Simpson Strong-Tie T12300HDUM (#12 x 3") Self-Drilling Hex-Washer Head SS Screw - Type 316 (1000 Pack)
SKU: 20532601490

Simpson Strong-Tie T12300HDUM (#12 x 3") Self-Drilling Hex-Washer Head SS Screw - Type 316 (1000 Pack)

$352.07 $391.19
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

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Description

Simpson Strong-Tie T12300HDUM (#12 x 3") Self-Drilling Hex-Washer Head SS Screw - Type 316 (1000 Pack)Simpson Strong Tie T12300HDUM Description The Self Drilling Hex Washer Head Screw is a durable and corrosion resistant fastener, ideal for aluminum and fiberglass applications. Simpson Strong Tie T12300HDUM Includes (1000) Self Drilling Hex Washer Head Screw Simpson Strong Tie T12300HDUM Features Indented hex washer head for secure fastening Tapping screw thread for easy installation #3 drill point for precise drilling Simpson Strong Tie T12300HDUM

Simpson Strong-Tie T12300HDUM Description

The Self-Drilling Hex-Washer Head Screw is a durable and corrosion-resistant fastener, ideal for aluminum and fiberglass applications.

Simpson Strong-Tie T12300HDUM Includes

  • (1000) Self-Drilling Hex-Washer Head Screw

Simpson Strong-Tie T12300HDUM Features

  • Indented hex-washer head for secure fastening
  • Tapping screw thread for easy installation
  • #3 drill point for precise drilling

Simpson Strong-Tie T12300HDUM Applications

  • Aluminum and fiberglass fastening

Simpson Strong-Tie T12300HDUM Specifications

Fastener Type Hand-Drive Screw
Application Fastening for Cold-Formed Steel
Screw Size #12
Length 3 in.
Drive Type 5/16 in. Hex
Head Type Hex Washer Head
Thread Type Tapping Threads
TPI 14
Point Type Drill Point
Coating/Material Type 316 Stainless Steel
Packaging Quantity 1000

NOTE: Types 316 and 305 stainless steel provide superior corrosion resistance and are suitable for softer materials such as aluminum and fiberglass (not steel).

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 20532601490

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4.5 ★★★★★
Based on 744 reviews
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Product Reviews
R
Verified Purchase
Robert O.
Fort Morgan, US
★★★★★ 5
Very Nice! For the Price.
Color: Gray, Style: Yoga Mat
Very Nice!, for the price. It’s not as dense as a $50-$80 mat, but it’s $18. Plenty comfortable. My biggest concern was if it would have that cheap China Smell. No chemical smell at all. This mat is quite nice and functional.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
L
Verified Purchase
Lorenz Weissel
Draper, US
★★★★★ 5
Great value, nice and thick
Color: Green, Style: Yoga Mat
This mat is closer to a gym mat than a yoga mat, which was a very pleasant surprise. I just needed something for daily stretching, and this is perfect. Way more plush than a yoga mat, and a lot less expensive than the trendier mat options. Seems to be made well, but only time will tell.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 4, 2026
R
Verified Purchase
rebecca rickey
Houston, US
★★★★★ 5
Soft and cushiony but supportive
Color: Pink Dahlia, Size: 1 inch
Definitely strong cushioned floor mat Very comfortable to do exercises on knees and back good quality and easy to roll up Lightweight but strong and dense I love the pink color too Highly recommend
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
P
Verified Purchase
Pat & Gen
Charlottesville, US
★★★★★ 5
Best mat I have seen in a while.
Color: Blue Mist, Size: 1 inch
I'm glad I bought this it is perfect thickness (very soft and comfortable) and it is easy to store. Easy to pull out and use as well as good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
J
Verified Purchase
Jullie
Boise, US
★★★★★ 5
over 1+ years use and it’s still great quality 😩
Color: Violet Haze, Size: 1 inch
have had this mat since june 2024 and it’s still in amazing quality!! it’s so comfy, thick and soft which is why i bought it. i feel like i could use this thing on a rocky ass ground and i wouldn’t feel anything but squishy-ness lol so protection is so good. the color is still vibrant too (i got the lavender color) which i love!! really makes such a huge difference in my energy when i workout, making me feel like dat gooorl 👏🏼 i’m 5”2’ so there’s ample space for me. definitely slip resistant, im able to perform lunges with one leg on and off. also love the band you can wrap around it so you can transport it anywhere :) just purchased a black one for my hubby which is why i’m here again hehe
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Reviewed in the United States on December 5, 2025

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