Raychem 204W221-25-G03-0 is a straight moulded part with retention lip in fluid resistant modified elastomer. The G03 modification produces a smaller H recovery diameter (7.8mm vs 9.3mm on the standard variant), designed to lock against the smaller backshell groove on Deutsch ASU shell 03 connectors. For Deutsch ASL shell 6 and Souriau 8STA shell 4–6, use the standard 204W221-25-0 instead.
Raychem 204W221-25-G03-0 Specifications
| Property | Value |
|---|---|
| Moulded shape | Straight |
| Lipped | Yes |
| H — Big End diameter, as supplied | 11 mm |
| H — Big End diameter, after recovery | 7.8 mm |
| J — Small End (port) diameter, as supplied | 11 mm |
| J — Small End (port) diameter, after recovery | 1.9 mm |
| P — Total length, after recovery | 19 mm |
| R — Entry length, after recovery | 6.5 mm |
| Operating temperature | -75 °C to +150 °C |
| Adhesive pre-coat | No |
| Material | Fluid Resistant Modified Elastomer |
Note: this boot is not pre-glued. For a fully sealed system apply HellermannTyton V9500 Epoxy inside before fitting.
Compatible Connectors
- Deutsch ASU (Micro UltraLite) — shell 03, all variants
- Souriau 8STA — shell size 3 to 4
HellermannTyton Alternative
This product is a direct alternative to HellermannTyton 1037-4-G. Use case and dimensions are equivalent.









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