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
High-Strength Hex Socket Cap Screws for Compact and Precision Fastening in Elevated Temperature Environments
ISO 4762 socket head cap screws are internally driven cylindrical head fasteners that deliver high clamping force within a compact installation envelope, making them the preferred choice where space constraints prevent the use of standard hexagon head bolts. The deep hex socket drive allows high torque application without fastener damage, essential in precision assemblies such as valve bodies, pump casings, turbine components, and instrumentation brackets operating at elevated temperatures. Manufactured from EN 10269 certified alloy and heat-resistant steels, these screws maintain tensile strength, hardness, and dimensional form even through prolonged thermal cycling and high-pressure service conditions. For applications where a hex head format is more suitable, ISO 4017 bolts offer a full-thread alternative within the same EN 10269 material range, while ISO 4032 nuts complete the bolting assembly wherever required.

| Thread (d) | Pa | bb ref. |
dk | da max. |
ds | ee, f min. |
lf max |
k | r min. |
sf | t min. |
v max. |
dw min |
w min. |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| max.c | max.d | min. | max. | min. | max. | min. | nom. | max. | min. | |||||||||||
| M1,6 | 0,35 | 15 | 3,00 | 3,14 | 2,86 | 2 | 1,60 | 1,46 | 1,733 | 0,34 | 1,60 | 1,46 | 0,1 | 1,5 | 1,58 | 1,52 | 0,7 | 0,16 | 2,72 | 0,55 |
| M2 | 0,4 | 16 | 3,80 | 3,98 | 3,62 | 2,6 | 2,00 | 1,86 | 1,733 | 0,51 | 2,00 | 1,86 | 0,1 | 1,5 | 1,58 | 1,52 | 1 | 0,2 | 3,48 | 0,55 |
| M2,5 | 0,45 | 17 | 4,50 | 4,68 | 4,32 | 3,1 | 2,50 | 2,36 | 2,303 | 0,51 | 2,50 | 2,36 | 0,1 | 2 | 2,08 | 2,02 | 1,1 | 0,25 | 4,18 | 0,85 |
| M3 | 0,5 | 18 | 5,50 | 5,68 | 5,32 | 3,6 | 3,00 | 2,86 | 2,873 | 0,51 | 3,00 | 2,86 | 0,1 | 2,5 | 2,58 | 2,52 | 1,3 | 0,3 | 5,07 | 1,15 |
| M4 | 0,7 | 20 | 7,00 | 7,22 | 6,78 | 4,7 | 4,00 | 3,82 | 3,443 | 0,6 | 4,00 | 3,82 | 0,2 | 3 | 3,08 | 3,02 | 2 | 0,4 | 6,53 | 1,4 |
| M5 | 0,8 | 22 | 8,50 | 8,72 | 8,28 | 5,7 | 5,00 | 4,82 | 4,583 | 0,6 | 5,00 | 4,82 | 0,2 | 4 | 4,095 | 4,020 | 2,5 | 0,5 | 8,03 | 1,9 |
| M6 | 1 | 24 | 10,00 | 10,22 | 9,78 | 6,8 | 6,00 | 5,82 | 5,723 | 0,68 | 6,00 | 5,7 | 0,25 | 5 | 5,14 | 5,02 | 3 | 0,6 | 9,38 | 2,3 |
| M8 | 1,25 | 28 | 13,00 | 13,27 | 12,73 | 9,2 | 8,00 | 7,78 | 6,863 | 1,02 | 8,00 | 7,64 | 0,4 | 6 | 6,14 | 6,02 | 4 | 0,8 | 12,33 | 3,3 |
| M10 | 1,5 | 32 | 16,00 | 16,27 | 15,73 | 11,2 | 10,00 | 9,78 | 9,149 | 1,02 | 10,00 | 9,64 | 0,4 | 8 | 8,175 | 8,025 | 5 | 1 | 15,33 | 4 |
| M12 | 1,75 | 36 | 18,00 | 18,27 | 17,73 | 13,7 | 12,00 | 11,73 | 11,429 | 1,45 | 12,00 | 11,57 | 0,6 | 10 | 10,175 | 10,025 | 6 | 1,2 | 17,23 | 4,8 |
| M14 | 2 | 40 | 21,00 | 21,33 | 20,67 | 15,7 | 14,00 | 13,73 | 13,716 | 1,45 | 14,00 | 13,57 | 0,6 | 12 | 12,212 | 12,032 | 7 | 1,4 | 20,17 | 5,8 |
| M16 | 2 | 44 | 24,00 | 24,33 | 23,67 | 17,7 | 16,00 | 15,73 | 15,996 | 1,45 | 16,00 | 15,57 | 0,6 | 14 | 14,212 | 14,032 | 8 | 1,6 | 23,17 | 6,8 |
| M20 | 2,5 | 52 | 30,00 | 30,33 | 29,67 | 22,4 | 20,00 | 19,67 | 19,437 | 2,04 | 20,00 | 19,48 | 0,8 | 17 | 17,23 | 17,05 | 10 | 2 | 28,87 | 8,6 |
| M24 | 3 | 60 | 36,00 | 36,39 | 35,61 | 26,4 | 24,00 | 23,67 | 21,734 | 2,04 | 24,00 | 23,48 | 0,8 | 19 | 19,275 | 19,065 | 12 | 2,4 | 34,81 | 10,4 |
| M30 | 3,5 | 72 | 45,00 | 45,39 | 44,61 | 33,4 | 30,00 | 29,67 | 25,154 | 2,89 | 30,00 | 29,48 | 1 | 22 | 22,275 | 22,065 | 15,5 | 3 | 43,61 | 13,1 |
| M36 | 4 | 84 | 54,00 | 54,46 | 53,54 | 39,4 | 36,00 | 35,61 | 30,854 | 2,89 | 36,00 | 35,38 | 1 | 27 | 27,275 | 27,065 | 19 | 3,6 | 52,54 | 15,3 |
| M42 | 4,5 | 96 | 63,00 | 63,46 | 62,54 | 45,6 | 42,00 | 41,61 | 36,571 | 3,06 | 42,00 | 41,38 | 1,2 | 32 | 32,33 | 32,08 | 24 | 4,2 | 61,34 | 16,3 |
| M48 | 5 | 108 | 72,00 | 72,46 | 71,54 | 52,6 | 48,00 | 47,61 | 41,131 | 3,91 | 48,00 | 47,38 | 1,6 | 36 | 36,33 | 36,08 | 28 | 4,8 | 70,34 | 17,5 |
| M56 | 5,5 | 124 | 84,00 | 84,54 | 83,46 | 63 | 56,00 | 55,54 | 46,831 | 5,95 | 56,00 | 55,26 | 2 | 41 | 41,33 | 41,08 | 34 | 5,6 | 82,26 | 19 |
| M64 | 6 | 140 | 96,00 | 96,54 | 95,46 | 71 | 64,00 | 63,54 | 52,531 | 5,95 | 64,00 | 63,26 | 2 | 46 | 46,33 | 46,08 | 38 | 6,4 | 94,26 | 22 |