INCONEL 601 BOLTS - UNS N06601 / W.NR. 2.4851
■ ASME B18.2.1 Standard & Heavy Hex Bolt Dimensions (Inches)
| NOMINAL SIZE |
BODY DIA (Max) |
STANDARD HEX |
HEAVY HEX |
| WIDTH ACROSS FLATS |
HEAD HEIGHT |
WIDTH ACROSS FLATS |
HEAD HEIGHT |
| 1/4" |
0.260 |
7/16 |
11/64 |
- |
- |
| 3/8" |
0.388 |
9/16 |
1/4 |
- |
- |
| 1/2" |
0.515 |
3/4 |
11/32 |
7/8 |
5/16 |
| 5/8" |
0.642 |
15/16 |
27/64 |
1-1/16 |
25/64 |
| 3/4" |
0.768 |
1-1/8 |
1/2 |
1-1/4 |
15/32 |
| 1" |
1.022 |
1-1/2 |
43/64 |
1-5/8 |
39/64 |
| 1-1/4" |
1.277 |
- |
- |
2 |
25/32 |
Note: Heavy Hex Bolts are the mandated standard for high-temperature pressure vessels and massive pipe flanges to distribute load and prevent high-temperature flange embedment.
■ Metric DIN 933 Hexagon Head Cap Screw Dimensions (mm)
| NOMINAL THREAD (d) |
WIDTH ACROSS FLATS (s) |
WIDTH ACROSS CORNERS (e) |
HEAD HEIGHT (k) |
| M6 |
10.00 |
11.05 |
4.00 |
| M8 |
13.00 |
14.38 |
5.30 |
| M10 |
17.00 |
18.90 |
6.40 |
| M12 |
19.00 |
21.10 |
7.50 |
| M16 |
24.00 |
26.75 |
10.00 |
| M20 |
30.00 |
33.53 |
12.50 |
| M24 |
36.00 |
39.98 |
15.00 |
■ Bolt-Specific Technical Specifications
| Material |
Inconel 601 (Nickel-Chromium-Iron-Aluminum Solid-Solution Alloy) |
| Manufacturing Standards |
- ASTM F2281 (Type III, Class A) - High Temp Nickel Alloy Bolts
- ASTM B166 / ASME SB166 (Raw Bar/Wire Stock)
- ASTM B564 / ASME SB564 (Heavy Forgings)
|
| Mechanical Properties (Ambient) |
- Tensile Strength (Min): 550 MPa (80,000 psi)
- Yield Strength 0.2% Offset (Min): 205 MPa (30,000 psi)
- Elongation (Min): 30%
|
| Thermal & Oxidation Limits |
Maintains extreme resistance to oxidation and spalling up to 1250°C (2282°F) due to the addition of aluminum, which forms a highly tenacious chromia (Cr2O3) and alumina (Al2O3) bi-layer scale. |
| Installation & Galling Mitigation |
Extreme risk of cold-welding (galling) due to bare metal yielding. Dry assembly is strictly prohibited. High-temperature graphite, Molybdenum Disulfide (MoS2), or high-solids silver-based anti-seize must be utilized. Reduce installation velocity and use calibrated manual torque wrenches. |
