| Standard | Material Type&Grade | Normal Size | Length | Screw Thread | Ob | O0.2 | δ4 | ψ | Hardness | |
| (in.) | (MPa) | (MPa) | (%) | (%) | Hardness | |||||
| ANSI/ASME B 18.2.1 ANSI/ASME B 18.2.3.1M ANSI/ASME B 18.2.3.6M ANSI/ASME 18.31.1M ANSI/ASME 18.31.2 |
A193/A193M | B7 | ≤2-1/2(M64) | According to order |
ASME/ANSI B 1.1 ASME/ANSI B 1.13M |
≥860 | ≥725 | ≥16 | ≥50 | ≤HB321 |
| B7M | ≤2-1/2(M64) | ≥690 | ≥550 | ≥18 | ≤HB235 | |||||
| B16 | ≤2-1/2(M64) | ≥860 | ≥725 | ≤HB321 | ||||||
| B8/B8M(CL.1) | All diameters | ≥515 | ≥205 | ≥30 | ≥50 | ≤HB223 | ||||
| B8(CL.2) | ≤3/4(M20) | ≥860 | ≥690 | ≥12 | ≥35 | ≤HB321 | ||||
| 3/4~1(M20-M24) | ≥795 | ≥550 | ≥15 | |||||||
| B8M(CL.2) | ≤3/4(M20) | ≥760 | ≥655 | ≥15 | ≥45 | |||||
| 3/4~1(M20-M24) | ≥690 | ≥550 | ≥20 | |||||||
| ANSI/ASME B 18.2.1 ANSI/ASME B 18.2.3.1M ANSI/ASME B 18.2.3.6M ANSI/ASME 18.31.1M ANSI/ASME 18.31.2 |
A320/A320M | L7 | ≤2-1/2(M64) | ≥860 | ≥725 | ≥16 | ≥50 | - | ||
| L7M | ≤2-1/2(M64) | ≥690 | ≥550 | ≥18 | ≥50 | ≤HB235 | ||||
| B8(CL.2) | ≤3/4(M20) | ≥860 | ≥690 | 12 | 35 | ≤HB321 | ||||
| 3/4~1(M20-M24) | ≥795 | ≥550 | 15 | |||||||
| B8M(CL.2) | ≤3/4(M20) | ≥760 | ≥655 | 15 | 45 | |||||
| 3/4~1(M20-M24) | ≥690 | ≥550 | 20 | |||||||
| ANSI/ASME B 18.2.1 ANSI/ASME B 18.2.3.1M ANSI/ASME B 18.2.3.6M ANSI/ASME 18.31.1M ANSI/ASME 18.31.2 |
A540/A540M | B21(CL.5) | ≤2(M50) | ≥825 | ≥725 | ≥15 | ≥50 | HB241~HB285 | ||
| B21(CL.4) | ≤2(M50) | ≥930 | ≥825 | ≥13 | ≥45 | HB269~HB331 | ||||
| B21(CL.3) | ≤2(M50) | ≥1000 | ≥895 | ≥12 | ≥40 | HB293~HB352 | ||||
| B21(CL.2) | ≤2(M50) | ≥1070 | ≥965 | ≥11 | ≥40 | HB311~HB401 | ||||
| B21(CL.1) | ≤2(M50) | ≥1140 | ≥1035 | ≥10 | ≥35 | HB321~HB429 | ||||
| B23(CL.5) | ≤2(M50) | ≥825 | ≥725 | ≥15 | ≥50 | HB248~HB311 | ||||
| B23(CL.4) | ≤2(M50) | ≥930 | ≥825 | ≥13 | ≥45 | HB269~HB341 | ||||
| B23(CL.3) | ≤2(M50) | ≥1000 | ≥895 | ≥12 | ≥40 | HB293~HB363 | ||||
| B23(CL.2) | ≤2(M50) | ≥1070 | ≥965 | ≥11 | ≥40 | HB311~HB388 | ||||
| B23(CL.1) | ≤2(M50) | ≥1140 | ≥1035 | ≥10 | ≥35 | HB321~HB415 | ||||
professional fastener manufacturing enterprise with many years of production experience and technical strength.
Copyright © 2024.Letian Fasteners Co., Ltd All rights reserved.
