GB /T 819 Countersunk Flat Head Screws With Cross Recess

GB /T 819 Countersunk Flat Head Screws With Cross Recess Custom Wholesale

Overview

 

Also known as a flat-heat screw, a countersunk screw is a type of screw that's designed to rest flush with the object or surface in which it's inserted. They are called “countersunk screws” because they “sink” into objects and surfaces. They feature a flat head that tapers along the shaft.

 

 

 

 

Product Description

Finish:	zinc plating/galvanized, phosphate, black oxide, plain, Geomet,Dacroment, hot dip galvanized, passivated
Measurement system:	Metric, Imperial (Inch)
Place of Origin:	Dongguan, China
Sizes	M1.6, M2, M2.5, M3, M3.5, M4, M5, M6, M8, M10
Standard:	ISO, GB, BS, DIN, ANSI, JIS, Non-standard
Product name:	GB /T 819.1 Countersunk Flat Head Screws With Cross Recess
Grade:	4.8/ 6.8/ 8.8/ 10.9/ 12.9,A2-70, A4-70, A4-80
Type:	Hardware Tools
Packing:	carton/pallet
Material:	Carbon Steel, stainless steel, alloy steel
Thread	Coarse, fine
Used	Building Industry Machinery, auto, tower, mining etc

Screw Thread/d					M1.6	M2	M2.5	M3	(M3.5)	M4	M5	M6	M8	M10
P		Pitch			0.35	0.4	0.45	0.5	0.6	0.7	0.8	1	1.25	1.5
a		max			0.7	0.8	0.9	1	1.2	1.4	1.6	2	2.5	3
b		min			25	25	25	25	38	38	38	38	38	38
dk		theor.	max		3.6	4.4	5.5	6.3	8.2	9.4	10.4	12.6	17.3	20
		Actual	max=nominal size		3	3.8	4.7	5.5	7.3	8.4	9.3	11.3	15.8	18.3
			min		2.7	3.5	4.4	5.2	6.94	8.04	8.94	10.87	15.37	17.78
k		max=nominal size			1	1.2	1.5	1.65	2.35	2.7	2.7	3.3	4.65	5
r		max			0.4	0.5	0.6	0.8	0.9	1	1.3	1.5	2	2.5
x		max			0.9	1	1.1	1.25	1.5	1.75	2	2.5	3.2	3.8
Socket No.					0	0	1	1	2	2	2	3	4	4
M1		Ref.			1.6	1.9	2.9	3.2	4.4	4.6	5.2	6.8	8.9	10
M2		Ref.			1.6	1.9	2.8	3	4.1	4.4	4.9	6.6	8.8	9.8
Penetration depth		Type H	max		0.9	1.2	1.8	2.1	2.4	2.6	3.2	3.5	4.6	5.7
			min		0.6	0.9	1.4	1.7	1.9	2.1	2.7	3	4	5.1
		Type Z	max		0.95	1.2	1.73	2.01	2.2	2.51	3.05	3.45	4.6	5.64
			min		0.7	0.95	1.48	1.76	1.75	2.06	2.6	3	4.15	5.19
Weight of per 1000 steel products(≈kg)					-	-	-	-	-	-	-	-	-	-
①,The diameter of the unthreaded portion is approximately equal to the diameter of the pitch or allowed to equal the major diameter of the thread.

 

 

Factory show

 

? Our company covers an area of 10,000 square meters with about 120 staff at present. 

 

?  Equipment with 60 units of multi-stage cold forging machines and 3 sets of continuous carburizing quenching furnaces and full sets of inspection equipment.

 

?  Based firmly on ISO9001 quality system standards, the company operates each link from raw materials procession to the production process in strict accordance with the procedures and boasts well-qualified quality inspectors and perfect testing equipment
 
?  Which takes effective control on the production process to ensure product quality, It successfully won, the ISO9001-2000 quality system certificate in 2003.

 

 

 

Applications

lifting eye nuts are often used in conjunction with external threaded columns to lift various equipment, such as molds, chassis, motors, etc.

 

⚒ furniture industry
⚒ building industry
⚒ toy industry
⚒ plastic case industry
⚒ auto industry
⚒ military industry
⚒ medical instruments industry
⚒ aerospace industry
⚒ shipbuilding industry
⚒ energy equipment industry
⚒ electronic industry
⚒ furniture industry
⚒ materials industry

 

Our  Advantage

 

? Specializing in the production of various series of high tensile/strength fasteners for 18 years.

With DIN, ANSI/ASME, ISO, GB, JIS standards as well as custom fasteners. 

? With senior and professional engineers with more than 10 years of experience

?  Stock for Standar Product Line, will ship immediately

?  7/24 hours service, one-stop fasteners solutions

 

 

 

Packing & Delivery

 

To better ensure the safety of your goods, professional, environmentally friendly, convenient, and efficient packaging services will be provided. 

Packing details:

1) 1 bag+ 1 carton+pallet or 1 box+ 1 carton+pallet (It depends on client's requirements) 

2) pp bag+ 20-25KG/carton ( 8 boxes in 1 carton)

Shipping Details: By Air or By Sea, or according to the requirement of you.

 

 

 

FAQ

 

1.Q: Are you a trading company or manufacturer?

A: We are an industry and trade integration business for 20 years, our company office located in the Dongcheng area, Dongguan.

 

2.Q: How long is your delivery time?

A: Generally it is about 10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity and drawings.

 

3.Q: Do you provide samples? Is it free or extra?

A: Yes, samples for free charge could be offered before official order.

 

4.Q: How does your factory control product quality?

A: ISO9001: 2008, ISO / TS16949 Certificated, independent quality control team with 10 inspectors in our factory. Third-party certificated and factory audit accepted. Third-party quality control accepted.

 

5.Q: What about the payment terms?

A: Trade term - FOB/CIF/CNF/EXW, we could all accept and negotiate quotation.

 

6.Q: Do you provide ODM/OEM service?

A: OEM / ODM is welcome, We own a professional and creative R&D team, and customized colors are optional. From the concept to finished goods, we do all ( design, prototype reviewing, tooling and production ) in the factory. 

 

 

Contact Info

 

Leela Lee
Jinpeng Hardware Tech
Phone:+86 137 1283 3259
Email: leela@jpfasteners.com