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ASTM A307A M6 20mm Hex Bolt Carbon Steel Material

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Jiaxing City Qunbang Hardware Co., Ltd

City: jiaxing

Province/State:zhejiang

Country/Region:china

Tel:86-573-82071082

Contact Person:
Mr.Lance View Contact Details

ASTM A307A M6 20mm Hex Bolt Carbon Steel Material

Brand Name	QBH
Model Number	ANSI A307
Certification	ISO9001
Place of Origin	CHINA
Minimum Order Quantity	900kg
Price	Negotiation
Payment Terms	L/C, T/T,OA
Supply Ability	500TON/MONTH
Delivery Time	30days
Packaging Details	25kg Carton+900kg/Pallet
Material	Carbon steel
Size	1/4~1-1/2
Surface treatment	Plain,Zinc,Black,H.D.G
Grade	2/5/8/10
Process	Cold Forging,Hot Forging
Sample	Free Sample
Packaging	25kg Carton+900kg/Pallet

Detailed Product Description

Hex bolts (six sided heads) are the industry standard for fasteners with forged heads. ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head. For specifications such as A307 grade B, A325 and A490 that require a heavy hex pattern, refer to dimensional tolerances for heavy hex bolts or structural bolts.

Manufacturing

QBH Bolt manufactures hex bolts from 1/4″ diameter through 3″ diameter in most ASTM, AASHTO, and SAE specifications. Special tooling can be created to produce nonstandard head dimensions or bolt heads with your company’s name and/or logo.

High-Strength Grade 8 Steel Hex Head Screws

Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. Grade 8 steel hex head screws are marked with six radial lines. Length is measured from under the head.

Zinc yellow-chromate plated steel screws resist corrosion in wet environments. Zinc-aluminum-coated steel screws are about five times as corrosion resistant as zinc yellow-chromate plated screws and have good resistance to salt water and acids. Also known as ultra coat and armor coat. To maintain corrosion resistance, use these screws with zinc-aluminum-coated nuts and washers.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the threads per inch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.

Screws that meet ASTM A354BD or SAE J429 comply with specifications and testing requirements for material quality. Screws that meet ASME B18.2.1 or ASME B18.6.3 comply with specifications for dimensional standards.

Product name	HEX BOLTS
Standard	ASTM A307A
Size	3/8"-2"
Class	Gr.A
Finish	Z.P., B.Z.P.,PLAIN, BLACK, H.D.G., dacromet, geomet, nickle plated, mechanical zinc plated,ect.
Packing	bulk/boxes in cartons, bulk in poly bags/-buckets, etc
Pallet	solid wood pallet, plywood pallet, ton box/bag, etc.
Mechanical Properties:	GB/T 3098.1

Max body length : 800mm/32in

Screw Thread
d

PP	UNC
	UNF
	8-UN
d_s	max
	min
s	max
	min
e	max
	min
k	max
	min
r	max
	min
b	L≤6
	L＞6

20	18	16	14	13	11	10	9	8	7	7	6
28	24	24	20	20	18	16	14	12	12	12	12
-	-	-	-	-	-	-	-	-	8	8	8
0.26	0.324	0.388	0.452	0.515	0.642	0.768	0.895	1.022	1.149	1.277	1.404
0.237	0.298	0.36	0.421	0.482	0.605	0.729	0.852	0.976	1.098	1.223	1.345
0.438	0.5	0.562	0.625	0.75	0.938	1.125	1.312	1.5	1.688	1.875	2.062
0.425	0.484	0.544	0.603	0.725	0.906	1.088	1.269	1.45	1.631	1.812	1.994
0.505	0.577	0.650	0.722	0.866	1.083	1.299	1.516	1.732	1.949	2.165	2.382
0.484	0.552	0.620	0.687	0.826	1.033	1.240	1.447	1.653	1.859	2.066	2.273
0.188	0.235	0.268	0.316	0.364	0.444	0.524	0.604	0.7	0.78	0.876	0.94
0.15	0.195	0.226	0.272	0.302	0.378	0.455	0.531	0.591	0.658	0.749	0.81
0.030	0.030	0.030	0.030	0.030	0.060	0.060	0.060	0.090	0.090	0.090	0.090
0.010	0.010	0.010	0.010	0.010	0.020	0.020	0.020	0.030	0.030	0.030	0.030
0.7500	0.8750	1.0000	1.1250	1.2500	1.5000	1.7500	2.0000	2.2500	2.5000	2.7500	3.0000
1.0000	1.1250	1.2500	1.3750	1.5000	1.7500	2.0000	2.2500	2.5000	2.7500	3.0000	3.2500

Screw Thread
d

PP	UNC
	UNF
	8-UN
d_s	max
	min
s	max
	min
e	max
	min
k	max
	min
r	max
	min
b	L≤6
	L＞6

6	-	5	-	4-1/2	4	4	4	4	4	4	4
12	-	-	-	-	-	-	-	-	-	-	-
8	8	8	8	8	8	8	8	8	8	8	8
1.531	1.658	1.785	1.912	2.039	2.559	2.827	3.081	3.335	3.589	3.858	4.111
1.47	1.591	1.716	1.839	1.964	2.461	2.711	2.961	3.21	3.461	3.726	3.975
2.25	2.438	2.625	2.812	3	3.75	4.125	4.5	4.875	5.25	5.625	6
2.175	2.356	2.538	2.719	2.9	3.625	3.988	4.35	4.712	5.075	5.437	5.8
2.598	2.815	3.031	3.248	3.464	4.330	4.763	5.196	5.629	6.062	6.495	6.928
2.480	2.616	2.893	3.099	3.306	4.133	4.546	4.959	5.372	5.786	6.198	6.612
1.036	1.116	1.196	1.276	1.388	1.708	1.869	2.06	2.251	2.38	2.572	2.764
0.902	0.978	1.054	1.13	1.175	1.479	1.632	1.815	1.936	2.057	2.241	2.424
0.090	0.090	0.120	0.120	0.120	0.190	0.190	0.190	0.190	0.190	0.190	0.190
0.030	0.030	0.040	0.040	0.040	0.060	0.060	0.060	0.060	0.060	0.060	0.060
3.2500	3.5000	3.7500	4.0000	4.2500	5.2500	5.7500	6.2500	6.7500	7.2500	7.7500	8.2500
3.5000	3.7500	4.0000	4.2500	4.5000	5.5000	6.0000	6.5000	7.0000	7.5000	8.0000	8.5000

Mechanical property :SAEJ429

Process flow

Cold forging

Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ thread rolling ➨make heat treatment(if need) ➨ Finish ➨ Packing

Hot forging

Cutting material ➨ hot forging ➨ turning ➨ shrink diameter(half thread) ➨thread rolling ➨ make heat treatment(if need) ➨ Finish ➨ Packing

Product Grade

Grade2 Grade5 Grade8

Materials and Chemical compstition

1008

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Al
0.06	0.06	0.33	0.013	0.003	0.01	0	0.01	0.028

1035

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.34	0.13	0.73	0.012	0.002	0.02	0.01	0.02

10B21

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	B
0.2	0.04	0.81	0.017	0.007	0.017	0.0021

1045

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.45	0.23	0.58	0.014	0.006	0.057	0.008	0.016

40CR

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.4	0.21	0.54	0.015	0.008	0.95	0.02	0.02

35CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.35	0.22	0.59	0.01	0.003	0.93	0.01	0.01	0.21

42CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.42	0.27	0.92	0.013	0.004	1.01	0.03	0.04	0.2

Our Services

Professional Manufacturer: All of our Fastener are designed and manufactured according to buyers'
specification and performance.
Quality is guaranteed: Durability testing and critical technical design to enhance fasteners lifetime.
Cost effective: Competitive prices with professional factory supply
Perfect fastening solution with 15+ years experiences to solve your problem: Wide range of parts selection.
Customized Ideal Fasteners: customized services according to the samples and drawings offered.

Free Samples for Standard Fastener from Jiaxing City Qunbang Hardware
We Promise:
1.High quality
2. Competitive price
3. The shortest delivery
4. The fastest response
5. The best service

FAQ

1. How do you let me trust you.

Jiaxing City Qunbang Hardware Co.,ltd hs its own right of import and export,QBH trademark in China,United States,European Union have been registered.At the same time,you can also check the registration information of our company in the China industry and Commerce system.

2. How about your price.

We will be based on different markets,for different quality and quantity,tailor-made prices for customers,in order to achieve win-win goal.

3. How do you control your quality.

Incoming quality contral( IQC)→Process Quality control(PQC)→Output quality control(OQC),and the random samples is sent to TUV for testing.If the customer received the goods and found quality problems,QBH company promises to be responsible for returning money or replenishing the goods

4. Could you provide free samples?

For new customer, We can provide free samples for standard fastener, But the clients will pay the express

charges. For old customer, We will send you free samples and pay express charges by ourself.

5. Do you accept small order?

QBH company can accept small orders if we have them in stock.Generally speaking,the stock probability of stainless steel fasteners is higher than that of carbon steel fasteners.

6. How about your delivery time

What we pursure is the high efficiency movement pattern,the stainless steel fastener delivery time about 15days,the carbon steel fastener will it about 30days

7. What is your packing.

Usually 25KG/carbon,36CTNS on the pallets,or 20-30kg/Bags,then on the pallet,QBH company personalized packagingis also available,like 10PCS/plastic bag or 10pcs/box,it can print some information

such as LOGO and pattern of customers.

8. What is your payment term

Normally,our terms of payment are TT and L/C,if we cooperate for a long time,we can reach the point of mutual trust,and fully support our customers to become bigger and stronger in the local market.

Not only in the price concessions,but also in the payment can also be made on credit,Specific credit sales time needs to be negotiated separately.

Product Tags: m6 20mm hex bolt ASTM A307A m6 20mm hex bolt Carbon steel m6 20mm hex bolt

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