Leader-Fastener® is a manufacturer and distributor of DIN 979 Castle Nut. We have a complete line of service from having invested in production plants, export department and to having a quality control team and center to meet your requirements. We regard quality as the life of the company. We persist in good quality as the first policy and have established a set of quality control and inspection system according to the international standard. We have carried out ISO9001 Quality Guarantee System in every course of production, transportation and selling. We do hope we could be your partner in business by topping quality, knight service and competitive price in the near future and be your friends as well.
Metric Leader-Fastener® DIN 979 Castle Nut are hex nuts where slots are cut into one side of the nut (DIN 979 up to 12mm dia) or through the crown (>/= 12mm dia). These slots are designed to offer a locking feature where a split pin/cotter pin (DIN 94), R clip or safety wire can aligned through the slots and guided through a hole drilled in the shank of the mated bolt. They are similar to DIN 935 but are thinner making them ideal when there are space restrictions.
Material : Carbon steel, Stainless steel, Alloy Steel, Brass.
Finishment: Black, Zinc Plated, Zinc Yellow, HDG, Phosphate, DACROMET, Geomet, Magin, Ruspert, Teflon, etc.
Thread Size D |
M6 | (M7) | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | |
P | Pitch (Coarse thread) | 1 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | 2.5 | 2.5 |
Fine thread | - | - | 1 | 1 | 1.5 | 1.5 | 1.5 | 1.5 | 2 | 1.5 | |
Fine thread | - | - | - | 1.25 | 1.25 | - | - | 2 | 1.5 | 2 | |
de | max | - | - | - | - | 16 | 18 | 22 | 25 | 28 | 32 |
min | - | - | - | - | 15.57 | 17.57 | 21.48 | 24.3 | 27.3 | 31 | |
e | min | 11.05 | 12.12 | 14.38 | 17.77 | 20.03 | 23.35 | 26.75 | 29.56 | 32.95 | 37.29 |
k | max=nominal size | 5 | 5.5 | 6.5 | 8 | 10 | 11 | 13 | 15 | 16 | 18 |
min | 4.7 | 5.2 | 6.14 | 7.64 | 9.64 | 10.57 | 12.57 | 14.3 | 15.3 | 17.3 | |
w | max | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 7 | 9 | 10 | 10 |
min | 2.25 | 2.75 | 3.2 | 3.7 | 4.7 | 5.7 | 6.64 | 8.64 | 9.64 | 9.64 | |
n | max | 2.25 | 2.25 | 2.75 | 3.05 | 3.8 | 3.8 | 4.8 | 4.8 | 4.8 | 5.8 |
min | 2 | 2 | 2.5 | 2.8 | 3.5 | 3.5 | 4.5 | 4.5 | 4.5 | 5.5 | |
s | max=nominal size | 10 | 11 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 |
min | 9.78 | 10.73 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.16 | 29.16 | 33 |
Thread Size D |
M24 | (M27) | M30 | (M33) | M36 | (M39) | M42 | (M45) | M48 | (M52) | |
P | Pitch (Coarse thread) | 3 | 3 | 3.5 | 3.5 | 4 | 4 | 4.5 | 4.5 | 5 | 5 |
Fine thread | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | |
Fine thread | - | - | - | - | - | - | - | - | - | - | |
de | max | 34 | 38 | 42 | 46 | 50 | 55 | 58 | 62 | 65 | 70 |
min | 33 | 37 | 41 | 45 | 49 | 53.8 | 56.8 | 60.8 | 63.8 | 68.8 | |
e | min | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 71.3 | 76.95 | 82.6 | 88.25 |
k | max=nominal size | 19 | 22 | 24 | 26 | 29 | 31 | 33 | 34.5 | 36 | 38 |
min | 18.16 | 21.16 | 23.16 | 25.16 | 28.16 | 30 | 32 | 33.5 | 35 | 37 | |
w | max | 11 | 14 | 15 | 17 | 20 | 22 | 22 | 22.5 | 24 | 26 |
min | 10.57 | 13.57 | 14.57 | 16.57 | 19.48 | 21.48 | 21.48 | 22.02 | 23.48 | 25.48 | |
n | max | 5.8 | 5.8 | 7.36 | 7.36 | 7.36 | 7.36 | 9.36 | 9.36 | 9.36 | 9.36 |
min | 5.5 | 5.5 | 7 | 7 | 7 | 7 | 9 | 9 | 9 | 9 | |
s | max=nominal size | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
min | 35 | 40 | 45 | 49 | 53.8 | 58.8 | 63.1 | 68.1 | 73.1 | 78.1 |
①,Number of slots
d≤39mm: 6
d>39mm: 8
②,Material:
a) Steel, Strength class (material): d≤39mm: 04, 05; d>39mm: subject to agreement. Standard DIN EN ISO 898-2
b) Stainless steel, Strength class (material): d≤20mm: A2-035; 20mm<d≤39mm: A2-025; d>39mm: subject to agreement. Standard DIN EN ISO 3506-2
c) Non-ferrous, Strength class (material): CuZn, CU2 or CU3 at the discretion of the manufacturer. Standard DIN EN 28839