► Securefix | UNC Bolts

Securefix UNC Bolts Australia for Heavy Duty Fastening & Structural Applications Fastening strength starts with thread design. Securefix UNC bolts Australia are widely used across construction, mechanical assembly & industrial environments where coarse thread engagement is critical for holding power under load. Unlike fine thread bolts, UNC hex head bolts...

Securefix UNC Bolts Australia for Heavy Duty Fastening & Structural Applications

Fastening strength starts with thread design. Securefix UNC bolts Australia are widely used across construction, mechanical assembly & industrial environments where coarse thread engagement is critical for holding power under load.

Unlike fine thread bolts, UNC hex head bolts use a coarser pitch that bites deeper into material. That deeper engagement makes them ideal for softer metals, structural connections & applications exposed to vibration. Coarse thread bolts reduce stripping risk, improve grip & allow faster installation without compromising strength.

Across fabrication, maintenance & heavy-duty assembly work, UNC bolts are relied on where durability matters more than fine adjustment. For secure installs, trades pair these with Hex Nut, Flat Washer & Spring Washer to maintain clamping force. Supporting fastening components like Structural Fasteners & Bolts, Lock Nut, Flange Nut & Sealing Washer help complete secure, long-lasting assemblies across jobsite environments.

UNC bolts are used for structural fastening where coarse threads are required to hold under load.

What’s in This Collection:

► UNC hex head bolts
‣ Standard hex head bolts with Unified National Coarse threads for structural & mechanical fastening

► Coarse thread UNC bolts
‣ Deep thread pitch designed for strong engagement in softer materials & high-load applications

► Imperial UNC bolt sizes (1/4", 5/16", 3/8", 1/2")
‣ Common industry sizes for compatibility with imperial fasteners & equipment

► Zinc plated UNC bolts
‣ Corrosion resistant finish suited for general outdoor & workshop environments

► High tensile UNC bolts
‣ Engineered for load-bearing applications where strength & reliability are critical

► Partially threaded UNC bolts
‣ Improved shear strength for structural connections & aligned assemblies

► Fully threaded UNC bolts
‣ Full-length thread engagement for adjustable fastening & clamping

► UNC hex bolts for construction & mechanical use
‣ Suitable for steelwork, fabrication, machinery assembly & general trade applications

Choosing the correct UNC bolt size, thread type & strength rating ensures proper load distribution & long-term performance.

Trade Applications for UNC Bolts

Coarse thread fastening is used where failure isn’t acceptable & holding power must be maintained under load, movement & real jobsite conditions.

► Structural construction & steelwork
 ‣ Secure beams, brackets & load-bearing components where failure under load can compromise the entire structure

► Mechanical assembly & fabrication
 ‣ Fasten components exposed to vibration where fine threads would loosen, strip or fail over time

► Industrial maintenance & repair
 ‣ Replace worn or damaged fasteners in heavy-duty equipment where downtime & failure cost time & money

► Automotive & transport systems
 ‣ Hold components under constant movement, shock loads & repeated stress without backing off

► Machinery installation & plant setups
 ‣ Lock critical connections in place where consistent clamping force is required for safe operation

► Workshop & fabrication environments
 ‣ Provide reliable fastening across builds where strength, speed & repeatability matter

When fastening failure isn’t an option, coarse thread UNC bolts are used to hold under pressure.

 

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  • Securefix Gr8 UNC High Tensile Bolt 9/16 x 4
    Securefix - Gr8 UNC High Tensile Bolt 9/16" x 4" | HTBOC9164
    Gr8 UNC High Tensile Bolt 9/16 X 4 | HTBOC9164 The Gr8 UNC High Tensile Bolt 9/16 X 4 kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners, this kit...
    $141.00
    $165.88
    $141.00
  • Securefix Gr8 UNC High Tensile Bolt 9/16 x 3 ½
    Securefix - Gr8 UNC High Tensile Bolt 9/16" x 3-1/2" | HTBOC916312
    Gr8 UNC High Tensile Bolt 9/16 X 3 ½ | HTBOC916312 The Gr8 UNC High Tensile Bolt 9/16 X 3 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $127.91
    $150.48
    $127.91
  • Securefix Gr8 UNC High Tensile Bolt 9/16 x 2 ½
    Securefix - Gr8 UNC High Tensile Bolt 9/16" x 2-1/2" | HTBOC916212
    Gr8 UNC High Tensile Bolt 9/16 X 2 ½ | HTBOC916212 The Gr8 UNC High Tensile Bolt 9/16 X 2 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $98.84
    $116.28
    $98.84
  • Securefix Gr8 UNC High Tensile Bolt 9/16 x 2 ¼
    Securefix - Gr8 UNC High Tensile Bolt 9/16" x 2-1/4" | HTBOC916214
    Gr8 UNC High Tensile Bolt 9/16 X 2 ¼ | HTBOC916214 The Gr8 UNC High Tensile Bolt 9/16 X 2 ¼ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $95.93
    $112.86
    $95.93
  • Securefix Gr8 UNC High Tensile Bolt 9/16 x 2
    Securefix - Gr8 UNC High Tensile Bolt 9/16" x 2" | HTBOC9162
    Gr8 UNC High Tensile Bolt 9/16 X 2 | HTBOC9162 The Gr8 UNC High Tensile Bolt 9/16 X 2 kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners, this kit...
    $79.95
    $94.06
    $79.95
  • Securefix Gr8 UNC High Tensile Bolt 9/16 x 1 ½
    Securefix - Gr8 UNC High Tensile Bolt 9/16" x 1-1/2" | HTBOC916112
    Gr8 UNC High Tensile Bolt 9/16 X 1 ½ | HTBOC916112 The Gr8 UNC High Tensile Bolt 9/16 X 1 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $43.26
    $78.66
    $43.26
  • Securefix Gr8 UNC High Tensile Bolt 9/16 x 1 ¼
    Securefix - Gr8 UNC High Tensile Bolt 9/16" x 1-1/4" | HTBOC916114
    Gr8 UNC High Tensile Bolt 9/16 X 1 ¼ | HTBOC916114 The Gr8 UNC High Tensile Bolt 9/16 X 1 ¼ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $42.33
    $76.96
    $42.33
  • Securefix Gr8 UNC High Tensile Bolt 7/8 x 7
    Securefix - Gr8 UNC High Tensile Bolt 7/8" x 7" | HTBOC787
    Gr8 UNC High Tensile Bolt 7/8 X 7 | HTBOC787 The Gr8 UNC High Tensile Bolt 7/8 X 7 kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners, this kit...
    $432.63
    $786.60
    $432.63
  • Securefix Gr8 UNC High Tensile Bolt 7/8 x 6 ½
    Securefix - Gr8 UNC High Tensile Bolt 7/8" x 6-1/2" | HTBOC78612
    Gr8 UNC High Tensile Bolt 7/8 X 6 ½ | HTBOC78612 The Gr8 UNC High Tensile Bolt 7/8 X 6 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $418.53
    $760.96
    $418.53
  • Securefix Gr8 UNC High Tensile Bolt 7/8 x 5 ½
    Securefix - Gr8 UNC High Tensile Bolt 7/8" x 5-1/2" | HTBOC78512
    Gr8 UNC High Tensile Bolt 7/8 X 5 ½ | HTBOC78512 The Gr8 UNC High Tensile Bolt 7/8 X 5 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $329.18
    $598.50
    $329.18
  • Securefix Gr8 UNC High Tensile Bolt 7/8 x 5
    Securefix - Gr8 UNC High Tensile Bolt 7/8" x 5" | HTBOC785
    Gr8 UNC High Tensile Bolt 7/8 X 5 | HTBOC785 The Gr8 UNC High Tensile Bolt 7/8 X 5 kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners, this kit...
    $310.37
    $564.30
    $310.37
  • Securefix Gr8 UNC High Tensile Bolt 7/8 x 3
    Securefix - Gr8 UNC High Tensile Bolt 7/8" x 3" | HTBOC783
    Gr8 UNC High Tensile Bolt 7/8 X 3 | HTBOC783 The Gr8 UNC High Tensile Bolt 7/8 X 3 kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners, this kit...
    $188.10
    $342.00
    $188.10
  • Securefix Gr8 UNC High Tensile Bolt 7/8 x 2 ½
    Securefix - Gr8 UNC High Tensile Bolt 7/8" x 2-1/2" | HTBOC78212
    Gr8 UNC High Tensile Bolt 7/8 X 2 ½ | HTBOC78212 The Gr8 UNC High Tensile Bolt 7/8 X 2 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $169.29
    $307.80
    $169.29
  • Securefix Gr8 UNC High Tensile Bolt 7/8 x 2 ¼
    Securefix - Gr8 UNC High Tensile Bolt 7/8" x 2-1/4" | HTBOC78214
    Gr8 UNC High Tensile Bolt 7/8 X 2 ¼ | HTBOC78214 The Gr8 UNC High Tensile Bolt 7/8 X 2 ¼ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $159.88
    $290.70
    $159.88
  • Securefix Gr8 UNC High Tensile Bolt 7/8 x 2
    Securefix - Gr8 UNC High Tensile Bolt 7/8" x 2" | HTBOC782
    Gr8 UNC High Tensile Bolt 7/8 X 2 | HTBOC782 The Gr8 UNC High Tensile Bolt 7/8 X 2 kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners, this kit...
    $150.48
    $273.60
    $150.48
  • Securefix Gr8 UNC High Tensile Bolt 5/8 x 6 ½
    Securefix - Gr8 UNC High Tensile Bolt 5/8" x 6-1/2" | HTBOC58612
    Gr8 UNC High Tensile Bolt 5/8 X 6 ½ | HTBOC58612 The Gr8 UNC High Tensile Bolt 5/8 X 6 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $305.24
    $359.10
    $305.24
  • Securefix Gr8 UNC High Tensile Bolt 5/8 x 6
    Securefix - Gr8 UNC High Tensile Bolt 5/8" x 6" | HTBOC586
    Gr8 UNC High Tensile Bolt 5/8 X 6 | HTBOC586 The Gr8 UNC High Tensile Bolt 5/8 X 6 kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners, this kit...
    $148.60
    $270.18
    $148.60
  • Securefix Gr8 UNC High Tensile Bolt 5/8 x 5 ½
    Securefix - Gr8 UNC High Tensile Bolt 5/8" x 5-1/2" | HTBOC58512
    Gr8 UNC High Tensile Bolt 5/8 X 5 ½ | HTBOC58512 The Gr8 UNC High Tensile Bolt 5/8 X 5 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $139.19
    $253.08
    $139.19
  • Securefix Gr8 UNC High Tensile Bolt 5/8 x 5
    Securefix - Gr8 UNC High Tensile Bolt 5/8" x 5" | HTBOC585
    Gr8 UNC High Tensile Bolt 5/8 X 5 | HTBOC585 The Gr8 UNC High Tensile Bolt 5/8 X 5 kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners, this kit...
    $129.79
    $235.98
    $129.79
  • Securefix Gr8 UNC High Tensile Bolt 5/8 x 4 ½
    Securefix - Gr8 UNC High Tensile Bolt 5/8" x 4-1/2" | HTBOC58412
    Gr8 UNC High Tensile Bolt 5/8 X 4 ½ | HTBOC58412 The Gr8 UNC High Tensile Bolt 5/8 X 4 ½ kit from Securefix is a comprehensive assortment designed to meet the rigorous demands of trade professionals. Providing a reliable supply of high-quality fasteners,...
    $120.38
    $218.88
    $120.38

Built for Strength Under Load & Jobsite Conditions

Not every fastening job needs precision threading. Most industrial environments demand strength, speed & reliability under pressure.

UNC hex bolts deliver that through deeper thread engagement that holds under load without stripping or loosening. Coarse thread bolts perform consistently in demanding conditions, especially where vibration or softer materials are involved.

Across Australian construction sites, workshops & maintenance operations, UNC bolts are used where fast installation & dependable holding power are essential. That combination keeps projects moving without compromising safety.

To complete fastening systems, trades run Hex Nut, Flat Washer & Spring Washer alongside UNC bolts for balanced load distribution. Orders are supported by Same day dispatch so work continues without delay, & Return & Refunds provide backup when needed.

Strong fastening keeps structures together. Weak fastening causes failure.

► Trade grade UNC bolts built for structural & industrial use
► Reliable supply trusted across construction & mechanical industries
► Bulk quantities available for site & workshop requirements
► Fast nationwide delivery across Australia to keep jobs moving

Secure Your Work with the Right Fastener

Loose or failed bolts lead to movement, damage & costly rework. Once a connection begins to fail, the entire system is at risk.

Securefix UNC bolts provide dependable fastening across structural, mechanical & industrial applications. Whether you’re building, repairing or maintaining, choosing the right coarse thread bolt ensures everything stays locked in place.

Stock the sizes you use & secure your work properly from the start.

Frequently Asked Questions

UNC bolts use a coarse thread profile that allows deeper engagement into material, improving grip & reducing stripping.

Yes. They are widely used in structural, mechanical & industrial environments where strength is required.

The deeper thread profile grips more material, reducing the chance of thread failure.

Yes. The wider thread pitch allows quicker engagement during installation.

Yes. UNC bolts Australia are commonly used across construction, fabrication & industrial applications.

Use UNC bolts where strength, durability & resistance to vibration are more important than precision adjustment.

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