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High-Quality Tap Bolts and Tap Screws


Custom & Standard Tap Bolts & Tap Screws | U-Bolt-It

What is a Tap Bolt?

A tap bolt (also commonly referred to as a tap screw) is a specialized hex head bolt featuring a fully threaded shank that extends entirely from the base of the head to the tip. Unlike standard bolts that require a separate mating nut to secure a joint, tap bolts are specifically designed to be driven directly into pre-drilled and tapped holes, effectively taking the place of a traditional stud and nut assembly.

Common Industry Applications

Because of their fully threaded design and reliable, full-length engagement, tap bolts are highly versatile fasteners used securely across a wide variety of projects. Common applications include:

  • Marine applications and boat building
  • Exterior woodworking and heavy timber construction
  • Machinery and motor assemblies requiring tapped holes
  • General structural projects requiring full-thread engagement

Available Materials and Custom Manufacturing

As a leading distributor and manufacturer of premium fasteners, U-Bolt-It supplies standard and custom tap screws tailored to your project's exact needs. To ensure maximum durability in harsh environments, such as marine or outdoor settings, our fully threaded fasteners are available in a wide variety of industrial-grade materials, including plain steel, hot-dipped galvanized steel, and highly corrosion-resistant stainless steel.

Request a Quote Today

Need help finding the perfect fully threaded fastener for your next project? Contact our team directly by phone or by using our secure online form to submit your specifications. You can also give us a call today to speak directly with our fastener specialists. We look forward to working with you!

Types of Tap Bolts & Tap Screws


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SKU NAME DIAMETER THREAD LENGTH DETAILS
HHTAPSS0430250 7/16-14 X 2 1/2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 7/16 14 2 1/2
HHTAP3S0870500 7/8-9 X 5 316 STAINLESS STEEL HEX HEAD TAP BOLT 7/8 9 5
HHTAPSS0620250 5/8-11 X 2 1/2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 5/8 11 2 1/2
HHTAP3S0310200 5/16-18 X 2 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/16 18 2
HHTAP3S0310150 5/16-18 X 1 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/16 18 1 1/2
HHTAP3S0310100 5/16-18 X 1 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/16 18 1
HHTAP3S0310250 5/16-18 X 2 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/16 18 2 1/2
HHTAP3S0310500 5/16-18 X 5 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/16 18 5
HHTAP3S0620150 5/8-11 X 1 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/8 11 1 1/2
HHTAP3S0620200 5/8-11 X 2 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/8 11 2
HHTAP3S0620225 5/8-11 X 2 1/4 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/8 11 2 1/4
HHTAP3S0620275 5/8-11 X 2 3/4 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/8 11 2 3/4
HHTAP3S0620300 5/8-11 X 3 316 STAINLESS STEEL HEX HEAD TAP BOLT 5/8 11 3
HHTAPSS0620400 5/8-11 X 4 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 5/8 11 4
HHTAPSS0620350 5/8-11 X 3 1/2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 5/8 11 3 1/2
HHTAPSS0310400 5/16-18 X 4 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 5/16 18 4
HHTAPSS0310300 5/16-18 X 3 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 5/16 18 3
HHTAPSS0310200 5/16-18 X 2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 5/16 18 2
HHTAP3S0750175 3/4-10 X 1 3/4 316 STAINLESS STEEL HEX HEAD TAP BOLT 3/4 10 1 3/4
HHTAP3S0750250 3/4-10 X 2 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 3/4 10 2 1/2
HHTAPSS0750175 3/4-10 X 1 3/4 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 3/4 10 1 3/4
HHTAPSS0750500 3/4-10 X 5 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 3/4 10 5
HHTAP3S0750450 3/4-10 X 4 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 3/4 10 4 1/2
HHTAPSS0370300 3/8-16 X 3 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 3/8 16 3
HHTAPSS0370150 3/8-16 X 1 1/2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 3/8 16 1 1/2
HHTAP3S0370125 3/8-16 X 1 1/4 316 STAINLESS STEEL HEX HEAD TAP BOLT 3/8 16 1 1/4
HHTAP3S0370200 3/8-16 X 2 316 STAINLESS STEEL HEX HEAD TAP BOLT 3/8 16 2
HHTAP3S0370250 3/8-16 2 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 3/8 16 2 1/2
HHTAP3S0500275 1/2-13 X 2 3/4 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 2 3/4
HHTAP3S0500300 1/2-13 X 3 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 3
HHTAP3S1000800 1-8 X 8 316 STAINLESS STEEL HEX HEAD TAP BOLT 1 8 8
HHTAP3S0500350 1/2-13 X 3 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 3 1/2
HHTAP3S0500425 1/2-13 X 4 1/4 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 4 1/4
HHTAP3S0500500 1/2-13 X 5 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 5
HHTAP3S1000400 1-8 X 4 316 STAINLESS STEEL HEX HEAD TAP BOLT 1 8 4
HHTAP3S1000450 1-8 X 4 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 1 8 4 1/2
HHTAP3S1000600 1-8 X 6 316 STAINLESS STEEL HEX HEAD TAP BOLT 1 8 6
HHTAPSS0250150 1/4-20 1 1/2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/4 20 1 1/2
HHTAP3S0250150 1/4-20 X 1 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/4 20 1 1/2
HHTAPSS0250175 1/4-20 1 3/4 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/4 20 1 3/4
HHTAPSS0250200 1/4-20 X 2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/4 20 2
HHTAPSS0250300 1/4-20 X 3 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/4 20 3
HHTAPSS0250450 1/4-20 X 4 1/2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/4 20 4 1/2
HHTAPSS0500100 1/2-13 X 1 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 1
HHTAPSS0500200 1/2-13 X 2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 2
HHTAPSS0500300 1/2-13 X3 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 3
HHTAPSS0500350 1/2-13 X 3 1/2 18-8 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 3 1/2
HHTAP3S0250125 1/4-20 X 1 1/4 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/4 20 1 1/4
HHTAP3S0500250 1/2-13 X 2 1/2 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/2 13 2 1/2
HHTAP3S0250175 1/4-20 X 1 3/4 316 STAINLESS STEEL HEX HEAD TAP BOLT 1/4 20 1 3/4