The head of ordinary bolts is very thick and difficult to deform. If vibration occurs after installation, it needs to be re-tightened; the flange has a thin part, which can be slightly deformed and locked more firmly.

Quick Details

Finish:: Black oxide

Material:: Steel, grade4.8/8.8/10.9/12.9

Place of Origin:: Shanghai, China

Brand Name:: TOBO

Model Number:: DIN 34801

Standard:: DIN,JIS,ANSI,GB,BSW,etc

Color:: silvery white,as customer's require

Size:: M5-M30

Quality:: Top high quality

Head type:: Hex flange heade

Mark:: According to customer's requirement

Certificate:: SGS ROHS ISOISO9001:2008 ISO14001:2004

Packing:: Cartons+plastic Bags as customer's require

Sample:: Free

Screw Thread
d

PP	UNC
d_k	Ref.
k	max
k	min
h	max
h	min
d_c	max
d_c	min
B	max
Druve Size
d_s	max
d_s	min
b	L≤6
b	L＞6
r	max
r	min

20	18	16	14	13	12	11	10	9	8	7	7	6
0.287	0.362	0.431	0.499	0.571	0.645	0.715	0.86	1	1.138	1.28	1.42	1.562
0.255	0.323	0.394	0.472	0.515	0.551	0.63	0.787	0.866	1.063	1.181	1.299	1.417
0.245	0.313	0.384	0.462	0.505	0.541	0.62	0.777	0.856	1.053	1.171	1.289	1.407
0.07	0.1	0.125	0.155	0.16	0.165	0.2	0.255	0.27	0.355	0.382	0.422	0.453
0.06	0.09	0.115	0.145	0.15	0.153	0.188	0.243	0.26	0.343	0.37	0.41	0.441
0.375	0.469	0.562	0.656	0.75	0.844	0.938	1.125	1.312	1.5	1.688	1.875	2.062
0.365	0.457	0.55	0.642	0.735	0.828	0.921	1.107	1.293	1.479	1.665	1.852	2.038
0.2073	0.2663	0.3103	0.3613	0.4113	0.4663	0.5183	0.6183	0.7193	0.8393	0.9433	1.0463	1.1513
E8	E10	E12	E14	E16	E18	E20	E24	E28	E32	E36	E40	E44
0.25	0.3125	0.375	0.4375	0.5	0.5625	0.625	0.75	0.875	1	1.125	1.25	1.375
0.245	0.3065	0.369	0.4305	0.493	0.5545	0.617	0.741	0.866	0.99	1.114	1.239	1.363
0.75	0.875	1	1.125	1.25	1.375	1.5	1.75	2	2.25	2.5	2.75	3
1	1.125	1.25	1.375	1.5	1.625	1.75	2	2.25	2.5	2.75	3	3.25
0.025	0.025	0.025	0.025	0.025	0.45	0.45	0.45	0.065	0.095	0.095	0.095	0.095
0.015	0.015	0.015	0.015	0.015	0.02	0.02	0.02	0.04	0.06	0.06	0.06	0.06

Packing & Shipping

Application:

Sifang mother, hardware equipment, fastening accessories. It has a square shape with internal threads and can be used with bolts. Also known as a square nut, Mostly used in construction, building materials, home improvement, industrial and mining, transportation, power and other industries. Sifang mother is a nut type hardware product, with small size, different specifications and large demand.

Package details:

1) Sample order, 20/25kg per carton with our logo or neutral package;

2) For Large orders, we can custom packaging;

3) Normal Packing: 1000/500/250pcs per small box. then into cartons and pallet;

4) According to customers' requirements.

FAQ

1.How do you let me trust you?
We are a Golden supplier in Alibaba who do business for more than 5 years. You can make an order by Alibaba to us directly.

2.How about your price?
High-quality products with a reasonable price suitable for your market.

3.How do you control your quality?
We request a QC inspection for each batch of goods. And we can provide you inspection report and mill certificate if you want..

4.Could you provide free samples?
For new customers, We can provide free samples for standard fasteners. But the clients will pay the express charges. For regular customers, We will send you free samples and pay express charges by ourselves.

5.How about your delivery time?
Generally speaking, All the goods have stock with little quantity, we can delivery them with one week. If the quantity is 1-2container, we can give you with 30-45days.

6.What is your packing?
Our packing is 20-25kg for one carton,36 or 48pcs cartons for one pallet. One pallet is about 900-960kg, We also can make the customer's logo on the cartons. Or we customized cartons according to customers' requirement, If you need small box packing, we can do according to your requirement.

7.What is your payment term?
We can accept T/T,LC for general order. For new customer, we request 20%-50% T/T in advance, and balance payment should against B/L copy. For regular customer, we can provide delay payment after B/L date about 30-90 days