Project Overview
This project involves the long-term supply of ASTM F436 flat washers to a USA customer.
The cooperation has lasted for over 10 years, with stable orders and consistent quality requirements.
According to the proforma invoice, multiple sizes were supplied in this order, including:
• 3/4″ – 15,000 pcs
• 7/8″ – 12,000 pcs
• 1-1/2″ – 4,000 pcs
• 2″ – 2,000 pcs
Product Description
The product is ASTM F436 Type 1 flat washer, widely used in structural bolting applications.
Key features include:
• Heat-treated steel washers (38–45 HRC)
• High strength and load-bearing capacity
• Designed for structural and heavy-duty fastening
• Strict dimensional tolerance control
According to the drawing, all washers comply with ASTM F436 requirements for ID, OD, thickness, and concentricity.
Production & Quality Control
This project requires strict quality consistency due to long-term cooperation.
We ensure:
• Stable raw material sourcing
• Controlled heat treatment process
• Strict dimensional inspection
• Surface quality control (no burrs, no defects)
All products are manufactured according to customer drawings and ASTM standards.
Project Highlights
• Over 10 years long-term cooperation
• Stable monthly / repeat orders
• Multiple sizes with consistent quality
• Trusted by USA industrial customer
👉 This project demonstrates our capability in long-term OEM supply and quality consistency
Application
F436 washers are commonly used in:
• Structural steel connections
• Construction and infrastructure
• Heavy equipment assembly
• High-strength bolting systems
Our service page:
Custom Washers, Bolts, Pins and Chain Components
Reference blog:
ASTM F436 Flat Washers: Specifications, Materials and Applications
👉Looking for a reliable washer supplier for long-term cooperation?
Send us your drawing or specification — we support stable OEM supply.
