Specification combination and quantity distributionClearly label the total number of kits (e.g., 340pcs or 500pcs), break down the specific allocation of each screw by length (e.g., 6mm x 50pcs, 8mm x 70pcs, etc.), and indicate the M3 uniform thread specifications to avoid generalized descriptions of the mixed sizes.
Carbon steel material and hardness certificationIndicate the grade of carbon steel (e.g., 1008/1010) and compliance standards (e.g., ASTM A307/DIN 7981), provide surface hardness parameters (e.g., HRC 45-50) and zinc coating thickness (≥8μm), with salt spray test results (e.g., no red rust for 72 hours).
Cross recess and self-tapping designSpecify the cross slot specification (PH2/PHA2) and slot depth tolerance (±0.05mm), specify the thread type of the self-tapping end (e.g. type B/AB) and the lead angle (30°±2°), and specify the drilling capability (e.g. no pre-drilling of holes in 1.5mm-thick steel plates).
Applicable substrates and load limitationsList the suitable materials (e.g. PVC board, mild steel, pine), mark the maximum axial tension (e.g. M3 × 20mm ≥ 600N) and the recommended drilling diameter (1.8-2.0mm), indicating that it is not applicable to hardened steel or glass fiber reinforced plastics.
Sorting Packaging and Labeling DetailsDescribe the way of kit separation (e.g. individual sealed bag + compartmentalized plastic box), mark the printed content of each package size label (including length/quantity/ISO code), and explain the anti-mixing design (e.g. color ring marking or bag separator clips).
Description
Specification:
Material: carbon steel
Color: black
500 pcs, M3 screws, self-tapping, pan head, self-drilling, 6/8/10/12/16/18/20 mm, carbon steel
Size: M3*6
DIY use: Electricity
Model：M3 screws
Head type : Flat head
Screw type : Wood screws
Packing : 300-499 pieces
Material : Carbon steel
Nylon Black Hexagonal External Head Screw M3M4M5M6M8M10M12 Plastic Insulation Hexagonal Bolt(10mm,M4-20PCS)
SAR 60
Nylon M2 M2.5 M3 M4 M5 M6 M8 Black Round Head Screw Flat Head Plastic Cross Pan Head Cross Round Head Screw Bolt(15mm,M4-20PCS)
SAR 62
304 A2-70 Stainless Steel GB5787 Hexagonal Flange Cylindrical Head Screws Bolts with Serrated washers(10pcs M6,25mm)
SAR 71
GB12 and DIN603 304 Stainless Steel M6 M8 M10 M12 Round Head Square Neck Carriage Screw Carriage Bolt(30pcs M6,20mm)
SAR 102
