drilling Screw W/O Washer
Type2:
Type BSD Metal to Metal Self-Drilling Screw W/O Washer
Product Finish:
Zinc/All-Weather Coating
Product Details:
Type BSD Metal to Metal Self-Drilling Screw W/O Washer
Product Material:
All-Weather

Metallics TX1478M – Frequently Asked Questions

1) What is the Metallics TX1478M self-drilling screw used for?
The TX1478M is a 1/4-14 x 7/8 in. Type BSD metal-to-metal self-drilling screw with a #1 drill point, used to attach standing seam roof clips and wall or roof metal panels to steel framing such as purlins and bar joists. It drills and taps its own hole in steel, so no pilot hole is needed.
2) Does the TX1478M screw come with a sealing washer for roof panels?
No. The TX1478M is the Type BSD version without a washer. If you are fastening through exposed panel flats where water will sit on the head, you want a bonded EPDM sealing washer version instead. This one is intended for clip and panel attachment to steel framing where a washer is not required.
3) Will a 7/8 in. self-drilling screw be long enough for my steel purlin?
The TX1478M is 7/8 in. long overall with a #1 drill point, which is the short point sized for thinner steel. That length covers a metal panel or clip plus light-gauge to mid-gauge purlin or bar joist flange. For heavier structural steel you need a longer screw with a larger drill point; other sizes are available by request.
4) What size driver or socket do I need for these 1/4-14 hex head screws?
Use a 3/8 in. hex driver. The head measures 0.367 to 0.375 in. across the flats and 0.409 in. across the corners, with a head height of 0.172 to 0.19 in. A standard 3/8 magnetic hex bit in a screw gun handles them.
5) Is the All-Weather coating on these screws suitable for exterior roof and wall work?
Yes. The finish is zinc with an All-Weather coating, which is what makes this screw appropriate for exterior metal roof and wall panel attachment rather than interior-only use.
6) How much torque can a 1/4-14 self-drilling screw take before it snaps?
Minimum torsional strength is 150 lb-in. Set your screw gun clutch below that and back off the speed as the head seats. Minimum torques are the same for stainless and steel self-drill screws, and drill time runs about 2.5 seconds in a 1 mm thick plate.
7) Do these Metallics screws meet Buy American requirements for a federal job?
No. The TX1478M is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. If your project carries domestic sourcing requirements, this part will not satisfy them.
8) How are the TX1478M screws packaged and what is the minimum order?
They ship boxed, with a 1000 piece minimum order. Plan the buy in full thousands; other quantities are available by request.
How fast can I get the Metallics TX1478M 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 TX1478M come with a warranty?
Absolutely. The Metallics TX1478M 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 TX1478M?
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 TX1478M from ZenSupply?
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