Home Machine Screws Round Head Screw Slotted Round Head Bolt M4 x 12mm Round Head Slotted Machine Screw Steel Black

M4 x 12mm Round Head Slotted Machine Screw Steel Black

Screw
Screw
Part No. MRLM412B rohs Rating:

material Black Zinc Plated Steel
Ship Date 2026-11-17
Head Round Head
drive Slot   1-1.25mm width
Head Diameter 6.5-7 mm
Head Height 2.45-2.75 mm
Thread M4
Length 12 mm
Unit Price USD$ 0.035 /pcs
Unit Weight 1.421 g
Quantity pcs
Amount USD$ Total Amount USD$
Amount USD$ Total Amount USD$
  
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Item Information

Why Choose MRLM412B?

MRLM412B is a M4 Round Head head Slot drive screw with 12 mm length, featuring a Black Zinc Plated Steel finish. Compared to alternative finishes in the same specification such as MRLM412S (SUS304 Stainless Steel), MRLM412Z (Blue Zinc Plated Steel), the Black Zinc Plated Steel of MRLM412B 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 MRLM412B screw is manufactured to industry standards, RoHS compliant, and supplied with material test reports (MTR) for full quality traceability.

M4 x 12mm Round Head Slotted Machine Screw Steel Black
MRLM412B This part demension will be same as the drawing indicate below, length tolerance will be ±0.5 .
It is Round Head with Slot drive, M4 Thread and 12 mm Length .
material Black Zinc Plated Steel, Finsh is Rohs Black which has good function of anti-corrosion .
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BUY MRLM412B - M4 x 12mm 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 :
M4 x 12 mm
M4 x 12 mm
MRLM412S
SUS304 Stainless Steel
M4 x 12 mm
M4 x 12 mm
MRLM412Z
Blue Zinc Plated Steel
M4 x 12 mm
M4 x 12 mm
MRLM412B
Black Zinc Plated Steel
M4 x 12mm 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 MRLM412B

What is MRLM412B screw?

MRLM412B is a M4 Round Head head Slot drive screw made of Black Zinc Plated Steel, manufactured by Superneer Limited. It has a length of 12 mm and is commonly used in electronics, watches, precision instruments, and 3D printers.

What are the specifications of MRLM412B?

The MRLM412B screw features thread size M4, length of 12 mm, head type Round Head (head diameter 6.5-7 mm), drive type Slot (drive size 1-1.25mm width), and is made of Black Zinc Plated Steel.

What material is the MRLM412B screw made of?

The MRLM412B 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 MRLM412B?

The MRLM412B screw has a M4 thread. This is a metric thread with M4 specification, commonly used in international applications following ISO standards.

What are MRLM412B screws used for?

MRLM412B 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 MRLM412B?

The minimum order quantity (MOQ) for MRLM412B is 10,000 pieces. The unit price is $0.035 USD for MOQ quantity. Larger quantities receive discounted pricing. Contact [email protected] for custom quotes.

What is the lead time and shipping for MRLM412B?

The lead time for MRLM412B 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 M4 thread?

The M4 thread is approximately equivalent to #8 (approx 8-32). When substituting metric screws with inch screws, always verify the actual diameter and pitch compatibility.

What head type does MRLM412B use and why?

The MRLM412B 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 MRLM412B (M4, 12 mm), ensure your application requires this specific size.

What is the difference between MRLM412B and similar parts?

MRLM412B uses Black Zinc Plated Steel finish, while alternative variants in the same thread/length specification include MRLM412S (SUS304 Stainless Steel), MRLM412Z (Blue Zinc Plated Steel). The Black Zinc Plated Steel of MRLM412B 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 MRLM412B the preferred choice when these properties align with your application requirements.

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