Flat head hexagon socket screw DIN7991
| Name | Bolt and Nut |
| Standard | DIN, ISO, BSW, JIS, ASME and ANSI, Non-standard, Custom Drawing. |
| Material | Carbon steel, Alloy steel, Stainless steel. Carbon Steel: Q195, Q235, 35K, 45K Stainless Steel: SS201, SS303, SS304, SS316,SS316L,SS904L,F593 Steel Grade: DIN: Gr.4.6, 4.8, 5.6, 5.8, 8.8, 10.9, 12.9; SAE: Gr.2,5,8; ASTM: 307A, 307B, A325, A394, A490, A449 etc. |
| Finishing | Zinc(Yellow, White, Blue, Black), Hop Dip Galvanized(HDG), Black Oxide, Geomet, Dacroment, anodization, Nickel plated, Zinc-Nickel plated Plain, Black, Zinc Plated, Yellow Zinc Plated, Hot DIP Galvanizing, Dacromet, Nickel Plated, Magni, Geomet, Brass Plated |
| Production Process | M2-M24:Cold Froging,M24-M100 Hot Forging, Machining and CNC for Customized fastener |
| Head Style | Hexagon, T Head, Eye, Flange, Round |
| Customized Products Lead time | Busy season:10-15days,Slack seaon:5-10days |
| R&D Capacity | OEM Own Brand ODM |
| Thread | Metric Coarse, Metric Fine, UNC, UNF, BSW, BSF. |
| Stock Products | Steel:4.8Grade DIN6923,8.8Grade 10.9Grade of GB5783 and GB5782 Stainless steel: All DIN Standard stainless steel Bolt |
| Class | DIN: Gr.4.6,4.8,5.6,5.8,8.8,10.9,12.9; SAE: Gr.2,5,8; ASTM: 307A,307B,A325,A394,A490,A449 etc. |
| Transport Package | 20-25kg Carton+900kg/Pallet |
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Samples for customer requirements customization |
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Products Description
The bolts include hex bolts, carriage bolts, hex socket bolts, flange bolts, flange bolts, square bolts, eye bolts, T bolts, and more. The ranges of product grades are 4.8,8.8,10.9, and 12.9m and Gr2, Gr5, and Gr8. Materials are available for carbon, stainless steel, and aluminum. The diameter is from 2 to 48mm or 1/8 to 2 inches and the length is from 10 to 300mm or 3/8 to 10 inches. The standard is according to DIN, ANSI/ASME, BS, GB, and JIS, and non-standard as customer’s request. The wide range choice of finishes, such as zinc plated(bright color or yellow color), hot dip galvanizing, chemical blackening, dacromet, plain, etc.
DIN7991 is a specification standard for flat head hexagon socket screws in German standards.
The characteristic of this type of screw is that its head is designed with a flat head (countersunk head), and it is installed and tightened using an Allen wrench. Its specifications usually include the diameter of the screw (such as M2, M3, M4, etc., representing the nominal diameter of the screw), length, thread specifications, material grade, surface treatment, etc.
Common materials include carbon steel, alloy steel, stainless steel, etc., with material grades such as A2-70, A4-70/80, 8.8, 10.9, etc. The surface treatment methods include washing and oxidation, blackening, environmentally friendly galvanizing, etc.
Different manufacturers may provide DIN7991 flat head hexagon socket screws of different specifications and sizes to meet the needs of various mechanical industry fasteners. For example, Shanghai Moxuan Industrial Fasteners Co., Ltd. directly sells stainless steel countersunk hexagon socket screws din7991 American flat head hexagon socket screws, with thread specifications of m1.5-m1002 # -3 inches, nominal length of 5mm-1000mm, material grades of a2-70, a4-70/80, 8.8, 10.9, etc., which can be subjected to surface treatments such as washing, oxidation, blackening, environmentally friendly galvanizing, etc. The products comply with German standards, national standards, American standards, international standards and other standard types, and can be customized for processing. In terms of price, the minimum batch quantity is 100 pieces, with a unit price of 0.05 yuan per piece.
In practical applications, selecting the appropriate flat head hexagon socket screw requires consideration of factors such as installation environment, connection strength requirements, and size matching.
