Minerallac Company 21020TP - A machine screw with a flat head and spanner drive. It is made of stainless steel with a stainless finish. The screw size is 1/4-20 and the length is 1-1/4 inches.
Minerallac Company

21020TP

Alternate Item Number: 12112921

UPC: 085937113771


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Minimum Qty: 100

Multiplier: 100

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Overview

The Minerallac 21020TP is a 1/4-20 x 1-1/4" spanner drive sheet metal screw designed for secure fastening in industrial applications. Constructed from 18-8 stainless steel, this fastener provides excellent corrosion resistance and durability in harsh environments. The spanner drive head ensures secure engagement with tools, reducing cam-out and slippage during installation. This screw is ideal for fastening sheet metal up to 1/2" thick, with a 1/4-20 thread size compatible with standard nuts and pre-tapped holes. The 1-1/4" length provides adequate grip for most sheet metal applications. Made in the USA, the 21020TP meets industrial standards for reliability and performance. Suitable for HVAC, electrical, and general construction applications where stainless steel fasteners are required. The 1/4-20 thread size indicates 20 threads per inch, and the 1-1/4" length is measured from the bearing surface of the head to the tip of the screw. The 18-8 stainless steel composition offers superior resistance to rust and oxidation compared to standard steel fasteners. The spanner drive, also known as a snake-eye or pin-in-spanner drive, requires a specific tool for engagement, enhancing security. This particular screw is classified as a FHMS, indicating a Flat Head Machine Screw, though it is specifically designed for sheet metal applications.
  • 18-8 stainless steel construction for corrosion resistance
  • Spanner drive head for secure tool engagement and reduced cam-out
  • 1/4-20 thread size compatible with standard nuts and pre-tapped holes
  • 1-1/4" length suitable for sheet metal up to 1/2" thick
  • Made in the USA for reliable industrial performance
  • Made in the USA

Specifications

Application
For use with a pre-tapped hole or with a nut.
Drive Type
Spanner
Driver Size
#3
Finish
Stainless
Head Color
Silver
Head Diameter
0.477" IN
Head Height
0.153" IN
Head Type
Flat Head
Length
1-1/4" IN
Material
18-8 Stainless Steel
Material
Stainless Steel
Mounting Type
Spanner Drive
Size
1/4-20 IN
Thread Size
20
Thread Type
2A External Threads
Type
Machine Screw
A machine screw with external threads designed for use with a pre-tapped hole or a nut. It is made of stainless steel with a stainless finish. The screw is 1/4-20 size and 1-1/4 inches long, with a pan head and spanner drive.

23020TP

A machine screw with external threads designed for use with a pre-tapped hole or a nut. It is made of stainless steel with a stainless finish. The screw is 1/4-20 size and 1-1/4 inches long, with a pan head and spanner drive.
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11810.025

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Frequently Asked Questions about Minerallac Company

What are the main product lines offered by Minerallac Company?

Minerallac Company offers multiple comprehensive product lines including Minerallac Traditional (electrical fasteners), Strut Fittings, Stainless Steel Fasteners, Black Claw, Impact Staples, and Redmore. Their Traditional line features over a thousand electrical fastener variations covering conduit/cable/wire products, nail straps, beam clamps, metal stud & drywall accessories, acoustical supports, voice/data hardware, and miscellaneous electrical installation components.

What is Minerallac Company's warranty policy?

Minerallac Company provides a limited warranty that guarantees all products are free from defects in material and workmanship. If a product fails to meet this warranty, Minerallac's sole liability is to replace the product at no charge. The warranty is exclusive and does not cover consequential damages, lost profits, or implied warranties of merchantability or fitness for a particular purpose.

What industries and applications are Minerallac Company products used for?

Minerallac Company products are used extensively across electrical, construction, and industrial applications, including conduit and cable support, beam mounting, metal stud and drywall installation, voice/data infrastructure, and low voltage systems. Their product lines cover critical fastening solutions for electrical contractors, with specialized offerings in conduit hangers, straps, beam clamps, cable supports, and mounting hardware for various industrial environments.

What technical support does Minerallac Company offer?

Minerallac Company offers comprehensive technical support through multiple channels, including a toll-free customer service line at 800-927-3293, email support at [email protected], and online resources at www.minerallac.com. Their support covers product selection, technical specifications, and customer service for their extensive line of electrical fasteners, hangers, straps, and hardware across multiple product brands including Minerallac Traditional, Cully, Black Claw, IMPACT Staples, and Minerallac Stainless Steel. Support hours are 8:00 A.M. to 5:00 P.M. CT for their corporate office and 8:00 A.M. to 5:00 P.M. PT for their regional office.

What are the key features of Minerallac Company products?

Minerallac Company products feature a comprehensive range of electrical fasteners and hardware with exceptional versatility, including over 1,000 different sizes, styles, and finishes. Key features include multiple product lines such as Traditional, Strut Fittings, and Stainless Steel options with specialized finishes like 304/316 Stainless Steel, Hot-Dipped Galvanized, and Zinc Electroplate. Their products are engineered for electrical contractors, offering time-saving solutions with high-quality fasteners designed for durability, corrosion resistance, and worker safety across various installation environments.

What environmental ratings do Minerallac Company products have?

Minerallac Company products have robust environmental ratings, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13 certifications, CSA Type 1-4X, 12, and 13 ratings, and IEC 60529 IP66 protection. The products are WEEE and RoHS compliant, with UV and oil resistance, and can operate in extreme temperatures ranging from -55°C to 105°C, making them suitable for harsh industrial environments.

What accessories are available for Minerallac Company products?

Minerallac Company offers a comprehensive range of accessories across multiple product categories, including hardware, fasteners, and mounting solutions. Key accessories include stove bolts with nuts, wing nut washers, bar joist washers, stud clip adapters, brackets, perforated strapping, cable support options like J-hooks and bridle rings, box mounting brackets, outlet retainers, and various stud and drywall supports. Their accessories are available in multiple finishes such as stainless steel, hot-dipped galvanized, zinc electroplate, and powder-coated options.

How are Minerallac Company products typically installed?

Minerallac Company products are typically installed using a variety of specialized fastening solutions, including conduit hangers, straps, beam clamps, and mounting brackets designed for different electrical and construction applications. Installation methods vary by product type, with options for metal studs, drywall, beams, acoustical surfaces, and low voltage systems. The company offers multiple installation styles such as one-hole and two-hole straps, universal beam clamps, and specific mounting hardware to ensure secure and efficient attachment across diverse electrical and construction environments.

What communication protocols do Minerallac Company products support?

Minerallac Company's Brad product line supports multiple industrial communication protocols, including Ethernet, DeviceNet, PROFIBUS, Modbus, CANopen, Serial, AS-interface, and CC-Link. Their comprehensive portfolio covers over 40 industrial protocols, providing flexible communication solutions for various industrial automation applications from PC-based control to PLC systems.