No.8 (4mm) x 170mm T40 Torx Ribbed Countersunk Chipboard Screws - Stainless Steel (A2)


Key Features

  • Thread Size (T): No.8 (4mm)
  • Length (L): 170mm
  • Torx Size: T40
  • Material: Stainless Steel (A2)
  • Finish: Natural
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No.8 (4mm) x 170mm T40 Torx Ribbed Countersunk Chipboard Screws - Stainless Steel (A2) Technical Specification

No.8 (4mm) x 170mm T40 Torx Ribbed Countersunk Chipboard Screws - Stainless Steel (A2) Drawing
Fully ThreadedNo
Head Diameter {Max} (D)8.0mm
Head Length (H)2.35mm
Length (L)170mm
Manufacturing StandardNot Standardised
MaterialStainless Steel (A2)
Material SpecificationStainless Steel (A2)
Metric or ImperialMetric
Thread Size (T)No.8 (4mm)
Torx SizeT40

Product Certifications

Certificate of Conformity Included
Certificate of Conformity Included
RoHS Certified
RoHS Certified
REACH Certified
REACH Certified
Quality Approved

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No.8 (4mm) x 170mm T40 Torx Ribbed Countersunk Chipboard Screws - Stainless Steel (A2) Description

The No.8 (4mm) x 170mm T40 Torx Ribbed Countersunk Chipboard Screws - Stainless Steel (A2) has the following features:

  • No.8 (4mm) Thread Size (T)
  • 2.35mm Head Length (H)
  • Not Standardised Manufacturing Standard
  • 170mm Length (L)
  • T40 Torx Size
  • No Fully Threaded
  • Stainless Steel (A2) Material
  • Stainless Steel (A2) Material Specification
  • Natural Finish
  • Metric Metric or Imperial
  • 8.0mm Head Diameter {Max} (D)

Discover more about the Torx Ribbed Countersunk Chipboard Screw range

A variant of our standard Torx Countersunk Chipboard Screws, fitted with external underhead milling ribs designed to aid installation and ensure fewer wood shavings are left on the surface. Featuring the popular Torx, or Star Drive, Torx Ribbed Countersunk Chipboard Screws benefit from increased cam-out resistance whilst being capable of higher torque transmission than traditional drives.

Countersunk Rib Head Screws like this are intended to be used within synthetic wooden boards, such as Chipboard and do not require a pilot hole for installation. The Countersunk Ribbed Head of the screw allows for the fastener to sit flush in the board, giving a smooth, clean finish.

This screw can be supplied either partially threaded, which can help with clamping strength, or in a fully threaded variant, suitable for applications where a full thread is required, such as for fastening thin pieces of metal to the Chipboard.

A self-drilling variant is also available in our range of Torx Ribbed Countersunk Chipboard Screws With Cutting Tip, designed to drive more easily into the material.


Ribbed Countersunk Chipboard Screws within this range are manufactured from either A2 Stainless Steel or Marine Grade Stainless Steel (A4). Both A2 and A4 Stainless Steels can be supplied with a chemical black finish.


Our range of 6-Lobe (Torx) Ribbed Countersunk Chipboard Screws are available in thread diameters ranging from No. 6 (3.5mm) to No. 10 (5mm), with lengths from 0mm to 3.2mm.

Shipping Information

Shipping Destinations:Worldwide.
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Weight Band (100 items):Over 5kg. Add to cart to calculate exact weights.

Component History

Product First Available:Tuesday, October 26, 2021
Stock Last Updated:09:21 pm
Tuesday, November 30, 2021
Specification Last Updated:Tuesday, November 30, 2021

APC / Barcodes

APC (Accu Product Code):SHKCR-No.8-170-A2
EAN13 (International Article No.):5054328500235
ASIN (Amazon Stock Identification No.):ASIN not defined.