Tag Archives: Family Business

Understanding machine screw sizes is essential for anyone working with precision fasteners, whether in manufacturing, engineering, maintenance or repair. Even small differences in diameter can affect fit, performance and safety. Therefore, having a clear reference for fractional‑inch, decimal and millimetre equivalents is incredibly useful.

At Hague Fasteners, we regularly support customers who work across both imperial and metric systems. As a result, we’ve created a simple and accurate reference chart to help you convert fractional‑inch measurements into decimal and millimetre values with confidence

Why Machine Screw Size Conversions Matter

Machine screws are produced in a wide range of diameters, and many industries still rely on fractional‑inch sizing. However, drawings, OEM specifications and international standards often mix imperial and metric units. This means engineers frequently need quick, reliable conversions to avoid errors.

Accurate sizing helps with selecting the correct drill size, ensuring thread compatibility, avoiding tolerance issues, maintaining safety and performance, and reducing rework or material waste.

Machine Screw Size Conversion Chart

This chart provides a clear comparison and is designed to make fastener selection easier, especially when working across mixed measurement systems. For specific guidance on your application, please contact sales@haguefasteners.co.uk

Machine Screw Sizes

Size Number	000	00	0	1	2	3	4	5	6	8	10	12
Diameter	.034	.047	.060	.073	.086	.099	.112	.125	.138	.164	.190	.216
Hole Diameter	.040	.053	.066	.080	.094	.107	.120	.133	.146	.173	.198	.224

Decimal and Millimeter Equivalents of Fractional Parts of an Inch

Fraction	Decimal	Millimeter	Fraction	Decimal	Millimeter	Fraction	Decimal	Millimeter
1	1.0000	25.4000	21/32	0.6562	16.6687	5/16	0.3125	7.9375
63/64	0.984	25.0031	41/64	0.6406	16.2719	19/64	0.2969	7.5406
31/32	0.9688	24.6062	5/8	0.6250	15.8750	9/32	0.2812	7.1437
61/64	0.9531	24.2094	39/64	0.6094	15.4781	17/64	0.2656	6.7469
15/16	0.9375	23.8125	19/32	0.5938	15.0813	1/4	0.2500	6.3500
59/64	0.9219	23.4156	37/64	0.5781	14.6844	15/64	0.2344	5.9531
29/32	0.9062	23.0187	9/16	0.5625	14.2875	7/32	0.2188	5.5563
57/64	0.8906	22.6219	35/64	0.5469	13.8906	13/64	0.2031	5.1594
7/8	0.8750	22.2250	17/32	0.5312	13.4937	3/16	0.1875	4.7625
55/64	0.8594	21.8281	33/64	0.5156	13.0969	11/64	0.1719	4.3656
27/32	0.8438	21.4312	1/2	0.5000	12.7000	5/32	0.1562	3.9688
53/64	0.8281	21.0344	31/64	0.4844	12.3031	9/64	0.1406	3.5719
13/16	0.8125	20.6375	15/32	0.4688	11.9062	1/8	0.1250	3.1750
51/64	0.7969	20.2406	29/64	0.4531	11.5094	7/64	0.1094	2.7781
25/32	0.7812	19.8438	7/16	0.4375	11.1125	3/32	0.0938	2.3812
49/64	0.7656	19.4469	27/64	0.4220	10.7188	5/64	0.0781	1.9844
3/4	0.7500	19.0500	13/32	0.4062	10.3187	1/16	0.0625	1.5875
47/64	0.7344	18.6531	25/64	0.3906	9.9219	3/64	0.0469	1.1906
23/32	0.7188	18.2563	3/8	0.3750	9.5250	1/32	0.0312	0.7937
45/64	0.7031	17.8594	23/64	0.3594	9.1281	1/64	0.0156	0.3969
11/16	0.6875	17.4625	11/32	0.3438	8.7312	—	—	—
43/64	0.6719	17.0656	21/64	0.3281	8.3344	—	—	—

Supporting Precision Engineering

Whether you’re working on prototypes, small‑batch production or specialist fasteners to drawing, accurate sizing is essential. Hague Fasteners manufacture custom screws, bolts and non‑standard fasteners in both imperial and metric dimensions, ensuring full compliance with your specifications. Moreover, our team is always available to support you with sizing, conversions or bespoke fastener manufacturing.

If you need guidance or require custom fasteners, we’re here to help.

Bespoke Fasteners, Birmingham Business Post, British Fasteners, British Manufacturing, British Stainless Steel Association, Custom Fasteners, custom Made bolts

Hague Fasteners: The UK Leader in Special Fasteners, Precision Bolting and Made to Drawing Components

Molly Timmins

Hague Fasteners sets the benchmark for UK‑manufactured special fasteners by delivering precision engineering, full material traceability and ISO‑certified quality for safety‑critical industries where failure is not an option. Moreover, the company actively shapes the standards of high‑integrity fastener production across the UK.

For more than 50 years, Hague Fasteners has led the UK’s specialist bolt and nut manufacturing sector. The team has built its reputation on dependable delivery, meticulous engineering and a commitment to quality that goes far beyond standard fastener production. As a result, the business continues to redefine what high‑integrity fastener manufacturing should be: controlled, traceable and engineered with absolute accountability.

Why Hague Fasteners Leads the UK Special Fastener Market

What sets Hague Fasteners apart is not just experience, but the way the company manufactures. Furthermore, every process is intentionally designed for environments where failure is unacceptable — including nuclear, defence, oil & gas, heavy engineering and power generation. As a result, safety, compliance and performance are non‑negotiable at every stage.

Quality Engineered Into Every Stage of Production

Hague Fasteners’ manufacturing workflow is driven by strict, quality‑led principles that ensure consistency, reliability and full accountability.

Full Material Traceability

Every component is traceable from raw material receipt through to final inspection, ensuring complete transparency and compliance throughout the manufacturing process.

Dimensional Accuracy at Every Step

Precision machining and in‑process checks ensure each part meets the exact requirements of the customer’s drawing – no deviations and no assumptions.

Rigorous Inspection

First Article Inspection
Detailed dimensional checks
Verification against technical specifications

No component leaves the Wolverhampton facility without meeting the highest standards of integrity and performance.

Certified, Documented and Trusted Manufacturing

Hague Fasteners operates under ISO 9001 certified systems, ensuring consistency, repeatability and continuous improvement across every order. Furthermore, all certification and documentation align with contractual and regulatory requirements, giving customers complete confidence in the integrity of every fastener.

The company’s commitment to responsible, compliant manufacturing is reinforced through its alignment with respected UK standards bodies, including:

British Standards Institution (BSI)
Made in Britain
British Stainless Steel Association (BSSA)

Supporting the World’s Most Demanding Industries

The industries that rely on Hague Fasteners operate in some of the harshest and most safety‑critical environments. As a result, the company provides a combination of expertise, responsiveness and technical clarity to support both planned projects and urgent breakdown situations. In addition, this ensures customers benefit from consistent quality, reduced risk and dependable supply at every stage.

Bespoke and non‑standard fasteners manufactured in the UK
Made to drawing bolts, nuts, studs and precision components
Engineering support for urgent, complex and long‑term requirements
Reliable global supply backed by responsive Wolverhampton‑based production

Raising the Standard for Special Fasteners

In a market where precision, traceability and trust matter, Hague Fasteners continues to raise expectations. Moreover, the company champions a manufacturing model that is not mass produced or catalogue driven, but engineered with care, control and accountability. As a result, customers benefit from consistently high‑integrity components.

For organisations requiring high integrity, made to drawing fasteners, Hague Fasteners remains a proven and trusted partner.

Discuss Your Special Fastener Requirements

To request a quote or discuss a bespoke bolting requirement, contact:

sales@haguefasteners.co.uk

Connect With Hague Fasteners

Archive News

Celebrating New Beginnings: Welcoming Baby Hugo to the Hague Family Legacy

Jon Hague

We’re delighted to share some joyful news with our clients and partners: Director Jack Hague and his partner Justine have welcomed their first child, Hugo Jonathan, into the world. This heartwarming addition marks the fourth generation of the Hague family, continuing a proud tradition that began in 1971.

A Family Legacy Spanning Generations

Hague Fasteners was founded over 50 years ago by Jack Hague’s grandfather and the baby’s great-grandfather, Jack Hague Sr. Starting as a small, family-owned business in Wolverhampton, the company has grown to become a trusted name in bespoke fastener manufacturing. Today, under the leadership of CEO Jon Hague, the business remains firmly rooted in its values of precision, integrity, and innovation—values that continue to be passed down through the generations.

This milestone is a beautiful reminder of our commitment to the family ethos that has driven our success for more than five decades. It’s a moment of pride for the entire Hague team and a symbol of continuity for our cherished clients.

A Warm Welcome to Baby Hugo Jonathan

As we celebrate this wonderful occasion, we’d like to extend a heartfelt thank you to everyone who has supported Hague Fasteners over the years. Our team remains inspired by the trust and loyalty of our clients, which allows us to pass on a thriving legacy to the next generation.

Hugo Jonathan represents not just a new beginning for the Hague family, but also a reaffirmation of our promise to deliver unparalleled quality and service for generations to come.

Commitment to Our Clients and Future

As we look forward to the future, this moment is a perfect opportunity to reflect on our heritage and the strong partnerships we’ve built. Hague Fasteners remains dedicated to serving your bespoke fastener needs with the same passion and attention to detail that have defined our business since its founding in 1971.

We invite you to get in touch with us for any upcoming projects or enquiries. Together, we’ll continue building success stories for the years ahead.

Hague Fasteners Limited