Hex washer head screws are the standard fastener for a wide range of assembly and maintenance tasks in automotive and marine environments — equipment mounting, panel attachment, license plate hardware, and shop fixture assembly among them. Running out of common fasteners mid-job is a preventable inconvenience. The 100-pack format provides a working stock at a unit cost well below what individual or small-pack fasteners cost at a hardware store.
The Metric Hex Washer Head Screw — 100-Pack provides a professional supply quantity of metric-thread fasteners with an integrated hex-drive washer head. The washer head design concentrates clamping force over a wider area than a standard screw head, preventing material deformation on softer substrates while requiring only a hex driver or socket for installation — no separate washer needed. The 100-pack format matches the purchasing pattern of shops and mobile operations that use these fasteners across multiple applications.
What These Screws Are
These are metric hex washer head screws — fasteners with a metric thread pitch, a hexagonal drive head, and an integrated wide-flange washer built into the head profile. The hex drive allows installation with a hex socket, nut driver, or compatible bit driver without requiring a separate washer under the head. The integrated washer head is the differentiating design element over a standard hex head screw.
Key Features and Why They Matter
- Integrated washer head design — wider bearing surface than standard screw heads. Means reduced risk of pull-through on soft materials and more even clamping load distribution on thin panels and plastic mounts.
- Hex drive — drives with a socket, hex bit, or nut driver. Means fast installation with common tools — no special driver required.
- Metric thread — matches the metric fastener standard common on import vehicles, marine equipment, and detailing machinery. Means correct thread compatibility for metric applications without hunting for imperial alternatives.
- 100-pack supply format — working inventory for shops, mobile operators, and fleet facilities. Lower per-unit cost than small retail packs and eliminates constant restocking of a commonly used fastener.
- General-purpose construction — suitable for equipment mounting, panel attachment, and maintenance assembly in automotive and marine environments.
What These Screws Are NOT For
Verify the screw size (thread diameter, pitch, and length) matches your application before use. Metric fasteners are not interchangeable with SAE/imperial threads of similar size. Do not use in structural load-bearing applications without engineering confirmation that the fastener specifications meet the load requirements. For license plate mounting hardware specifically, see the license plate hardware category.
Who Uses These
Mobile detail operators assembling and maintaining their equipment, fleet maintenance shops doing recurring vehicle component work, shop owners maintaining equipment fixtures and storage systems, and marine facilities handling metric-standard assembly work on import boat hardware. Any operation that regularly uses metric hex washer head screws will benefit from stocking the 100-pack over purchasing small quantities at hardware store rates.
How to Use
- Confirm thread compatibility: Match the metric size to your application — thread diameter, pitch, and screw length all matter.
- Select the correct driver: Use a hex socket, nut driver, or hex bit that matches the hex head size of the screw.
- Drive to appropriate torque: The integrated washer head distributes load — do not overtighten on soft materials. Hand-tight plus a quarter turn is typically sufficient for panel attachment on plastic mounts.
- Inspect: Confirm the washer head is fully seated and flush without surface deformation at the contact area.
Why Buy 100-Pack vs. Small Retail Packs
Small fastener packs from hardware stores cost significantly more per screw than bulk professional packs. For operations using metric hex washer head screws across multiple applications — equipment assembly, panel work, routine maintenance — stocking the 100-pack reduces both cost per fastener and the frequency of runs to a hardware store for commonly needed sizes. Having an on-hand supply also prevents the workflow interruption of running out of a common fastener mid-job.
Frequently Asked Questions
What size are these screws?
Check the product label or contact Polishing Systems Inc for the specific thread diameter, pitch, and length included in this package. Metric fasteners are identified by M-size designation (e.g., M5, M6, M8) and thread pitch. Confirm the size matches your application before ordering.
What material are these screws?
Confirm the material specification from the product documentation or by contacting PSI. For applications exposed to moisture or marine environments, verify whether stainless steel or zinc-plated options are available and appropriate for the corrosion exposure of your application.
Are these appropriate for license plate mounting?
License plate screws have specific thread requirements depending on vehicle make and model. Verify thread size compatibility with your vehicle specification before using any fastener for license plate mounting. See the license plate hardware category for screws specifically designated for that application.
Can I use a power drill to install these?
Yes — a cordless drill or impact driver with the correct hex bit drives these screws efficiently. Use a lower torque setting on a clutched driver to avoid overtightening, particularly on plastic panels and soft mounting materials.
How do I store the 100-pack to keep screws organized?
A small parts organizer bin or labeled drawer in a parts cabinet is the standard storage approach. Label clearly by size if you stock multiple metric fastener sizes to avoid mis-installation in the field.
