Home Machine Screws Round Head Screw Slotted Round Head Bolt M3 x 6 mm Round Head Slotted Machine Screw Steel Black

M3 x 6 mm Round Head Slotted Machine Screw Steel Black

Screw
Screw
Part No. MRLM306B rohs Rating:

material Black Zinc Plated Steel
Ship Date 2026-11-18
Head Round Head
drive Slot   0.8-0.96mm width
Head Diameter 4.7-5 mm
Head Height 1.85-2.15 mm
Thread M3
Length 6 mm
Unit Price USD$ 0.016 /pcs
Unit Weight 0.411 g
Quantity pcs
Amount USD$ Total Amount USD$
Amount USD$ Total Amount USD$
  
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Item Information

Why Choose MRLM306B?

MRLM306B is a M3 Round Head head Slot drive screw with 6 mm length, featuring a Black Zinc Plated Steel finish. Compared to alternative finishes in the same specification such as MRLM306S (SUS304 Stainless Steel), MRLM306Z (Blue Zinc Plated Steel), the Black Zinc Plated Steel of MRLM306B offers a black decorative finish combined with good corrosion resistance, ideal for consumer electronics, automotive interiors, and applications where both appearance and rust prevention matter. The Round Head head design ensures optimal load distribution across the mating surface, while the Slot drive allows efficient torque transmission during installation. Each MRLM306B screw is manufactured to industry standards, RoHS compliant, and supplied with material test reports (MTR) for full quality traceability.

M3 x 6 mm Round Head Slotted Machine Screw Steel Black
MRLM306B This part demension will be same as the drawing indicate below, length tolerance will be ±0.5 .
It is Round Head with Slot drive, M3 Thread and 6 mm Length .
material Black Zinc Plated Steel, Finsh is Rohs Black which has good function of anti-corrosion .
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BUY MRLM306B - M3 x 6 mm Round Head Slotted Machine Screw - Black Zinc Steel for Precision Assembly | Superneer today,high quality product and best service will be provided by superneer.Each order will be made shippment on time.
Different Finish :
M3 x 6 mm
M3 x 6 mm
MRLM306S
SUS304 Stainless Steel
M3 x 6 mm
M3 x 6 mm
MRLM306Z
Blue Zinc Plated Steel
M3 x 6 mm
M3 x 6 mm
MRLM306B
Black Zinc Plated Steel
M3 x 6 mm Round Head Slotted Machine Screw Steel Black
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Payment & Trasportation 5-10 days

Payment Method: T/T & Paypal and other payment method

Shipment Method: Air Express , Air Freight, Sea Shippment

How to Order

1. Order online directly, made payment via Paypal or bank transfer.

2. Superneer arrange production according to drawing,all demensions are within drawing specification.

3. Parts ready, ship to customer.

Frequently Asked Questions about MRLM306B

What is MRLM306B screw?

MRLM306B is a M3 Round Head head Slot drive screw made of Black Zinc Plated Steel, manufactured by Superneer Limited. It has a length of 6 mm and is commonly used in electronics, watches, precision instruments, and 3D printers.

What are the specifications of MRLM306B?

The MRLM306B screw features thread size M3, length of 6 mm, head type Round Head (head diameter 4.7-5 mm), drive type Slot (drive size 0.8-0.96mm width), and is made of Black Zinc Plated Steel.

What material is the MRLM306B screw made of?

The MRLM306B screw is made of Black Zinc Plated Steel. Superneer provides material test reports (MTR) and RoHS compliance certificates for all products. Black Zinc Plated Steel offers excellent corrosion resistance and mechanical strength.

What is the thread size of MRLM306B?

The MRLM306B screw has a M3 thread. This is a metric thread with M3 specification, commonly used in international applications following ISO standards.

What are MRLM306B screws used for?

MRLM306B Round Head head Slot drive screws are used in electronics assembly, PCB mounting, precision instruments, watches, 3D printers, optical devices, medical equipment, and consumer products where reliable fastening with Round Head head aesthetics is required.

What is the MOQ and price for MRLM306B?

The minimum order quantity (MOQ) for MRLM306B is 10,000 pieces. The unit price is $0.016 USD for MOQ quantity. Larger quantities receive discounted pricing. Contact [email protected] for custom quotes.

What is the lead time and shipping for MRLM306B?

The lead time for MRLM306B is 15-25 days for production. Shipping to USA takes 5-15 days via sea freight, with shipping cost starting from $50 USD. Air freight is available for urgent orders. DDP and FOB terms are both available.

What is the inch equivalent of M3 thread?

The M3 thread is approximately equivalent to #6 (approx 6-32). When substituting metric screws with inch screws, always verify the actual diameter and pitch compatibility.

What head type does MRLM306B use and why?

The MRLM306B uses a Round Head head type. Round Head head provides a specific head design optimized for its intended application. This head type is selected based on the specific application requirements for load distribution, aesthetics, and accessibility.

How to choose the right screw size for my application?

To choose the right screw: 1) Determine the required thread size based on the tapped hole or nut; 2) Select the appropriate length based on the material thickness; 3) Choose the head type based on clearance and aesthetics; 4) Select the drive type based on torque requirements; 5) Choose the material based on environmental conditions. For MRLM306B (M3, 6 mm), ensure your application requires this specific size.

What is the difference between MRLM306B and similar parts?

MRLM306B uses Black Zinc Plated Steel finish, while alternative variants in the same thread/length specification include MRLM306S (SUS304 Stainless Steel), MRLM306Z (Blue Zinc Plated Steel). The Black Zinc Plated Steel of MRLM306B is specifically selected because it offers a black decorative finish combined with good corrosion resistance, ideal for consumer electronics, automotive interiors, and applications where both appearance and rust prevention matter. This distinction makes MRLM306B the preferred choice when these properties align with your application requirements.

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