A fastener inspection report should not be treated as a formality. Before accepting an order, buyers need to check whether the report actually matches the goods, the purchase order, and the project requirement.

Many delivery disputes start with one simple problem: the report looks complete, but the batch number, size, grade, coating, or test item does not match the shipped fasteners.

The report must prove the order is correct. It should not just fill a document folder.

Start With Product Identification

Match the Report to the Purchase Order

The first page should identify the product clearly. Check the report against the PO, drawing, invoice, and packing list.

For common industrial items, buyers can compare 标准紧固件 before confirming the inspection scope.

Check Dimensional Inspection

Size and Thread Fit Matter First

Dimensional inspection should cover more than overall length. For fasteners, thread fit is often where problems appear.

Key items include:

• 直径
• 长度
• 螺距
• 螺纹长度
• 头部尺寸
• 对边宽度
• 垫圈内径、外径和厚度
• Nut height and thread engagement

For bolt and washer assemblies, buyers can review 螺栓产品 和 洗涤产品 when checking matched sets.

If the report does not include thread gauge results, ask for clarification before accepting the order.

Review Mechanical Test Results

Do Not Accept Grade Claims Without Data

For load-bearing fasteners, the report should include mechanical properties. These may include hardness, tensile strength, proof load, yield strength, or wedge tensile testing, depending on the standard.

对于 高强度紧固件, mechanical testing should match the stated grade and batch.

Check Coating Reports

Coating Affects Corrosion and Assembly

Surface finish is not only visual. Coating thickness can affect corrosion resistance, thread fit, and tightening behavior.

对于 涂层紧固件, check:

1. 涂层类型
2. 涂层厚度
3. Salt spray requirement, if specified
4. Adhesion or visual condition
5. 高强度电镀件烘烤记录
6. Batch number linked to the coating report

A zinc plated report should not be used for a hot-dip galvanized shipment. A coating report without batch traceability has limited value.

Verify Material Certificates

材料测试证书

The MTC should show material grade, heat number, chemical composition, and sometimes mechanical properties. For stainless steel or special alloy orders, PMI may also be required.

Check whether the heat number on the MTC matches the production batch. If the fastener is custom-made, the drawing revision should also be listed.

对于基于绘图的产品，请使用 定制非标紧固件 and request a dimensional report against the approved drawing.

Check Packing and Traceability

Inspection reports should match physical shipment labels.

Before accepting an order, confirm:

• 纸箱标签与装箱单相符
• 批号与检测报告相符
• Quantity matches the PO
• Mixed sizes are clearly separated
• 证书已签名并注明日期
• Report units are correct: mm, inch, MPa, HRC, kg, or pcs

For full shipment planning, buyers can review the complete 紧固件产品 range and define inspection requirements by product type.

最终建议

A fastener inspection report should answer three questions: what was tested, which batch was tested, and whether the results meet the order requirement.

Before accepting an order, check product identity, dimensions, thread fit, mechanical properties, coating, material certificate, and traceability. If the report does not match the goods, do not approve shipment until the supplier explains and corrects it.