481 (M to F) Union
Certification Details
Flameproof Exd IIC Gb, 
II 2G.
Baseefa Certificate No. Baseefa11ATEX0155U.
IECEx Certificate No. IECEx BAS 11.0077U.
GOST R certified.
Operating Temperature Range -60°C to +80°C.
Group II.
General Information
Manufactured in Brass, Nickel Plated Brass, Steel, Nickel Plated Steel and Stainless Steel.
M16 to M75 as standard.
Other parallel thread options available on request, including BSPP, PG, ET and NPSM.
NPT female threads can also be supplied in sizes ranging from ½" to 3".
Suitable for use in Zone 1 and Zone 2.
Construction and Test Standards: IEC/EN 60079-0 and IEC/EN 60079-1.
Ingress Protection: IP54.
| 481 UNION SELECTION TABLE | ||||||
|---|---|---|---|---|---|---|
| Male Thread Size | Thread Pitch | Female Thread Size | Thread Pitch | Thread Length | Across Flats | Across Corners |
| M16 | 1.5 | M16 | 1.5 | 16 | 30 | 32.5 |
| M20 | 1.5 | M20 | 1.5 | 16 | 36 | 39.5 |
| M25 | 1.5 | M25 | 1.5 | 16 | 46 | 50.5 |
| M32 | 1.5 | M32 | 1.5 | 16 | 46 | 50.5 |
| M40 | 1.5 | M40 | 1.5 | 16 | 55 | 60.5 |
| M50 | 1.5 | M50 | 1.5 | 16 | 80 | 88.0 |
| M63 | 1.5 | M63 | 1.5 | 16 | 80 | 88.0 |
| M75 | 1.5 | M75 | 1.5 | 16 | 95 | 104.0 |
| All dimensions in millimetres. Note: Different thread sizes and types are permitted at each end of the adaptor, a step of one thread size is permitted between the two threads. Where different thread types / sizes are supplied, the overall dimensions of the union may increase in size. |
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Ordering Information
Product Type/Thread Size/Pitch/Material/Finish
e.g.481/M32 Male x M32 Female/1.5 mm/Brass/Nickel Plated
