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12 point flange nuts are fastening components of high performance designed to be used where high torque control, tool access and high strength clamping is needed. Compared to regular hex nuts, these nuts have a 12-point (bi-hex) design with an inbuilt flange that evenly distributes the load and removes the need to have a separate washer.
Commonly applicable in automotive, aerospace, heavy machinery and structural engineering, 12 point flange nuts are suitable in high-vibration and high-load applications.Their small size enables them to get into tight spaces, and the flange provides a better load distribution and minimizes surface damage.
Knowledge of the weight chart, dimensions and specifications of 12 point flange nuts is very important to the engineers, procurement teams, and manufacturers. Correct weight information assists in estimating materials, inventory and calculating costs, particularly when the production is large-scale.
What Are 12 Point Flange Nuts?
12 point flange nuts are bolts having an external profile of 12 sides and an inner washer-like flange at the bottom. The 12-point design permits finer angular engagement (30° vs 60° in hex nuts), and is easier to install in tight spaces.
Key Features:
- Better tool grip design of 12 points.
- Combined flange to distribute the load.
- No need to have a separate washer.
- Applicable to high torque applications.
- Fits well in small or narrow areas.
12 Point Flange Nuts Weight Chart (Metric – Approx. kg per 1000 pcs)
12 Point flange nuts Weight Chart feature a 12 Point internal drive for high torque and an integrated washer flange for load distribution. Weights approximate for carbon steel Grade 8/8.8.
| Thread Size | Pitch | Flange Ø (D) | Height (H) | Weight (kg/1000 pcs) |
| M6 | 1.0 | 12.0 | 5.0 | 2.80 |
| M8 | 1.25 | 17.0 | 6.5 | 6.10 |
| M10 | 1.5 | 21.0 | 8.0 | 11.20 |
| M12 | 1.75 | 24.0 | 10.0 | 17.80 |
| M16 | 2.0 | 30.0 | 13.0 | 36.50 |
| M20 | 2.5 | 39.0 | 16.0 | 68.00 |
| M24 | 3.0 | 46.0 | 19.0 | 115.00 |
| M30 | 3.5 | 60.0 | 24.0 | 225.00 |
12-Point Nuts Specification
| Product name | 12-Point Nuts |
| Place of Origin | India |
| 12-Point Nuts Size | M2-M60, UNC:1/4”-4” |
| 12-Point Nuts Length | 6mm-500mm |
| Specialized manufacturer of | Din934 Hex nut, DIN6923 Flange hex nut, DIN985 Nylon lock nut, DIN1587 Cup nut, DIN315 Wing nut, Main products are Stainless steel bolts and nuts, SS 304 bolts and nuts, 304 Nuts and bolts, 304 bolt nut, 304 nut bolt, 316 Bolts and nuts, 316 hex nuts, 316S31 bolts and nuts. |
| Standard | DIN934 DIN936 DIN439 DIN555 A194 2H ASTM A563 |
| Grade | 4, 8, 10, AISI 2, AISI 5, AISI 8 |
| 12-Point Nuts Application | Wind tower, Nuclear power, Railway, Automotive industry, Construction, Electronic industry |
| 12-Point Nuts Material | 18-8 Stainless Steel, Stainless steel 201, stainless steel ss 304/ SS316 A2/A4, SS201, SS303, SS304, SS316, SS316L, SS904L, A2-70; A4-70; A4-80 |
| Thread Requirements | ASME B1.1, UNC & UNF, Class 2A (Fastenal will inspect and accept parts with a 1A no-go gauge) |
| Finish | Per ASTM A380/A380M |
| Finishing | Zinc Plated (Yellow, White, Blue, Black), Hop Dip Galvanized (HDG) phosphorization, Black Oxide, Geomet, Dacroment, anodization, Nickel plated, Zinc-Nickel plated, Brass Plated, Tin Plated, Black Plated, Copper Plated, Gold Plated, Salt fog test |
| Stock Products | Stainless steel: All DIN, GB Standard and part ANSI standard 12-Point Nuts, Example: ISO7380, DIN7981, DIN7982, DIN916, DIN913, DIN7985, DIN912 |
| Production technology | Cold Forged |
| Manufacturing Process | Wire Drawing, Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing |
| MOQ | 10 pieces |
| Delivery time | Regular product is about 7-15 days, custom product will according to special requirement |
| Others | OEM, ODM, ±0.03MM tolerance |
| Surface treatment of 12-Point Nuts | PassivationPolishAnodizingSand blastingElectroplating (color, blue, white, black zinc, Ni, Cr, tin, copper, silver)Black oxide coatingHeat-disposingHot-dip galvanizingRust preventive oil |
| 12-Point Nuts Specifications | SAE J995 Mechanical and material requirements for steel 12-Point Nuts.ASTM A194 Carbon and alloy steel 12-Point Nuts for bolts for high pressure and high temperature serviceASTM A563 Standard specification for carbon and alloy steel 12-Point NutsASTM F594 12-Point Nuts |
| Coatings | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
| Tolerance of 12-Point Stainless Steel Nuts | +/-0.01mm to +/-0.05mm |
| Samples | Yes |
| Production Capacity | 2,700,000 pieces per month |
| Payment Terms | T/T, Paypal, Western Union, L/C or Trade Assurance 30% deposit & balance before shipping |
| Specialized in | SS Hex Finished Nuts ~ Hex Jam Nuts ~ Heavy Hex Nut ~ Hex Machine Screw Nuts ~ Stainless Steel Lock Nuts ~ Nylon Insert Lock Nuts ~ Serrated Flange Lock Nuts ~ Acorn Nuts ~ Cap Nuts Stainless Steel ~ T Nuts ~ Hex Rod Coupling Nuts ~ Wing Nuts ~ Square Nuts |
12-Point Stainless Steel Nuts Dimensions
| D | L max | C min | W max | H max | P min | T min |
| 3/8″ | 0.6490 | 0.4910 | 0.4390 | 0.3500 | 0.1480 | 0.0640 |
| 1/2″ | 0.8280 | 0.6310 | 0.5640 | 0.5060 | 0.2390 | 0.0990 |
| 5/8″ | 1.0500 | 0.8460 | 0.7520 | 0.5860 | 0.3080 | 0.0990 |
| 3/4″ | 1.2300 | 0.9870 | 0.8770 | 0.7060 | 0.3780 | 0.1240 |
| 1.” | 1.6250 | 1.2710 | 1.1270 | 0.9700 | 0.5160 | 0.1770 |
| 1.1/4″ | 2.1250 | 1.6280 | 1.4400 | 1.2600 | 0.6810 | 0.2170 |
| 1.1/2″ | 2.5000 | 1.9140 | 1.6900 | 1.6100 | 0.8970 | 0.2970 |
| 1.3/4″ | 2.8150 | 2.3390 | 2.0640 | 2.1200 | 0.8300 | 0.3300 |
| 2.” | 3.1600 | 2.6970 | 2.3770 | 2.3500 | 1.0450 | 0.3890 |
| 2.1/4″ | 3.6960 | 3.0530 | 2.6900 | 2.7340 | 1.4090 | 0.4000 |
| 2.1/2″ | 4.0600 | 3.3380 | 2.9400 | 3.0380 | 1.6100 | 0.4250 |
How to Calculate 12 Point Flange Nut Weight
Formula:
Weight = Volume × Density
Where density of steel ≈ 7850 kg/m³
A 12 point flange nut can be approximated as:
- A cylindrical body
- Plus flange disc
- Minus threaded hole
Example (M10):
- Approx volume ≈ 2.1 × 10⁻⁶ m³
- Weight ≈ 2.1 × 10⁻⁶ × 7850 ≈ 0.0165 kg
This matches the standard chart value.
Conclusion
The flange nuts are of 12 points, designed to be used in performance, precision and reliability in challenging applications. They have a unique design which combines the advantages of a multi-point grip and built-in flange, and is therefore suited to a high-strength and high-vibration setting.
The knowledge of the weight chart, dimensions, and material variations can facilitate proper planning, efficient control of inventories, and cost-effective production. The industries can obtain high-performance in fastening and long-term durability by choosing the right size and specification.
By adding some standardized data and best practices to your workflow, you will eventually see an increase in efficiency in the assembly process and quality-assured results across the board in all applications.