---
title: "M1.2 PEEK Engineering Plastic Micro Countersunk Screws Dimensions"
description: "M1.2 PEEK Engineering Plastic Micro Countersunk Screws: head diameter 2.3 mm, head height 58 mm, coarse thread pitch 0.25 mm."
url: https://engineeringhardware.com/guide/size/m1-2-peek-engineering-plastic-micro-countersunk-screws/
source: Engineering Hardware & Fasteners
---

# M1.2 PEEK Engineering Plastic Micro Countersunk Screws Dimensions

Screws · Trade series (PEEK micro screws)

Controlling dimensions to Trade series (PEEK micro screws), with clearance hole and tapping drill, spanner or drive size and tightening torque.

M1.2 PEEK Engineering Plastic Micro Countersunk Screws dimensions to Trade series (PEEK micro screws): head diameter 2.3 mm, head height 58 mm, coarse thread pitch 0.25 mm, clearance hole (ISO 273 medium) 1.4 mm.

- **Head diameter:** 2.3 mm
- **Head height:** 58 mm
- **Coarse thread pitch:** 0.25 mm
- **Clearance hole (ISO 273 medium):** 1.4 mm

Figures are nominal values from the governing standard. Confirm against the tolerance class for your application before machining or ordering.

![M1.2 PEEK Engineering Plastic Micro Countersunk Screws Dimensions reference image](https://engineeringhardware.com/wp-content/uploads/2026/09/PEEK-RENY-Plastic-Micro-Countersunk-Screws.webp)

M1.2 is one of the standard coarse-thread sizes for peek engineering plastic micro countersunk screws under Trade series (PEEK micro screws). The sections below reproduce the dimensional row, list the matching tools and hole sizes, and summarize where this size is normally specified.

## M1.2 Dimensional Row (Trade series (PEEK micro screws))

| Thread size | Example length (mm) | Head diameter (mm) | Drive | Material | Example tensile break load (N) | Example torsional break torque (Nu00b7m) |
| --- | --- | --- | --- | --- | --- | --- |
| M1.2 | 2.5 | 2.3 | cross recess No. 0 | PEEK engineering plastic | 58 | 0.03 |

## Spanner & Drive for M1.2 PEEK Engineering Plastic Micro Countersunk Screws

Drive geometry for M1.2 PEEK Engineering Plastic Micro Countersunk Screws is given by the row above; match the tool to the listed values.

## Hole Sizes for M1.2

| Coarse-thread pitch (ISO 724) | 0.25 mm |
| --- | --- |
| Through-hole / clearance (ISO 273 medium) | 1.4 mm |
| Tapping drill, coarse thread | 0.95 mm |

## Tightening Torque for M1.2

| Class 8.8 (dry, ~µ 0.125) | ≈ Nm |
| --- | --- |
| Class 10.9 (dry, ~µ 0.125) | ≈ Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ Nm |

Indicative dry-joint values. Lubrication can lower the required torque by 15–25%. Always confirm against the joint design, especially when going up a strength class.

## Proof Load & Strength for M1.2

| Tensile stress area As (ISO 724) | 0.7 mm² |
| --- | --- |

Proof load = tensile stress area × the proof stress Sp of the class, per ISO 898-1 — Sp is a lower figure than the yield stress Rp0.2 and the two are not interchangeable. The stress area is computed from this size's own diameter and pitch, so a fine-pitch designation gives the fine-pitch figure. Design the joint so the working preload stays below the proof load of the class selected.

## M1.2 PEEK Engineering Plastic Micro Countersunk Screws Weight

A steel M1.2 peek engineering plastic micro countersunk screws at the listed 2.5 mm length weighs approximately 0.0 g each — about 0.0 kg per 1,000 pieces. Stainless A2/A4 weighs roughly the same (density 7.9–8.0 g/cm³).

Actual weight varies slightly with head form, thread and finish; use this figure for freight estimation only.

## Installation Tips for M1.2 PEEK Engineering Plastic Micro Countersunk Screws

- At M1.2 the joint is sensitive to over-torque — use a torque-limiting driver and check the head doesn't bury into a softer counterpart.

## Mating Parts for M1.2

For M1.2, pair with a M1.2 hex nut (ISO 4032 / DIN 934) and, where used, a M1.2 flat washer (ISO 7089 / DIN 125A) under the head and under the nut.

Custom manufacturing · Made to drawing

## Need PEEK engineering plastic micro countersunk screws in a size this table does not list?

This page covers M1.2 PEEK engineering plastic micro countersunk screws. Thread size and pitch, length, property class, drive form, head geometry and head marking are all specifiable — the standard part is where it starts, not where it stops. Made by cold heading or warm forging.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

[Custom screw manufacturing](https://engineeringhardware.com/custom/screws/)[Send a drawing](https://engineeringhardware.com/custom/screws/#rfq)

## Technical Drawing

Dimensioned line drawing of M1.2 PEEK Engineering Plastic Micro Countersunk Screws to Trade series (PEEK micro screws). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Example length (mm):** 2.5
- **Head diameter (mm):** 2.3
- **Drive:** cross recess No. 0
- **Material:** PEEK engineering plastic
- **Example tensile break load (N):** 58
- **Example torsional break torque (Nu00b7m):** 0.03

## Dimensions & Specifications (Trade series (PEEK micro screws))

| Thread size | Example length (mm) | Head diameter (mm) | Drive | Material | Example tensile break load (N) | Example torsional break torque (Nu00b7m) |
| --- | --- | --- | --- | --- | --- | --- |
| M1.2 | 2.5 | 2.3 | cross recess No. 0 | PEEK engineering plastic | 58 | 0.03 |
| M1.4 |  | 2.3 | cross recess No. 0 | PEEK engineering plastic |  |  |
| M1.6 |  | 2.3 | cross recess No. 0 | PEEK engineering plastic |  |  |

Product catalog

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## Applications & Industries for M1.2 PEEK Engineering Plastic Micro Countersunk Screws

PEEK Engineering Plastic Micro Countersunk Screws are bought for a small number of well-defined jobs. These are the ones we ship them for. Stocked from M1.2 to M1.6.

### Industries that specify PEEK Engineering Plastic Micro Countersunk Screws

- **Prototype assemblies:** Countersunk plastic screws avoid a metal head near the component.
- **Insulated electronics:** Engineering-plastic screws provide a nonconductive threaded joint in a compact package.
- **Vacuum and analytical equipment:** Low-outgassing plastic is used around sensitive instruments.
- **Chemical equipment:** PEEK resists service environments where ordinary metal hardware may be unsuitable.
- **Automotive & transport:** Chassis, driveline and body fixings that see vibration and are assembled to a controlled preload.
- **Steel fabrication:** Bolted connections in frames, enclosures, walkways and weldments, on the bench and on site.

### Typical applications

- using the 90-degree head seat and No. 0 recess
- providing electrical insulation with a miniature countersunk screw
- checking the documented break loads instead of borrowing metal-screw torque
- matching the plastic screw to the parent thread without over-driving it
- joints where the property class is stated on the drawing
- clamping two machined faces to a calculated preload

### Service conditions to specify against

- **Marine and coastal:** Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
- **High load:** Supplied in ISO 898-1 property classes, so the joint can be designed to a stated proof load and tightened to a calculated torque rather than by feel.
- **Torque and preload:** The joint is designed around bolt tension, so lubrication, coating and the friction coefficient all change the torque figure — state them together.

### Where to use something else

- Do not substitute metal-fastener torque for the plastic break-torque example; over-driving can fracture the screw.
- Do not use a machine thread into unthreaded sheet or timber; use a tapping screw, rivet nut or insert made for that parent material.

[Full application guide: where PEEK Engineering Plastic Micro Countersunk Screws are used, how to specify them, and the cases they are wrong for](https://engineeringhardware.com/applications/peek-engineering-plastic-micro-countersunk-screws/)

Inside the plant

## Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

1. ![Wire rod feeding into a cold heading machine](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 01 **Cold heading** Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail. Head dimensions and under-head radius checked at set-up and per shift.
2. ![Thread rolling machine producing bolt threads](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 02 **Thread rolling** Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch. Go / no-go ring gauges to ISO 965 tolerance class 6g.
3. ![Baskets of bolts staged for heat treatment](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 03 **Heat treatment** Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it. Core hardness and tensile tested per lot to ISO 898-1.
4. ![Zinc plated bolts in a treatment basket](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 04 **Surface treatment** Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list. Coating thickness and neutral salt spray hours to ISO 9227.

## Frequently Asked Questions

### What torque do M1.2 class 8.8 PEEK Engineering Plastic Micro Countersunk Screws take?

A dry M1.2 class 8.8 joint takes about Nm (≈ Nm for 10.9, ≈ Nm for 12.9). Confirm against your joint design; lubrication reduces these values.

### What clearance and tapping drill suit M1.2?

Use a 1.4 mm clearance hole (ISO 273 medium) for through-fixing, or a 0.95 mm tapping drill for a coarse M1.2 thread.

### Is M1.2 PEEK Engineering Plastic Micro Countersunk Screws suitable for electronics and small mechanisms?

M1.2 PEEK Engineering Plastic Micro Countersunk Screws is in the micro range and is widely used in electronics, instrument enclosures and small precision mechanisms. Watch the over-torque margin — micro joints strip easily.

### What's the typical proof load behavior of M1.2 class 8.8?

Micro-thread joints are sensitive to plastic deformation in the first turn under load — use a torque-limiting driver and check the bearing surface deformation on softer mating materials.

### How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.

## Related Pages

[View the full PEEK Engineering Plastic Micro Countersunk Screws page](https://engineeringhardware.com/fastener/peek-engineering-plastic-micro-countersunk-screws/)

### More PEEK Engineering Plastic Micro Countersunk Screws Guides