Hem Maskinskruv Rundhuvudsskruv Springhuvud rundhuvud bult 4-40 x 3/8" Round Head Slotted Machine Screw Steel Black

4-40 x 3/8" Round Head Slotted Machine Screw Steel Black

Skruv
Skruv
Art nr. MRL0406B rohs Betyg:

material Svart galvaniserad stål
Leveransdatum 2026-11-20
Huvud Rundhuvud
drift Spring   0.031-0.039" width
Huvuddiameter 0.193-0.211" inch
Huvudhöjd 0.075-0.086" inch
Gänga 4-40
Längd 3/8 inch
Styckpris USD$ 0.023 /st
Enhetsvikt 0.560 g
Kvantitet st
Belopp USD$ Total_Amount USD$
Belopp USD$ Total_Amount USD$
  
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Objektinformation

Why Choose MRL0406B?

MRL0406B is a 4-40 Round Head head Slot drive screw with 3/8 inches length, featuring a Black Zinc Plated Steel finish. Compared to alternative finishes in the same specification such as MRL0406S (SUS304 Stainless Steel), MRL0406Z (Blue Zinc Plated Steel), the Black Zinc Plated Steel of MRL0406B 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 MRL0406B screw is manufactured to industry standards, RoHS compliant, and supplied with material test reports (MTR) for full quality traceability.

4-40 x 3/8" Round Head Slotted Machine Screw Steel Black
MRL0406B detail_des
Det är Round Head med Slot drift, 4-40 Gänga och 3/8 inch Längd .
material Black Zinc Plated Steel, Ytbehandling är Rohs Black som har god funktion av antikorrosion .
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KÖP MRL0406B - 4-40 x 3/8 Round Head Slotted Machine Screw - Black Zinc Steel for Precision Assembly | Superneer idag, högkvalitativ produkt och bästa service kommer att levereras av Superneer. Varje beställning kommer att skickas i tid.
Different Finish :
4-40 x 3/8 inch
4-40 x 3/8 inch
MRL0406S
SUS304 Stainless Steel
4-40 x 3/8 inch
4-40 x 3/8 inch
MRL0406Z
Blue Zinc Plated Steel
4-40 x 3/8 inch
4-40 x 3/8 inch
MRL0406B
Black Zinc Plated Steel
4-40 x 3/8" 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.

Vanliga frågor om MRL0406B

What is MRL0406B screw?

MRL0406B is a 4-40 Round Head head Slot drive screw made of Black Zinc Plated Steel, manufactured by Superneer Limited. It has a length of 3/8 inches and is commonly used in electronics, watches, precision instruments, and 3D printers.

What are the specifications of MRL0406B?

The MRL0406B screw features thread size 4-40, length of 3/8 inches, head type Round Head (head diameter 0.193-0.211 inches), drive type Slot (drive size 0.031-0.039" width), and is made of Black Zinc Plated Steel.

What material is the MRL0406B screw made of?

The MRL0406B 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 MRL0406B?

The MRL0406B screw has a 4-40 thread. This is a UNC (Unified National Coarse) thread with 4-40 specification, widely used in North American applications.

What are MRL0406B screws used for?

MRL0406B 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 MRL0406B?

The minimum order quantity (MOQ) for MRL0406B is 10,000 pieces. The unit price is $0.023 USD for MOQ quantity. Larger quantities receive discounted pricing. Contact [email protected] for custom quotes.

What is the lead time and shipping for MRL0406B?

The lead time for MRL0406B 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 metric equivalent of 4-40 thread?

The 4-40 thread is approximately equivalent to M2.5 to M3 (approx). When substituting inch screws with metric screws, always verify the actual diameter and pitch compatibility.

What head type does MRL0406B use and why?

The MRL0406B 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 MRL0406B (4-40, 3/8 inches), ensure your application requires this specific size.

What is the difference between MRL0406B and similar parts?

MRL0406B uses Black Zinc Plated Steel finish, while alternative variants in the same thread/length specification include MRL0406S (SUS304 Stainless Steel), MRL0406Z (Blue Zinc Plated Steel). The Black Zinc Plated Steel of MRL0406B 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 MRL0406B the preferred choice when these properties align with your application requirements.

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