Quick Specs

What Buyers Should Know Before Sourcing DIN 7349 Heavy Duty Washers

DIN 7349 washers are not selected only by hole diameter. They are used when a joint needs a thicker washer body, wider bearing support, and better surface protection during tightening. When purchased with industrial bolts, the washer should be checked against bolt diameter, coating thickness, contact surface, and clamp load condition.

For bulk production, consistency becomes the real issue. Mixed sizes, burrs, uneven plating, and unclear labels can create trouble at receiving inspection or on the assembly line. XZ Fastener recommends confirming the drawing, material, finish, packing count, inspection plan, and lot traceability before mass production begins.

Common Purchasing Descriptions

For complete project purchasing, buyers can review related fastener products and request washers, bolts, nuts, and coated parts in one quotation package.

Detailed Specifications Table

Material and Grade Explanation

DIN 7349 washer material should be selected according to bolt strength, joint surface, and load condition. Carbon steel is commonly used for machinery, supports, and general steelwork. Alloy steel or controlled hardness may be requested when the washers are paired with stronger fasteners or used under higher clamp loads.

When washers are ordered with high-strength fasteners, the washer should not be treated as a low-risk accessory. Heavy burrs, poor flatness, or inconsistent hardness can affect installation quality even when the bolt and nut meet specification.

Surface Finish Selection Guide

Surface finish should be selected by storage condition, installation environment, and expected service exposure. Plain or black washers may need oil and moisture-resistant packing. Zinc plated washers provide a clean surface for many indoor assemblies. Hot dip galvanized washers are often used outdoors, but coating build-up around the hole should be checked.

For bulk projects where bolts, nuts, and washers need the same coating plan, XZ Fastener can coordinate DIN 7349 supply with related coated fasteners.

Manufacturing and Quality Control

Bulk washer manufacturing requires process stability from raw material preparation to final pallet labeling. XZ Fastener focuses on dimensional control, burr removal, surface finish consistency, and packing accuracy according to order requirement. For repeat production, keeping the same drawing, finish, carton weight, and label format helps buyers manage receiving inspection and warehouse storage.

1. Confirm DIN 7349 size list, drawing, material, finish, and total quantity.
2. Check raw material and hardness requirement before production starts.
3. Control inside diameter, outside diameter, thickness, flatness, and burr condition.
4. Inspect coating appearance and thickness when plating or galvanizing is required.
5. Pack by size, finish, and lot with clear carton and pallet labels.

For non-standard dimensions, kit packing, or special inspection, buyers can use XZ Fastener’s custom fasteners support before confirming a bulk production order.

Aplicaciones

DIN 7349 washers can be supplied together with other standard fasteners for buyers who need coordinated bulk replenishment.

How to Get a Faster Quotation

A clear bulk order RFQ helps the manufacturer confirm pricing, lead time, tooling status, and packing cost faster. The most useful information is the washer size list, material, finish, quantity per size, packaging method, and inspection documents.

• Send nominal washer sizes and quantity per size.
• State DIN 7349 or provide a drawing for custom dimensions.
• Confirm material, hardness requirement, and surface finish.
• List bag count, carton weight, pallet type, label content, and barcode requirement.
• Specify inspection reports, coating checks, and any third-party inspection need.

For bulk production planning, buyers can contact XZ Fastener with the size list and delivery schedule.

Preguntas frecuentes