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Class 12.9 Left Hand / Reverse Threaded Hex Head Screws Extreme Strength Black Metric

Basic Information
Place of Origin: China
Brand Name: FLRS or OEM
Certification: ISO9001
Model Number: FLRS-B023
Minimum Order Quantity: 100 pieces
Price: USD0.1-3/PC
Packaging Details: carton/ plywood cases/plywood pallets
Delivery Time: 8-30days
Payment Terms: T/T, L/C, Western union
Supply Ability: 20tons/month
Detail Information
Product Name: Extreme-Strength Reverse Threaded Hex Head Bolt Standard: DIN933,ASME B18.2.1, ISO 4017, IFI 149
Drive Style: External Hex Threading: Full Thread
Thread Direction: Left Hand Material: Carbon Steel Grade12.9
Finish: Black Oxide Thread Type: UNC,UNF
Size: M2-M48 Color: Black
High Light:

Class 12.9 Hex Head Screws


Reverse Threaded Hex Head Screws


Metric Left Hand Hex Bolt Screw

Product Description

Extreme-Strength Metric Class 12.9 Left-Hand / Reverse Threaded Hex Head Screws


Tighten these screws by turning them to the left; when secured, they prevent loosening of the counter-clockwise moving part.Choose these grade 12.9 steel screws With a tensile strength of 170,000 psi for heavy-duty stamping applications and earth-moving machinery such as bulldozers and excavators. 

1. Standard: DIN933, ASME B18.2.1, ISO 4017, ISO 4014, IFI 149
Grade: 12.9

3. Head type: Hex Head

4. Size: M6-M48;
5. Length: 6mm-200mm; 

6. Material: Carbon Steel

7. Finish: Black Oxide
Delivery time: 8-30 days based on the order quantity

9. Package: Cartons&pallets or according to customer's requirement


Standard DIN933, ASME B18.2.1, ISO 4017, ISO 4014, IFI 149
Size M6-M48
Material Carbon Steel
Grade Grade.12.9;
Thread UNC,UNF,
Finish Black Oxide
Packing Bulk in cartons on wood pallet or according to customer special demand.
Test Equipments Desktop direct- reading spectrometer, cutting machine, automatic pre- milling machine, polishing machin,
hard-testing gauge(Vickers), metallography microscope, electrolytic thickness gauge, tensile testing machine,
salt spray device, magnetic detection machine(magnetic particle flaw detector), Caliper, Go&No-go gauge and etc.
Supply Ability About 20 tons per month
MOQ 100pcs
Payment T/T, L/C 


High quality, properly completed - and the lasting success of the project depends on choosing the right materials. These finishing and full thread of the nut-bolt sturdy, rugged.

Cost-effectiveness - these bolts in considering and consider rust resistance, price, aesthetics and functionality at the same time, also considered to be the most price-friendly choice, but well-designed and durable

Easy to install and to use - it is very easy to install screws surface 6, as long as the wrench or socket to. If the upper space is limited, can be tightened with a wrench from the side there of. They are installed directly into the threaded hole in the compatible, or secured by nuts.

A wide range of applications - whether for the construction of doors, shelves, gates, fences, furniture or even install an electric motor, cap screws have a wide range of uses, from household, agricultural and office equipment to communications equipment, ship assembly, automotive and Machinery Industry


Class 12.9 Left Hand / Reverse Threaded Hex Head Screws Extreme Strength Black Metric 0

Class 12.9 Left Hand / Reverse Threaded Hex Head Screws Extreme Strength Black Metric 1

Class 12.9 Left Hand / Reverse Threaded Hex Head Screws Extreme Strength Black Metric 2

Class 12.9 Left Hand / Reverse Threaded Hex Head Screws Extreme Strength Black Metric 3






Q1: What is your main products?
A1: Our main products are fasteners: bolts, screws, nuts, washers, anchors and rivets.
Q2: How to ensure that every process's quality?

A2: Every process will be checked by our quality inspection department which insures every product's

quality. In the production of products, we will personally go to the factory to check the quality of


Q3: Do you offer free samples for checking the quality?
A3: Yes, the universal size are available for samples, but freight has to be paid by buyers.
Q4:Can you customize the products according to samples or drawing design?
A4:Yes. we have professional engineers to support the customized products for our customers. We can produce by your samples or technical drawings and build the molds and fixtures.
Q5: What is your payment method?
A5: 30% value of T/T in advance and other 70% balance before delivery.
For small order less than 3000USD, would suggest you pay 100% in advance to reduce the bank charges.



Contact Details
Fiona Hou

Phone Number : 13384956386

WhatsApp : +8613384956386