NSI Industries QCSH20B - Concrete Screw, Steel material, 1/4 in. Size, 1-3/4 in. length, 5/16 in. head width, Hex head, 2000 Hr Mechanical Zinc, Corrosion Resistant finish, Quadrive drive type, 1000 per pack
NSI Industries

QCSH20B

Alternate Item Number: 39156

UPC: 639720391565


Documents & Media
Specification Sheet

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Minimum Qty: 1000

Multiplier: 1000

*Contact for lower quantities*

Overview

NSI Industries QCSH20B concrete screw is a precision-engineered steel fastener designed for heavy-duty fastening in concrete, masonry, and block applications. This 1/4" diameter x 1-3/4" length screw features a 5/16" hex head for superior torque transfer and a Quadrive drive type for secure installation without cam-out. The 2000-hour mechanical zinc finish provides corrosion resistance, extending service life in outdoor and industrial environments. Each screw is optimized for concrete applications, offering reliable holding power in structural and non-structural installations. The Quadrive drive reduces installation time by eliminating the need for pre-drilling in many cases, while the hex head allows for easy wrench tightening in tight spaces. This 1000-piece bulk pack is ideal for contractors, builders, and industrial suppliers requiring high-volume, consistent-quality fasteners for concrete work. Typical applications include anchoring fixtures, securing metal tracks, mounting electrical panels, and attaching hardware to concrete substrates. The screw's steel construction ensures high shear and tensile strength, making it suitable for both light and medium-duty concrete fastening tasks. Compatible with standard concrete anchors and drill bits, the QCSH20B delivers predictable performance in demanding construction environments.
  • 1/4" diameter x 1-3/4" length steel concrete screw
  • Hex head (5/16") with Quadrive drive for secure installation
  • 2000-hour mechanical zinc finish for corrosion resistance
  • 1000 screws per bulk pack for high-volume applications
  • Ideal for concrete, masonry, and block fastening

Specifications

Application
Electrical, Plumbing, Heating and Air Conditioning Industries
Head Type
Hexagon
Head Width
5/16 IN
Length
1-3/4 in
Material
Steel
Size
1/4 IN
Type
Tapping Screw
Package Dimensions (L x W x H)
7.25 IN x 6.25 IN x 6 IN
Package Dimensions (L x W x H)
18.415 cm x 15.875 cm x 15.24 cm
Package Weight (Imperial)
18.000 L
Package Weight (Metric)
8.165 kg
Concrete Screw, Steel material, 1/4 in. Size, 1-3/4 in. length, 5/16 in. head width, Hex head, 2000 Hr Mechanical Zinc, Corrosion Resistant finish, CD5 drill stock number, Quadrive drive type, USA Made, 100 per pack

QCSH20

Concrete Screw, Steel material, 1/4 in. Size, 1-3/4 in. length, 5/16 in. head width, Hex head, 2000 Hr Mechanical Zinc, Corrosion Resistant finish, CD5 drill stock number, Quadrive drive type, USA Made, 100 per pack
Tapcon™ concrete screw designed for fastening applications in concrete, block, and brick. It is made of steel with a Blue Climaseal® coating for extra corrosion protection. The screw is 3/16 in size and 1-3/4 in long, with a hex washer head and patented Advance Threadform.

60128

Tapcon™ concrete screw designed for fastening applications in concrete, block, and brick. It is made of steel with a Blue Climaseal® coating for extra corrosion protection. The screw is 3/16 in size and 1-3/4 in long, with a hex washer head and patented Advance Threadform.

Frequently Asked Questions

What product series does this specification sheet cover?

This specification sheet applies to all QuaDrive Concrete Screws in the QCSH series.

What material and finish does the screw have?

It is a steel mechanical screw with zinc/corrosion resistant protection.

What screw diameters are listed?

The listed nominal diameters are 3/16 in and 1/4 in.

What lengths are available for the 3/16 in screws?

The 3/16 in screws are listed in 1-1/4 in, 1-3/4 in, and 2-1/4 in lengths.

What lengths are available for the 1/4 in screws?

The 1/4 in screws are listed in 1-1/4 in, 1-3/4 in, 2-1/4 in, and 2-3/4 in lengths.

What is the width across flats for 3/16 in screws?

For 3/16 in screws, the width across flats is .244 to .250 in.

What is the full head height for 3/16 in screws?

For 3/16 in screws, the full head height is .140 to .145 in.

What is the width across flats for 1/4 in screws?

For 1/4 in screws, the width across flats is .307 to .312 in.

What is the full head height for 1/4 in screws?

For 1/4 in screws, the full head height is .247 to .254 in.

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