---
title: "M1.6 PEEK Engineering Plastic Micro Countersunk Screws Dimensions"
description: "M1.6 PEEK Engineering Plastic Micro Countersunk Screws: head diameter 2.3 mm, coarse thread pitch 0.35 mm, clearance hole (ISO 273 medium) 1.8 mm."
url: https://engineeringhardware.com/guide/size/m1-6-peek-engineering-plastic-micro-countersunk-screws/
source: Engineering Hardware & Fasteners
---

# M1.6 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.

M1.6 PEEK Engineering Plastic Micro Countersunk Screws dimensions to Trade series (PEEK micro screws): head diameter 2.3 mm, coarse thread pitch 0.35 mm, clearance hole (ISO 273 medium) 1.8 mm, tapping drill 1.25 mm. Tighten to approximately 0.2 Nm at property class 8.8 in a dry, as-supplied condition.

- **Head diameter:** 2.3 mm
- **Coarse thread pitch:** 0.35 mm
- **Clearance hole (ISO 273 medium):** 1.8 mm
- **Tapping drill:** 1.25 mm
- **Tightening torque (class 8.8):** 0.2 Nm

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

![M1.6 PEEK Engineering Plastic Micro Countersunk Screws Dimensions reference image](https://engineeringhardware.com/wp-content/uploads/2026/09/PEEK-RENY-Plastic-Micro-Countersunk-Screws.webp)

The M1.6 size of PEEK Engineering Plastic Micro Countersunk Screws is dimensioned by Trade series (PEEK micro screws). The tables below give the dimensional row from the standard, the drill and spanner sizes that go with it, and the assembly torque per property class. The technical drawing on this page redraws to the exact values selected.

## M1.6 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) |
| --- | --- | --- | --- | --- | --- | --- |
| M1.6 |  | 2.3 | cross recess No. 0 | PEEK engineering plastic |  |  |

## Spanner & Drive for M1.6 PEEK Engineering Plastic Micro Countersunk Screws

Drive geometry for M1.6 PEEK Engineering Plastic Micro Countersunk Screws is given by the row above; match the tool to the listed values.

## Hole Sizes for M1.6

| Coarse-thread pitch (ISO 724) | 0.35 mm |
| --- | --- |
| Through-hole / clearance (ISO 273 medium) | 1.8 mm |
| Tapping drill, coarse thread | 1.25 mm |

## Tightening Torque for M1.6

| Class 8.8 (dry, ~µ 0.125) | ≈ 0.2 Nm |
| --- | --- |
| Class 10.9 (dry, ~µ 0.125) | ≈ Nm |
| Class 12.9 (dry, ~µ 0.125) | ≈ 0.3 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 M1.6

| Tensile stress area As (ISO 724) | 1.3 mm² |
| --- | --- |
| Proof load, class 8.8 | 0.7 kN |
| Proof load, class 12.9 | 1.2 kN |
| Min. ultimate tensile load, class 8.8 | 1 kN |

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.

## Installation Tips for M1.6 PEEK Engineering Plastic Micro Countersunk Screws

- At M1.6 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 M1.6

For M1.6, pair with a M1.6 hex nut (ISO 4032 / DIN 934) and, where used, a M1.6 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 M1.6 PEEK engineering plastic micro countersunk screws. Head form and drive can be specified to the assembly rather than to a standard: a larger bearing face, a security drive, or a socket sized for the tool already on the bench. 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 M1.6 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.

- **Head diameter (mm):** 2.3
- **Drive:** cross recess No. 0
- **Material:** PEEK engineering plastic

## 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

## Related Plastic Micro Screws products

[![Premium Flat Head Confirmat Screws for Reliable Wood Joinery](https://img.engineeringhardware.com/Premium-Flat-Head-Confirmat-Screws-for-Reliable-Wood-Joinery.webp)](https://engineeringhardware.com/product/premium-flat-head-confirmat-screws-for-reliable-wood-joinery/)

Countersunk & Flat-Head Machine Screws

### [Premium Flat Head Confirmat Screws for Reliable Wood Joinery](https://engineeringhardware.com/product/premium-flat-head-confirmat-screws-for-reliable-wood-joinery/)

Other · DIN

**Price on request**MOQ 200,000 pieces

[![Release Tripod Stainless Steel Flat Countersunk Head Slotted Micro Mount Mounting Screw Camera Screw](https://img.engineeringhardware.com/Release-Tripod-Stainless-Steel-Flat-Countersunk-Head-Slotted-Micro-Mount-Mounting-Screw-Camera-Screw.webp)](https://engineeringhardware.com/product/release-tripod-stainless-steel-flat-countersunk-head-slotted-micro-mount-mounting/)

Countersunk & Flat-Head Machine Screws

### [Release Tripod Stainless Steel Flat Countersunk Head Slotted Micro Mount Mounting Screw Camera Screw](https://engineeringhardware.com/product/release-tripod-stainless-steel-flat-countersunk-head-slotted-micro-mount-mounting/)

Round Head · DIN, GB, ANSI, BSW, JIS, GOST, Customized

**US$0.12**MOQ 100,000 pieces

[![Furniture Connection Screws and Nuts Flat Head Cross Screws](https://img.engineeringhardware.com/Furniture-Connection-Screws-and-Nuts-Flat-Head-Cross-Screws.webp)](https://engineeringhardware.com/product/furniture-connection-screws-and-nuts-flat-head-cross-screws/)

Countersunk & Flat-Head Machine Screws

### [Furniture Connection Screws and Nuts Flat Head Cross Screws](https://engineeringhardware.com/product/furniture-connection-screws-and-nuts-flat-head-cross-screws/)

Round Head · DIN, GB, ANSI, BSW, JIS, GOST

**US$0.06 – 12.00**MOQ 1 kilogram

[![Steel Countersunk Head Star Machine Screw Torx Flat Head Screws](https://img.engineeringhardware.com/Steel-Countersunk-Head-Star-Machine-Screw-Torx-Flat-Head-Screws.webp)](https://engineeringhardware.com/product/steel-countersunk-head-star-machine-screw-torx-flat-head-screws/)

Countersunk & Flat-Head Machine Screws

### [Steel Countersunk Head Star Machine Screw Torx Flat Head Screws](https://engineeringhardware.com/product/steel-countersunk-head-star-machine-screw-torx-flat-head-screws/)

Torx Countersunk Head · DIN, GB, ANSI, BSW, JIS, GOST

**US$0.06**MOQ 202,511 pieces

[![Custom Countersunk Screws, 304/316 Stainless Steel, Torx Hex Cross, Furniture Wood Concrete Connecting Screws](https://img.engineeringhardware.com/Custom-Countersunk-Screws-304-316-Stainless-Steel-Torx-Hex-Cross-Furniture-Wood-Concrete-Connecting-Screws.webp)](https://engineeringhardware.com/product/custom-countersunk-screws-304-316-stainless-steel-torx-hex-cross-furniture-wood/)

Countersunk & Flat-Head Machine Screws

### [Custom Countersunk Screws, 304/316 Stainless Steel, Torx Hex Cross, Furniture Wood Concrete Connecting Screws](https://engineeringhardware.com/product/custom-countersunk-screws-304-316-stainless-steel-torx-hex-cross-furniture-wood/)

Ss/Steel · Hex

**US$0.012 – 0.018**MOQ 300 mpcs

[![Bamboo Screw Stainless Steel 304/316 Locking Screw Csk Pozi](https://img.engineeringhardware.com/Bamboo-Screw-Stainless-Steel-304-316-Locking-Screw-Csk-Pozi.webp)](https://engineeringhardware.com/product/bamboo-screw-stainless-steel-304-316-locking-screw-csk-pozi/)

Countersunk & Flat-Head Machine Screws

### [Bamboo Screw Stainless Steel 304/316 Locking Screw Csk Pozi](https://engineeringhardware.com/product/bamboo-screw-stainless-steel-304-316-locking-screw-csk-pozi/)

Countersunk Head · DIN, GB, Inch

**US$0.0012 – 0.0024**MOQ 1,000 pieces

[View all Countersunk & Flat-Head Machine Screws →](https://engineeringhardware.com/fastener-products/screws/countersunk-flat-head-machine-screws/) [Full product catalog](https://engineeringhardware.com/products/)

## Applications & Industries for M1.6 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 is the coarse-thread pitch of M1.6 for PEEK Engineering Plastic Micro Countersunk Screws?

For M1.6 the standard coarse pitch is 0.35 mm — this is the value used for PEEK Engineering Plastic Micro Countersunk Screws.

### What torque do M1.6 class 8.8 PEEK Engineering Plastic Micro Countersunk Screws take?

A dry M1.6 class 8.8 joint takes about 0.2 Nm (≈ Nm for 10.9, ≈ 0.3 Nm for 12.9). Confirm against your joint design; lubrication reduces these values.

### What clearance and tapping drill suit M1.6?

Use a 1.8 mm clearance hole (ISO 273 medium) for through-fixing, or a 1.25 mm tapping drill for a coarse M1.6 thread.

### Is M1.6 PEEK Engineering Plastic Micro Countersunk Screws suitable for electronics and small mechanisms?

M1.6 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.

### 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/)