M4 x 0.70p Metric Coarse Stainless A2-70 G304 Button Post Hex (2.5mm) Security Machine Screws
$5.00
In stock
SKU
22BPHS4_configurable
- Button Post Hex Security Machine Screws have a low profile head and a small metal post (pin) in the middle of the screw head that prevents a normal hex driver from engaging
- The head is button style that features a medium dome and a flat underside designed to provide maximum holding power on flat surfaces. The drive is called post (pin) hex, a small metal post in the middle of the screw head that prevents a normal allen key from engaging. Post (pin) hex screws can only be installed with the correct security bit or key. Designed for medium torque applications. Used to fasten components together by means of through holes and securing with a nut at the other end or screwed into a tapped hole with the matching thread
- Also known as: Tamper Resistance Screws, Post Pin Screws, Dome Head Torx Screws, Pin Head Machine Screw
- Material / Coating: Stainless Steel A2-70 G304 is the most popular grade of stainless steel. It is aesthetically pleasing to the eye and very practical because of its excellent corrosion protection in most environments. Most products can be identified by the following markings: A2, A2-70, 304 or G304. Stainless steels are largely non-magnetic but it is common for stainless steel fasteners to show a small degree of magnetism which is a result of work-hardening during the manufacturing process
- Can Stainless corrode?: Stainless steel is corrosion-resistant but not corrosion-proof and corrosion can occur if the material is installed or handled incorrectly. The use of tools and drills made from conventional steel during the installation of stainless steel fasteners may also lead to problems. Even the hardest of tools can produce debris that leaves minute steel particles on the stainless steel fastener surfaces or in pre-drilled holes. It is these particles that often rust when exposed to moisture or oxygen and can result in a stained or tarnished finish to the stainless steel material
- Thread Pitch (Metric): Pitch means the distance between the peaks of two threads along a screw, bolt, or fastener expressed in millimetres (mm). Used when referring to Metric parts. For example, a thread pitch of 1.50mm means that the distance between one thread and the next is 1.50mm
- Fastener length: is generally measured from the point where the surface of the material will be when the fastener is installed to the end of the fastener. Thus, fasteners with heads that sit above the surface are measured from under the head to the end of the fastener, while fasteners that sit flush with the surface are measured from the top of the head to the end of the fastener
- Driver Bits: A large range of suitable driver bits are in the " Driving" section of our website
- Measurements: Every effort has been made to ensure all measurements on our site are accurate and to the relevant standard, they should only be used as a guide. If you see a problem with our specifications please contact us
- Dimensions: Our stock is sourced from various suppliers, therefore differences may exist between batches such as height, width, visible stamped markings, appearance or actual finish
- Dimensions: Our stock is sourced from various suppliers, therefore differences may exist between batches such as height, width, visible stamped markings, appearance or actual finish
- Photos: Are of the product but may not be the actual diameter, head size or length you require, always refer to the size in the description and additional specifications data provided prior to ordering
- Disclaimer: Technical data and specifications were researched and compiled from numerous industry sources for the sole purpose of providing basic information. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person, and Bolt and Nut Australia is not responsible for any loss, claim or damages arising therefrom. In developing this information, Bolt and Nut Australia has made a determined effort to present it accurately
- Updating our site: If you see any problems with any of our specifications or you require additional information please contact us
- Buy with confidence: ⇒ 10+ years experience selling online, > 19,000 stock lines, > 80 million pieces ex stock in Brisbane QLD
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| System of Measurement | Metric |
|---|---|
| Product | Security Machine Screw |
| Head Type | Button Head |
| Size | M4 (4mm) |
| Size & Thread Pitch | M4 x 0.70p Coarse |
| Thread Pitch | 0.70mm |
| Thread Direction | Right Hand |
| Thread Type | Metric - Coarse |
| Corrosion Protection Level | Excellent |
| Class / Grade | A2-70 G304 |
| Material | Stainless Steel |
| Length (l) | Select from the dropdown |
| Thread Length (t) | Full Thread |
| Product Diameter (d) | 3.83 - 3.97mm |
| Head Diameter (a) | 7.24 - 7.93mm |
| Head Height (h) | 2.10mm |
| Drive Size | 2.5mm |
| Drive Type | Post (Pin) Hex |
| Diameter in Imperial | 5/32" | 8-32 | 8-36 |
| Standard Made To | HEC Security / A2 |
| Brand | Hobson Engineering |
| Alternative Brands | Sentinel Fasteners |
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