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.
For custom washers, fasteners, pins, and other metal components requiring stamping, heat treatment, hardness control, surface finishing, and dimensional inspection, explore our custom precision metal parts manufacturing capabilities.
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, repeat-order management, and consistent quality control. For projects involving custom fasteners, machined parts, castings, plastic components, rubber parts, surface treatments, or assembled products, explore our broader custom industrial parts manufacturing capabilities.
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.
