As a global supplier of customized fastening solutions, AYA's senvice process is also as close to customers as AYA's products. From describing needs to follow-up services, AYA will promptly and spare no effort to help customers solve any fastening problems that arise, to eliminate the concern of customers.

Product Description

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Standard	ASME B 18.2.1
Thread Type	UNC Thread / Full Thread
Commodity	Square Head Machine Bolts
Also Named	Square Head Bolt
Material	Steel
Property Class	GR 2, 5, 8
Diameter	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
Finish	Plain/ Black/ Zinc Plated/ Hot Dipped Galvanized/ Organic/ Dacromet/ Phosphating/ Cadmium Electroplate/ Nickel Plate
Head Type	Square Head
Drive Type	External Square
Alternative Standard	DIN 21346
MOQ	1000kgs
Lead Time	30 to 60 days

Dimensions Table

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Screw Thread		1/4	1/3	3/8	4/9	1/2	5/8	3/4	7/8	1	1-1/8	1-1/4	1-3/8	1-1/2
d
d		0.2500	0.3125	0.3750	0.4375	0.5000	0.6250	0.7500	0.8750	1.0000	1.1250	1.2500	1.3750	1.5000
PP	UNC	20	18	16	14	13	11	10	9	8	7	7	6	6
ds	max	0.260	0.324	0.388	0.452	0.515	0.642	0.768	0.895	1.022	1.149	1.277	1.404	1.531
	min	0.237	0.298	0.360	0.421	0.482	0.605	0.729	0.852	0.976	1.098	1.223	1.345	1.470
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	0.500	0.562	0.625	0.750	0.938	1.125	1.312	1.500	1.688	1.875	2.062	2.250
	min	0.362	0.484	0.544	0.603	0.725	0.906	1.088	1.269	1.450	1.631	1.812	1.994	2.175
e	max	0.530	0.707	0.795	0.884	1.061	1.326	1.591	1.856	2.121	2.386	2.652	2.917	3.182
	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	0.220	0.268	0.316	0.348	0.444	0.524	0.620	0.684	0.780	0.876	0.940	1.036
	min	0.156	0.186	0.232	0.278	0.308	0.400	0.476	0.568	0.628	0.720	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
	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	0.750	0.875	1.000	1.125	1.250	1.500	1.750	2.000	2.250	2.500	2.750	3.000	3.250
	L＞6	1.000	1.125	1.250	1.375	1.500	1.750	2.000	2.250	2.500	2.750	3.000	3.250	3.500

Product Details

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Product Advantages

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Advantages Of Square Head Machine Bolts

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1. Square head bolts, or square head machine bolts offer a large bearing area for positive gripping.

2. Primarily used nowadays for aesthetic projects that create a rustic look or to match existing fasteners.

3. The square head machine bolts comes in both fully threaded and partially threaded pitches.

4. Square head bolts are sometimes selected over hex heads because the head will fit neatly in a channel.

5. AYA provide any styles, materials and finishes in our square bolts section, while any sizes can be found in AYA site.

Quality Inspection

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Professional QC inspectors are assigned to supervise the manufacturing and inspection process to ensure the transparency and high standards of the production and the standardization and precision of the final products.

Packaging & Container Loading

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Our scale and presence create cost efficiencies in intercontinental shipping as well as local custom clearing, warehousing and road transportation services. We take care of the last-mile logistics, and could issue the invoice based on DDP term and provide 3PL (third party logistics) services.

Usage Scenarios

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Why Choose AYA?

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AYA provides exclusive services to 1000+ members from all over the world every year, with a unique chain service solution system, you only need to click the mouse to get exclusive fastening solution and enjoy door-to-door services.

http://www.ayafasteners.com/