Metallics TX1478 1/4-14 x 7/8 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$96.43
Metallics TX1478 1/4-14 x 7/8 in. 3/8 Hex Head Metal to Metal Self-Drilling Screws - #1 Drill Point - All-Weather - 50qty

Metallics TX1478 1/4-14 x 7/8 in. 3/8 Hex Head Metal to Metal Self-Drilling Screws - #1 Drill Point - All-Weather - Each

(No reviews yet) Write a Review

Model: TX1478
Selected Model is

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

$96.43
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like
1/4-14 x 7/8 in. 3/8 Hex Head Metal to Metal Self-Drilling Screws - #1 Drill Point - All-Weather - 50qty

  • 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

  • Features

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

Manufacturer Resources

Product Specs

Minimum Purchase:
50 units
Arra Compliant:
C
Buy American Compliant:
C
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
Field Application:
Construction
Hardness:
Rockwell C32-40
Language Code:
EN
Material Standard:
AISI 1016 - 1024
Order Minimum Imperial:
50
Order Minimum Uom Imperial:
EA
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
2.15 in
Product Length:
3 in
Product Weight:
0.54 lbs
Product Width:
3 in
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 TX1478 – Frequently Asked Questions

1) What is the Metallics TX1478 self-drilling screw used for?
The TX1478 is a 1/4-14 x 7/8 in. hex head self-drilling screw for metal-to-metal work: attaching standing seam roof clips and wall or roof metal panels to steel framing such as purlins and bar joists. The #1 drill point is sized for lighter steel framing, so it drills and taps in one pass with no pilot hole.
2) Does this 1/4-14 screw come with a sealing washer?
No. The TX1478 is a Type BSD metal-to-metal self-drilling screw supplied without a washer. If you are fastening exposed panel laps or anywhere weather-tight sealing is needed at the fastener head, you want a screw with a bonded EPDM sealing washer instead. This one is intended for clip and panel attachment to steel framing where the head is not the seal point.
3) How thick a steel can a #1 point self-drilling screw go through?
The #1 point is the lightest drill point in the self-drilling range, sized for thin gauge steel rather than heavy structural members. Metallics rates drill time at 2.5 seconds for a 1 mm thick plate. For heavier purlin or joist flanges, step up to a #3 or #5 point screw.
4) What size nut driver do I need for these Metallics hex head roofing screws?
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 nutsetter in a screw gun runs them.
5) Will these screws hold up outdoors on a metal roof?
The TX1478 carries a zinc and all-weather coating for exterior exposure, which is why it is spec'd for roof clip and panel attachment. It is a coated carbon steel screw (AISI 1016-1024), not stainless, so in coastal or chemically aggressive environments a stainless self-drilling fastener is the better call.
6) Will these screws snap when I drive them with an impact or a high-torque screw gun?
Minimum torsional strength is 150 lb-in, with the screws hardened to Rockwell C32-40. Metallics notes minimum torques are the same for stainless and steel self-drill screws. Keep the gun at drill-screw speed with a depth-sensing nose rather than an impact driver and you stay well inside that limit.
7) How are these 1/4-14 screws packaged and can I buy fewer than a jar?
They ship in a jar with a minimum order of 50 each, so the smallest purchase is a 50-count jar. Metallics offers other lengths and quantities of this screw by request if the job calls for a different grip.
How fast can I get the Metallics TX1478 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 TX1478 come with a warranty?
Absolutely. The Metallics TX1478 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 TX1478?
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 TX1478 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!