Authorized Minerallac Company Distributor
Minerallac Company 55249J - A hex tap bolt / hex head cap screw made of steel with a zinc plated finish. It is 3.000 in long and sized 5/16"-18 x 3" with a 0.313 in diameter and 18 threads. The sheet states it is used to mount motors to machinery and is also popular in automotive and truck repair.
Minerallac Company

55249J

UPC: 085937054548


Documents & Media
Specification SheetManufacturer Product Website

Contact for Pricing

Minimum Qty: 100

Multiplier: 100

*Contact for lower quantities*

Overview

The Minerallac 55249J is a Grade 5 hex head cap screw designed for heavy-duty industrial applications requiring high strength and corrosion resistance. This 5/16-18 x 3" partial-threaded fastener features a medium carbon steel construction quenched and tempered for superior durability, with a zinc-plated finish to resist rust and corrosion in demanding environments. This hex cap screw meets Grade 5 specifications, providing a tensile strength of 120,000 PSI and proof load of 85,000 PSI—ideal for securing machinery, motors, and structural components where reliability is critical. The partial threading (approximately 1.5" thread length) allows for precise positioning while maintaining maximum clamping force. Manufactured by Minerallac under the Cully sub-brand, this fastener is RoHS compliant and suitable for use in industrial, automotive, and construction applications where medium-duty fastening is required. Standard packaging includes 100 pieces per jar with master cartons of 600 units for efficient inventory management. The 5/16-18 thread size is compatible with standard tapped holes, making it a versatile choice for OEMs and maintenance teams. Choose the 55249J for applications requiring a balance of strength, corrosion protection, and cost-effective performance.
  • Grade 5 steel construction with 120,000 PSI tensile strength
  • 5/16-18 x 3" size with partial threading for precise positioning
  • Zinc-plated finish for corrosion resistance in industrial environments
  • Medium carbon steel quenched and tempered for durability
  • RoHS compliant for global regulatory compliance

Specifications

Application
Used to mount motors to machinery also popular in automotive and truck repair.
Diameter
0.313 in
Diameter
7.9502 mm
Finish
Zinc Plated
Head Type
Hex
Length
3 in
Length
76.2 mm
Material
Steel
Size
5/16"–18 x 3"
Thread
18 TPI
Type
Hex Tap Bolt
Package Dimensions (L x W x H)
4 IN x 4 IN x 6.25 IN
Package Dimensions (L x W x H)
10.16 cm x 10.16 cm x 15.875 cm
Package Weight (Imperial)
6.9100 L
Package Weight (Metric)
3.1344 kg
This is a hex tap bolt for use in drilled and tapped holes threaded full length. It is made of steel with a zinc plated finish. The bolt is 3/4"-10 x 3" with a 0.750" diameter and 3.000" length.

56248

This is a hex tap bolt for use in drilled and tapped holes threaded full length. It is made of steel with a zinc plated finish. The bolt is 3/4"-10 x 3" with a 0.750" diameter and 3.000" length.
3/4-10 x 3-1/2" Hex Tap Bolt Zinc

HTB83

3/4-10 x 3-1/2" Hex Tap Bolt Zinc
Strut Non Metallic Hex Head Bolt 3/8 Inch - 2-1/2 Inch

NM-F38212

Strut Non Metallic Hex Head Bolt 3/8 Inch - 2-1/2 Inch
This is a 5/16-18 x 4 inch hex head cap screw, listed as Grade 5 and partial threaded. It is made of steel with a zinc plated finish. The sheet states it is used to mount motors to machinery and is also popular in automotive and truck repair.

55265J

This is a 5/16-18 x 4 inch hex head cap screw, listed as Grade 5 and partial threaded. It is made of steel with a zinc plated finish. The sheet states it is used to mount motors to machinery and is also popular in automotive and truck repair.
3/8-16 x 1-1/2" Hex Head Bolt, Grade 2, Partial Threaded, Hot Dip Galvanized, Jar

55424HGJ

3/8-16 x 1-1/2" Hex Head Bolt, Grade 2, Partial Threaded, Hot Dip Galvanized, Jar
This is a hex tap bolt for use in drilled and tapped holes threaded full length. It is made of steel with a zinc plated finish. The bolt is 1.500 in long and sized 3/8 in-16 x 1-1/2 in, with a 0.375 in diameter and 16 threads.

55426

This is a hex tap bolt for use in drilled and tapped holes threaded full length. It is made of steel with a zinc plated finish. The bolt is 1.500 in long and sized 3/8 in-16 x 1-1/2 in, with a 0.375 in diameter and 16 threads.
This is a hex tap bolt for use in drilled and tapped holes threaded full length. It is made of steel with a bright finish. The bolt is 1.500 in long and sized 3/8 in-16 x 1-1/2 in, with a 0.375 in diameter and 16 threads.

55426BFG

This is a hex tap bolt for use in drilled and tapped holes threaded full length. It is made of steel with a bright finish. The bolt is 1.500 in long and sized 3/8 in-16 x 1-1/2 in, with a 0.375 in diameter and 16 threads.
1/2-13 x 1-1/4" Hex Head Bolt, Grade 2, Fully Threaded, Hot Dip Galvanized, Jar

55820HGJ

1/2-13 x 1-1/4" Hex Head Bolt, Grade 2, Fully Threaded, Hot Dip Galvanized, Jar

Frequently Asked Questions

Is this screw fully or partially threaded?

This 55249J screw is partially threaded with approximately 1.5 inches of thread length on a 3-inch bolt.

What is the tensile strength of this Grade 5 screw?

Grade 5 hex cap screws have a tensile strength of 120,000 PSI and a proof load of 85,000 PSI, meeting ASTM A325 standards for medium-duty applications.

What materials is this screw made from?

The screw is made from medium carbon steel that is quenched and tempered to achieve Grade 5 specifications.

What applications is this hex cap screw suitable for?

This Grade 5 hex cap screw is suitable for securing motors to machinery, automotive repairs, and general industrial fastening where medium-duty strength is required.

What is the country of origin for this fastener?

The country of origin is not specified in the manufacturer's catalog for SKU 55249J.

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.