---
title: "Surface Treatment Customized Metric Flat Countersunk Csk Head Machine Screw"
description: "Surface Treatment Customized Metric Flat Countersunk Csk Head Machine Screw — Countersunk & Flat-Head Machine Screws. MOQ 200 pieces, US$0.096 – 0.14."
url: https://engineeringhardware.com/product/surface-treatment-customized-metric-flat-countersunk-csk-head-machine-screw/
source: Engineering Hardware & Fasteners
---

# Surface Treatment Customized Metric Flat Countersunk Csk Head Machine Screw

[![Surface Treatment Customized Metric Flat Countersunk Csk Head Machine Screw](https://img.engineeringhardware.com/Surface-Treatment-Customized-Metric-Flat-Countersunk-Csk-Head-Machine-Screw.webp)](https://img.engineeringhardware.com/Surface-Treatment-Customized-Metric-Flat-Countersunk-Csk-Head-Machine-Screw.webp)

- Standard & made-to-drawing parts
- Checked before shipping
- Air, sea & express delivery

[Screws › Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/)

Updated 2026-11-04 · [Markdown version](https://engineeringhardware.com/product/surface-treatment-customized-metric-flat-countersunk-csk-head-machine-screw.md)

Model no. **UNF-12**

US$0.096 – 0.14 / piece

MOQ 200 pieces · Final price confirmed in your quote

- **Material:** Stainless Steel
- **Head Style:** Round
- **Standard:** DIN, GB, ANSI, BSW, JIS, GOST
- **Grade:** 8.8
- **Surface Treatment:** Zinc Plated, Ruspert, Dacromet, Customized

Get a quote [WhatsApp](https://wa.me/8615999653684?text=Hi%20Engineering%20Hardware%20%26amp%3B%20Fasteners%2C%20I%20would%20like%20a%20quote%20for%3A%20Surface%20Treatment%20Customized%20Metric%20Flat%20Countersunk%20Csk%20Head%20Machine%20Screw%20%E2%80%94%20https%3A%2F%2Fengineeringhardware.com%2Fproduct%2Fsurface-treatment-customized-metric-flat-countersunk-csk-head-machine-screw%2F)

Specifications are as listed for this product. Engineering Hardware & Fasteners confirms ratings, mating parts, compatibility, packing and lead time with you before you order.

## Specifications

| Customization | Available |
| --- | --- |
| Material | Stainless Steel |
| Type | Round Head |
| Model NO. | UNF-12 |
| Groove | Phillips |
| Connection | Common Bolt |
| Head Style | Round |
| Standard | DIN, GB, ANSI, BSW, JIS, GOST |
| Grade | 8.8 |
| Surface Treatment | Zinc Plated, Ruspert, Dacromet, Customized |
| Delivery | Sea Freight, Air, Train, Express |
| Certification | ISO9001, BSCI |
| Sample | Yes |
| ODM/OEM | Accept |
| Transport Package | Carton Boxes + Pallets |
| Specification | M2~M8 |
| Origin | China |
| HS Code | 73181590 |
| Production Capacity | 700tons/Month |
| Category | [Countersunk & Flat-Head Machine Screws](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) |

## Technical parameters

| Union Stainless Steel Flat Head Machine Screw |
| --- |

| Name |
| --- |
| Flat Head Machine Screw |
| Material |
| Stainless Steel |
| Size |
| M2~M8 or non-standard as request&design |
| Length |
| 3MM~60MM or non-standard as request&design |
| Surface Treatment |
| Electrical Zinc Coating. Ruspert, Dacroment,etc,Customized |
| Quality |
| Sample Testing Or Third-party Inspection |
| Origin |
| Made in China |
| Lead Time |
| Based on quantity |

| Stainless Steel Chemical Composition |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Grade | C ≤ | Si ≤ | Mn ≤ | P ≤ | S ≤ | Ni | Cr | Mo | Other |
| 201 | 0.15 | 1.00 | 5.5-7.5 | 0.060 | 0.03 | 3.5-5.5 | 16-18 |  | N≤0.25 |
| 304 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-10.0 | 18-20 |  |  |
| 304L | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-12.0 | 18-20 |  |  |
| 321 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 8.0-13.0 | 17-19 |  | Ti≤5*C% |
| 316 | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 10.0-14.0 | 16-18 | 2-3 |  |
| 316L | 0.03 | 1.00 | 2.00 | 0.045 | 0.03 | 10.0-15.0 | 16-18 | 2-3 |  |
| 309S | 0.08 | 1.00 | 2.00 | 0.045 | 0.03 | 12.0-15.0 | 22-24 |  |  |
| 410 | 0.15 |  | 1.00 |  | 0.03 | - | 11.5-13.5 |  |  |
| 420 | 0.26-0.4 |  | 1.00 |  | 0.03 | - | 12-14 |  |  |
| 430 | 0.12 | 0.75 | 1.00 | 0.040 | 0.03 | - | 16-18 |  |  |

| Main Fastener Coating |  |  |  |
| --- | --- | --- | --- |
| Types | Application | Spray Test Hours | Characteristics |
| Zinc, Electroplated | All Metal | 96Hours | Lower cost and bright surface |
| Hot Dip Galvanized | All Metal | 96Hours | Low corrosion rate and resists mechanical damage. |
| Electro Nickel | All Metal | 200Hours | Flexibility in plating volume and thickness |
| Mechanical Plating | Steel | 1000Hours | Smooth finish with high anti-corrosion grade |
| Black Oxide | All Metal | 3-5Hours | Cheap |
| Dacrotized | Steel | 1000Hours | Pollution-free ceramic coating |
| Passivation | Stainless Steel | / | Dissolved iron contaminants |
| Wax | Stainless Steel & Plated Fasteners | Fair, used as a lubricate | Used for ease of assembly |

## Description

Surface Treatment Customized Metric Flat Countersunk Csk Head Machine Screw is part of our countersunk & flat-head machine screws range (Screws).

### Key details

- **Type:** Round Head
- **Standard:** DIN, GB, ANSI, BSW, JIS, GOST
- **Material:** Stainless Steel
- **Grade:** 8.8
- **Head Style:** Round
- **Groove:** Phillips
- **Surface Treatment:** Zinc Plated, Ruspert, Dacromet, Customized
- **Connection:** Common Bolt

Available configurations include material, head style, standard, grade and surface treatment. Custom sizes, threads, materials, grades, platings and packaging can be quoted on request.

### Ordering through Engineering Hardware & Fasteners

Minimum order is 200 pieces at US$0.096 – 0.14 per piece. Send one inquiry with the part number, quantity and destination, and Engineering Hardware & Fasteners confirms size, thread, material, grade, finish, price, lead time and shipping, checks the goods before dispatch and ships them to you.

## Frequently asked questions

### What is the minimum order quantity (MOQ) for Surface Treatment Customized Metric Flat Countersunk Csk Head Machine Screw?

The listed minimum order is 200 pieces, at US$0.096 – 0.14 per piece. Smaller trial quantities or samples can be requested in your inquiry; Engineering Hardware & Fasteners confirms what is possible for your size.

### What are the main specifications of Surface Treatment Customized Metric Flat Countersunk Csk Head Machine Screw?

Type: Round Head; Standard: DIN, GB, ANSI, BSW, JIS, GOST; Material: Stainless Steel; Grade: 8.8; Head Style: Round; Groove: Phillips. The full specification table and any technical parameter tables are listed on this page.

### Can this product be customized (OEM)?

Listed configurations include material, head style, standard, grade and surface treatment. Size, thread, length, material and grade, surface finish, head marking, packaging and labels can be quoted to your specification or drawing.

### What is the lead time and how is it shipped?

Lead time depends on quantity and customization and is confirmed in your quote. Engineering Hardware & Fasteners checks the goods before dispatch and ships by express, air or sea; mixed orders can be consolidated in one shipment.

### Which other countersunk & flat-head machine screws are available?

The Countersunk & Flat-Head Machine Screws category lists 2,424 products in different sizes, materials and finishes: [https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/)

How we work

## Specified, checked and shipped by Engineering Hardware & Fasteners

Engineering Hardware & Fasteners supplies bolts, screws, nuts, washers, anchors, rivets and fastening hardware to equipment makers, contractors, distributors and maintenance teams. Orders go through one controlled process: size, thread, material, grade and finish confirmed, samples approved, dimensions, thread fit and plating checked before packing, then packed for export — standard or made to drawing.

- DIN, ISO, ASTM, ANSI, JIS and GB standard parts
- Non-standard parts made to your drawing
- Dimensions, thread gauges and plating checked before packing
- Export cartons and pallets, consolidated mixed orders
- Samples available for approval before mass production

[![Production floor](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor-1024x683.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-01-production-floor.webp)

Production floor

[![Inspection bench](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-02-inspection-bench.webp)

Inspection bench

[![Sorting & packing](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-03-sorting-and-packing.webp)

Sorting & packing

[![Parts warehouse](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/factory-04-parts-warehouse.webp)

Parts warehouse

[![Sample review](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-02-office-sample-review.webp)

Sample review

[![Sales office](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office-768x512.webp)](https://engineeringhardware.com/wp-content/uploads/2026/11/office-01-daily-sales-office.webp)

Sales office

[More about us →](https://engineeringhardware.com/about/) · [Request a sample or custom quote →](https://engineeringhardware.com/contact/)

## Request a quote for this product

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