Stainless Steel Square Head Bolts

Overview:

Commodity: Stainless Steel Square Head Bolts
Material: Made from 304 stainless steel, these screws have good chemical resistance and may be mildly magnetic. They are also known as A2 stainless steel.
Head Type: Square head.
Length: is measured from under the head.
Thread Type: Coarse Thread, Fine Thread.Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Appliation: About half the strength of medium-strength screws, these screws can be used for light duty fastening applications, such as securing access panels. Large flat sides make them easy to grip with a wrench and keep them from rotating in square holes.
Standard: Screws that meet ASME B1.1, ASME B18.2.1, comply with standards for dimensions.

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Specifications

Dimension Table

Why AYA

Product Description

Product Name	Stainless Square Head Bolts
Material	Made from 304 stainless steel, these screws have good chemical resistance and may be mildly magnetic. They are also known as A2 stainless steel
Head Type	Square head
Length	Is measured from under the head
Thread Type	Coarse Thread, Fine Thread. Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Application	About half the strength of medium-strength screws, these screws can be used for light duty fastening applications, such as securing access panels. Large flat sides make them easy to grip with a wrench and keep them from rotating in square holes.
Standard	Screws that meet ASME B1.1, ASME B18.2.1, comply with standards for dimensions.

Advantages of Stainless Square Head Bolts

1. Stainless bolts have good chemical resistance and may be mildly magnetic.
2. Coarse threads are the industry standard.
3. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
4. The size of the square head bolt is large, which is convenient for the wrench to get stuck, or rely on other parts to stop the rotation; it can also be used in parts with T-slots to adjust the position of the bolt. Grade C lag bolts are often used on rougher structures.
5. The square head bolt is the same as the hexagon bolt, but the square head size of this bolt is larger and the force surface is also larger. It is often used on rough structures, and it can also be used in parts with T-shaped slots to adjust the bolt position.

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AYA Stainless Square Head Bolts dimensions table

ASME B18.2.1

Screw Thread		1/4	5/16	3/8	7/16	1/2	5/8	3/4	7/8	1	1-1/8	1-1/4	1-3/8	1-1/2
d		1/4	5/16	3/8	7/16	1/2	5/8	3/4	7/8	1	1-1/8	1-1/4	1-3/8	1-1/2
d		0.25	0.3125	0.375	0.4375	0.5	0.625	0.75	0.875	1	1.125	1.25	1.375	1.5
PP	UNC	20	18	16	14	13	11	10	9	8	7	7	6	6
ds	max	0.26	0.324	0.388	0.452	0.515	0.642	0.768	0.895	1.022	1.149	1.277	1.404	1.531
ds	min	0.237	0.298	0.36	0.421	0.482	0.605	0.729	0.852	0.976	1.098	1.223	1.345	1.47
s	Nominal Size	3/8	1/2	9/16	5/8	3/4	15/16	1-1/8	1-5/16	1-1/2	1-11/16	1-7/8	2-1/16	2-1/4
	max	0.375	0.5	0.562	0.625	0.75	0.938	1.125	1.312	1.5	1.688	1.875	2.062	2.25
	min	0.362	0.484	0.544	0.603	0.725	0.906	1.088	1.269	1.45	1.631	1.812	1.994	2.175
e	max	0.53	0.707	0.795	0.884	1.061	1.326	1.591	1.856	2.121	2.386	2.652	2.917	3.182
e	min	0.498	0.665	0.747	0.828	0.995	1.244	1.494	1.742	1.991	2.239	2.489	2.738	2.986
k	Nominal Size	11/64	13/64	1/4	19/64	21/64	27/64	1/2	19/32	21/32	3/4	27/32	29/32	1
	max	0.188	0.22	0.268	0.316	0.348	0.444	0.524	0.62	0.684	0.78	0.876	0.94	1.036
	min	0.156	0.186	0.232	0.278	0.308	0.4	0.476	0.568	0.628	0.72	0.812	0.872	0.964
r	max	0.03	0.03	0.03	0.03	0.03	0.06	0.06	0.06	0.09	0.09	0.09	0.09	0.09
r	min	0.01	0.01	0.01	0.01	0.01	0.02	0.02	0.02	0.03	0.03	0.03	0.03	0.03
b	L≤6	0.75	0.875	1	1.125	1.25	1.5	1.75	2	2.25	2.5	2.75	3	3.25
b	L＞6	1	1.125	1.25	1.375	1.5	1.75	2	2.25	2.5	2.75	3	3.25	3.5