Sealing types according to DIN - ISO ANSI - BS - JIS
FORM A
FORM A - Sealing by metal ring - DIN 3852-1/2
| FORM A : DIN 3852-1/2 | ||||||
| G | a | b | d1 | Nm | ||
| M10x1 | 1 | 8 | 20 | - | ||
| ISO 228 G1/4" | 1,5 | 12 | 25 | - | ||
FORM B
FORM B - Mechanical sealing
| FORM B : DIN 3852-2 ISO 1179-1 ISO 9974-1 | ||||||
| G | a | b | d1 | Nm | ||
| M12x1,5 | 1,5 | 12 | 18 | 40 | ||
| ISO 228 G1/8" | 1 | 8 | 15 | 25 | ||
| ISO 228 G1/4" | 1,5 | 12 | 20 | 60 | ||
FORM C
FORM C - Sealing by tread
| FORM C : DIN 3852-1/2 | ||||
| G | b | t | ||
| ISO 7/I - R1/8" | 5,5 | 8,5 | ||
| ISO 7/I - R1/4" | 8,5 | 12,5 | ||
| ISO 7/I - R3/8" | 8,5 | 12,5 | ||
| M10x1 | 5,5 | 10,0 | ||
| FORM C : ANSI/ASME B 1.20.1 | ||||
| G | b | t | ||
| 1/8" - 27 NPTF | - | 11,6 | ||
| 1/4" - 18 NPTF | - | 16,4 | ||
| 3/8" - 18 NPTF | - | 17,4 | ||
FORM E
FORM E - Sealing by fitted ring
| FORM E : DIN 3852-2 ISO 1179-1 ISO 9974-1 | |||||
| G | a | b | d1 | Nm | |
| M10x1 | 1 | 8 | 15 | 20 | |
| M12x1,5 | 1,5 | 12 | 18 | 40 | |
| M14x1,5 | 1,5 | 12 | 20 | 55 | |
| M16x1,5 | 1,5 | 12 | 23 | 70 | |
| ISO 228 G1/8" | 1 | 8 | 15 | 20 | |
| ISO 228 G1/4" | 1,5 | 12 | 20 | 55 | |
| ISO 228 G3/8" | 2 | 12 | 23 | 80 | |
Form F + BS 5200
Form F + BS 5200
Sealing by O-ring - Form F | Mechanical sealing - BS 5200 |
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| ISO 6149-1 | |||||||
| G | a | b | d1 | d2 | s | z | Nm |
| M8x1 | 1,6 | 10 | 14 | 9,1 | 1 | 12° | 10 |
| M10x1 | 1,6 | 10 | 16 | 11,1 | 1 | 12° | 20 |
| M14x1,5 | 2,4 | 11,5 | 21 | 15,8 | 1,5 | 15° | 45 |
| ISO 11926-1 | |||||||
| G | a | b | d1 | d2 | s | z | Nm |
| 7/16"-20 UNF | 2,4 | 11,5 | 21 | 12,4 | 1,6 | 12° | 20 |
| 1/2"-20 UNF | 2,4 | 11,5 | 23 | 14 | 1,6 | 12° | 25 |
| 9/16"-18 UNF | 2,5 | 12,7 | 25 | 15,7 | 1,6 | 12° | 35 |
| 3/4"-16 UNF | 2,5 | 14,3 | 30 | 20,6 | 2,4 | 15° | 70 |
| JIS 2351 | |||||||
| G | a | b | d1 | d2 | s | z | Nm |
| G 1/4" | 2,5 | 12 | / | 15,6 | / | 15° | 45 |













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