Left Full Thread UNC 10.9 Grade Blue Zinc Plated DIN 6921Hex Flange Head Bolts
1. Product Description
Hex flange bolt is a one-piece forged bolt with a hex washer head. The washer head always in 2 types, serrated flange and smooth flange, the so called flat bearing surface. Hex flange bolts always made by medium carbon steel, alloy steel and stainless steel.
Metric series carbon steel hex flange bolts generally supplied in class 8.8, class 10.9 and class 12.9 as perDIN6921 and ISO standard. Surface treatment could be in black oxide, galvanizing, dacromate. Stainless steel hex flanged bolts also available in SS304 and SS316, Class A2-70 and A4-80.
Inch series as per ANSI B18.2.1 dimensions always supplied in Grade 5 and Grade 8 according to SAE standard in carbon steel and alloy steel. 18-8 stainless steel hex flanged screws also available.
DIN and ANSI standard hex flange bolts technical drawings, please click below related photos.
2. Specification
| d | | ds | s | dc | k | b | L | | |
| Nominal Diameter | Thread Pitch | Body Diameter | Width Across Flats | Flange Diameter | Head Height | Thread Length | Lengths Under the Head | | |
| (coarse) | Max. | Min. | Max. | Min. | Max. | Max. | Nominal | | |
| M6 | 1 | 6 | 5.82 | 10 | 9.78 | 14.2 | 6.6 | 18 | 10-60 |
| M8 | 1.25 | 8 | 7.78 | 13 | 12.73 | 18 | 8.1 | 22 | 12-80 |
| M10 | 1.5 | 10 | 9.78 | 15 | 14.73 | 22.3 | 9.2 | 26 | 16-80 |
| M12 | 1.75 | 12 | 11.73 | 16 | 15.73 | 26.6 | 11.5 | 30 | 25-120 |
| M14 | 2 | 14 | 13.73 | 18 | 17.73 | 30.5 | 12.8 | 34 | 30-120 |
| M16 | 2 | 16 | 15.73 | 21 | 20.67 | 35 | 14.4 | 38 | 40-120 |
| M20 | 2.5 | 20 | 19.67 | 27 | 26.67 | 43 | 17.1 | 46 | 40-120 |
| (Standards set by ISO 898-1 – International Standards Organization, DIN 6921) |
| Diameter | Hex Size | Flange Diameter | Bearing Diameter | Head Thickness | Flange Thickness |
| F | B | B1 | H | K |
| Nom | Max | Min | Max | Min |
| 1/4" | 3/8" | 0.56 | 0.48 | 0.28 | 0.04 |
| 5/16" | 1/2" | 0.68 | 0.6 | 0.32 | 0.05 |
| 3/8" | 9/16" | 0.81 | 0.73 | 0.39 | 0.06 |
| 7/16" | 5/8" | 0.93 | 0.85 | 0.46 | 0.07 |
| 1/2" | 3/4" | 1.07 | 0.98 | 0.51 | 0.08 |
| 9/16" | 13/16 | 1.19 | 1.1 | 0.57 | 0.09 |
| 5/8" | 15/16 | 1.33 | 1.23 | 0.62 | 0.1 |
| 3/4" | 1 1/8 | 1.59 | 1.47 | 0.73 | 0.11 |
3. Application
Hex Flange Screws are commonly called Frame Bolts because of their popularity in the trucking industry for use on assembly of truck frame rails. Hex Flange Screws are also used on pipe flange applications because the larger bearing area under the head helps ensure that the gasket is uniformly compressed to eliminate leaks. Hex Flange Screw can be used in any assembly that is currently using a hex cap screw and washer to eliminate the washer.
Earnest Machine Products line of Hex Flange Screws are made to the dimensions specified in the Industrial Fasteners Institute standard IFI -111. The head is manufactured with a full trimmed hex to prevent wrench slipping and rounding of the hex during installation or removal. The bearing faces are smooth to ensure uniform torque tension performance and that maximum clamp loads are achieved.
4. Advantages
1. Good after sales service. Any small problem happening will be solved at the most prompt time;
2. Many years of export experience;
3. Specifications list is available upon your request
4. Welcome to send enquiry, we will reply soon.
5. Prompt shipment with professional documents
6. Custom packing, with photo before shipment
7. High quality and competitive price.
5. More pictures
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Left Full Thread Hex Head Bolts UNC Blue Zinc Plated DIN 6921 10.9 Grade Images
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