ScrewSource
Product photography of the screw & washer assemblies family. Item shown is a catalog representative; exact specification is confirmed with your quotation.
Pan Head Machine Screw & Washer Assemblies (PWM Series) — Black Oxide
Pan head machine screw-and-washer assemblies — pre-fitted washers over tapped joints.
MOQ depends on specification — contact us · Quotation based on quantity and specification. Every inquiry is answered by a person.
Specifications
| Series code | PWM series |
|---|---|
| Material | Carbon Steel |
| Finish | Black Oxide |
| Head type | Pan + Washer |
| Drive | Cross recess (Phillips) |
| Thread | Machine thread |
| Size range | Available sizes on request — depends on specification |
| Packaging | standard export packing — details with quotation |
| MOQ | MOQ depends on specification — contact us |
| Lead time | Depends on stock status and sourcing route — confirmed with your quotation |
Applications
- High-volume lines with tapped holes
- Electronics and appliance assembly
- Workstations reducing parts handling
Technical notes
Machine thread for pre-tapped seats, with the load-spreading washer pre-fitted — one part, one operation.
Pan Head Machine Screw & Washer Assemblies (PWM Series) — Black Oxide — FAQ
Machine thread or self-tapping?
These run into pre-tapped holes. For one-step assembly without tapping, see the self-tapping washer assemblies (PWA series).
Related products
Pan Head Self-Tapping Screw & Washer Assemblies (PWA Series) — Black Oxide
Pan head self-tapping screw-and-washer assemblies — one-step tapping assembly with captive washers.
Pan Head Self-Tapping Screw & Washer Assemblies (PWA Series) — Nickel Plated
Pan head self-tapping screw-and-washer assemblies — one-step tapping assembly with captive washers.
Pan Head Machine Screw & Washer Assemblies (PWB Series) — Black Oxide
Pan head machine screw-and-washer assemblies — pre-fitted washers over tapped joints.
Pan Head Machine Screw & Washer Assemblies (PWB Series) — Nickel Plated
Pan head machine screw-and-washer assemblies — pre-fitted washers over tapped joints.
Related guides
Metric Screw Sizes & Thread Pitches (M2–M12 Quick Reference)
A plain table of the ISO metric coarse and fine pitches you will actually meet in small fasteners — plus tapping drill sizes, how to read an M-size callout, and the traps that cause wrong-thread orders.
Read →Self-Tapping vs Machine Screws: What's the Difference?
The thread decides everything — how each screw type grips, where each belongs, and why getting this one detail right saves the most rework.
Read →304 Stainless vs Carbon Steel Screws: Which Should You Buy?
Corrosion resistance, strength, appearance and price — a practical way to choose between stainless and plated carbon steel screws for your application.
Read →Understanding Screw Head Types — Pan, Flat, Socket Cap & More
Head geometry decides how a screw sits, spreads load and looks after assembly — a field guide to the head types in our catalog and when to use each.
Read →Request a quote
Pan Head Machine Screw & Washer Assemblies (PWM Series) — Black Oxide
Send your sizes and requirements — quotation based on quantity and specification, with this category's context attached.
ScrewSource — ScrewSource is a China fastener sourcing & supply partner — a focused catalog of 30+ screw SKUs, backed by a physical fastener business and a network of domestic screw suppliers.