Square Head Nut

China leading manufacturer Xiaoguo® supplies good quality Square Head Nut fastens stably and is easy to position with tools. It works well for machinery assembly and construction fixtures.Precise thread making ensures a tight fit with bolts, and chosen materials improve resistance to wear and deformation during long-term use.We carry out strict checks before shipment to make sure the products are reliable.Our Square Head Nut has a 2-year warranty for industrial projects.It works well in both light assembly and heavy-duty fixing jobs.

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Product Description

Actual product usage cases

(1)Construction work

Square Head Nut works well in construction and on-site maintenance too.It’s mainly used for fixing metal brackets, scaffolding parts and temporary structures.Workers can grip it easily with standard tools in narrow or hard-to-reach spaces, so on-site repairs and installations are quicker.

(2)Outdoor Engineering

It’s also widely used in outdoor engineering fixtures. It holds up well under normal outdoor conditions and doesn’t come loose easily.

(3)Basic mechanical assembly

This fastener is widely used in basic machinery assembly, especially for small to medium-sized factory equipment and fixed frames. It’s a common choice for conveyor belts, small motor bases and transmission parts. Its flat square shape stays steady when tightened and doesn’t slip easily in daily use or light vibration.Many regular production lines use it for long-term fixed connections, and you don’t need complicated steps to install it.

(4)Furniture manufacturing

Besides industrial and construction uses, it’s also widely used in furniture making and auto repair.For heavy wooden or metal furniture frames, it holds tight and keeps the structure stable.

(5)Car repair

In auto repair shops, it’s used to fix small parts and chassis accessories, and fits standard bolts well.These are all everyday practical uses, focusing on reliable basic fastening instead of special high-end applications.

Square Head Nut

Mon	M5	M6	M8	M10	M12	M14	M16	M18	M20	M22	M24
P	0.8	0.75	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3
k max	4	5	6.5	8	10	11	13	15	16	18	19
k min	3.7	4.7	6.14	7.64	9.64	10.57	12.57	14.57	15.57	17.57	18.48
s max	8	10	13	17	19	22	24	27	30	32	36
s min	7.8	9.8	12.75	16.75	18.65	21.65	23.65	26.65	29.65	31.6	35.6
e min	11.3	14.1	18.4	24	26.9	31.1	33.9	38.2	42.4	45.3	50.9

Q&A session

What is the minimum order quantity for your Square Head Nut? Do you accept small batch trial orders?

A: Our usual MOQ for regular stock sizes is 5000 pieces per spec.We take small trial orders from new customers with a flexible lower limit, so you can test how the product fits and holds up before ordering in bulk.Trial orders follow the same strict quality control as bulk orders, and we process them quickly so you won’t wait long.

Square Head Nut

Product Technical Specifications

(1) Low-carbon steel

Square Head Nut is made of standard low carbon steel, a common material for general fastening. Zinc plating is optional for basic rust and corrosion resistance, good for indoor and mild outdoor environments.

(2)Hardness

Material hardness meets regular industrial requirements. It holds steady under normal clamping force and does not deform easily during installation or daily use. We don’t use materials that are too hard or too soft, which can cause cracking or loose fitting.

(3)Dimension tolerance range

We provide regular industrial sizes for this product, covering common thread standards used in most assembly work, including UNC and UNF threads for universal fit with matching bolts. Sizes range from 1/4 inch to 3/4 inch, covering the most common sizes for daily industrial work.Each size follows fixed tolerance rules for thread pitch and outer square width, so there are no unexpected size changes that mess up assembly fit.

(4)Physical specifications

Basic physical specs include fixed square head size and total thickness, matching standard industry sizes for consistency.All products get simple pre-shipment checks on thread smoothness and size accuracy, so they work with standard bolts without jamming.These specs are for daily practical use, not highly specialized high-performance jobs, so they fit bulk and regular orders.