Related Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASME B18.2.4.1M Metric Hex Nuts Style 1 Dimensions
Precision Regular-Height Metric Hex Nuts for Standard Metric Bolted Assemblies Across Industrial and Structural Applications.
ASME B18.2.4.1M Metric Hex Nuts Style 1 are metric-series regular hexagon internally threaded fasteners providing dimensional requirements in SI units for width across flats, width across corners, nut height, chamfer dimensions, and thread pitch specifications for the complete range of metric sizes — serving as the standard mating nut for ASME B18.2.3.1M metric hex cap screws, B18.2.3.5M metric hex bolts, and B18.31.1M metric clamping studs in North American-designed systems operating under metric fastener standards. The ASME B18.2.4.1M Style 1 dimensional reference ensures full interchangeability between metric hex nut suppliers across different manufacturing countries, which is essential for large international engineering projects and global maintenance programs sourcing metric fasteners from multiple vendors. When manufactured to ASTM A1082, the specification for high-strength stainless steel bolting material, these Style 1 metric hex nuts provide excellent corrosion resistance, non-magnetic properties, and maintained mechanical performance in aggressive service environments — making them the preferred choice for chemical processing plants, food and beverage facilities, marine structures, water treatment infrastructure, and pharmaceutical manufacturing buildings. Proper nut grade selection to match the bolt material specification is essential to achieving safe, reliable, and code-compliant bolted joint performance in all metric fastening applications. ASTM A1082 metric hex nuts are available with EN 10204 Type 3.1 material certification for traceable quality-assured supply.
ASME B18.2.4.1M Metric Hex Nut Style 1 Dimensions (mm)
| Nominal Dia. | S | E | M | Dw | C | Total Runout of Bearing Surface FIM | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Width Across Flats | Width Across Corners | Thickness | Bearing Face Dia | Washer Face Thickness | ||||||
| Max. | Min. | Max. | Min. | Max. | Min. | Min. | Max. | Min. | Max. | |
| M1.6 | 3.20 | 3.02 | 3.70 | 3.41 | 1.30 | 1.05 | 2.3 | ... | ... | ... |
| M2 | 4.00 | 3.82 | 4.62 | 4.32 | 1.60 | 1.35 | 3.1 | ... | ... | ... |
| M2.5 | 5.00 | 4.82 | 5.77 | 5.45 | 2.00 | 1.75 | 4.1 | ... | ... | ... |
| M3 | 5.50 | 5.32 | 6.35 | 6.01 | 2.40 | 2.15 | 4.6 | ... | ... | ... |
| M3.5 | 6.00 | 5.82 | 6.93 | 6.58 | 2.80 | 2.55 | 5.1 | ... | ... | ... |
| M4 | 7.00 | 6.78 | 8.08 | 7.66 | 3.20 | 2.90 | 6.0 | ... | ... | ... |
| M5 | 8.00 | 7.78 | 9.24 | 8.79 | 4.70 | 4.40 | 7.0 | ... | ... | 0.30 |
| M6 | 10.00 | 9.78 | 11.55 | 11.05 | 5.20 | 4.90 | 8.9 | ... | ... | 0.33 |
| M8 | 13.00 | 12.73 | 15.01 | 14.38 | 6.80 | 6.44 | 11.6 | ... | ... | 0.36 |
| M10 | 15.00 | 14.73 | 17.32 | 16.64 | 9.10 | 8.70 | 13.6 | ... | ... | 0.39 |
| M10 | 16.00 | 15.73 | 18.45 | 17.77 | 8.40 | 8.04 | 14.6 | ... | ... | 0.39 |
| M12 | 18.00 | 17.73 | 20.78 | 20.03 | 10.80 | 10.37 | 16.6 | ... | ... | 0.42 |
| M14 | 21.00 | 20.67 | 24.25 | 23.35 | 12.80 | 12.10 | 19.4 | ... | ... | 0.45 |
| M16 | 24.00 | 23.67 | 27.71 | 26.75 | 14.80 | 14.10 | 22.4 | ... | ... | 0.48 |
| M20 | 30.00 | 29.16 | 34.64 | 32.95 | 18.00 | 16.90 | 27.9 | 0.8 | 0.4 | 0.56 |
| M24 | 36.00 | 35.00 | 41.57 | 39.55 | 21.50 | 20.20 | 32.5 | 0.8 | 0.4 | 0.64 |
| M30 | 46.00 | 45.00 | 53.12 | 50.85 | 25.60 | 24.30 | 42.5 | 0.8 | 0.4 | 0.76 |
| M36 | 55.00 | 53.80 | 63.51 | 60.79 | 31.00 | 29.40 | 50.8 | 0.8 | 0.4 | 0.89 |
Frequently Asked Questions
What stainless steel grades does ASTM A1082 cover for din 934?
ASTM A1082 covers duplex grades (S31803/2205, S32205/2205, S32750/2507, S32760/Zeron 100, S39277/AL-6XN) and precipitation-hardening grades (S17400/17-4 PH, S17700/17-7 PH, S15700/15-7 PH, S35500/AM-355) - all available for this product family at TorqBolt.
What is the standard dimensional reference for these din 934?
This product follows ASME B18.2 4 1M, the dimensional standard for din 934 in stainless steel. Material chemistry, mechanical properties and heat treatment follow ASTM A1082/A1082M. TorqBolt supplies both inch-series and metric sizes per the applicable ASME or ISO drawing.
Are A1082 din 934 suitable for sour service (NACE MR0175)?
Yes, with hardness control. NACE MR0175 / ISO 15156 permits duplex grades S31803, S32205, S32750, S32760 at 28 HRC max for sour service. 17-4 PH (S17400) at H1150 condition (28 HRC) is the most common PH grade qualified for sour service. TorqBolt provides NACE-MR0175 compliant heat-treat reports.
What is the typical strength of A1082 super-duplex 2507 (S32750) din 934?
Super-duplex 2507 (S32750) per A1082: tensile 116 ksi (800 MPa) min, yield 80 ksi (550 MPa) min, elongation 15% min, 32 HRC max. PREN ≈ 42 - suitable for seawater, brine and chloride-rich pressure-vessel service. Higher strength than austenitic A193 B8M while offering pitting resistance well above 304/316.
References & Standards
- ASTM A1082 / A1082M - Standard Specification for High-Strength Precipitation-Hardening and Duplex Stainless Steel Bolting for Special-Purpose Applications (current edition 2016, active)
- ASTM A962 / A962M - General Requirements for Special-Purpose Bolting Materials
- ASTM A370 - Mechanical Testing of Steel Products
- NACE MR0175 / ISO 15156 - Sour-service hardness limits for petroleum & natural gas industries
- ASME B18 series - Dimensional standards for bolts, screws, nuts, studs
- ISO 4032 / 4033 / 4035 - Metric hexagon nut dimensional standards
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