fittings › tube reducers
AN919-4D
AN Fitting AN919-4D Reducer
Description
Reducer
Specifications
| Alternate Item Number | AS5174D0602 1/ |
|---|---|
| Alternate Part Number | AS5174D0602 |
| Connection Style | Flared w/ gasket seal (boss) all ends |
| Connection Type | Flare Type, Threaded external boss all ends |
| Dimension E | 0.813 in |
| Dimension S | 5/8 in |
| Dimension W | 1 19/64 in |
| Flare Angle | 37 º |
| Industry Standards/Certification | AN919 |
| Material | Aluminum |
| Material Specification | Qq-q-225/4,t6 fed spec single material response |
| NIIN | 00-187-3578 |
| NSN | 4730-00-187-3578 |
| Nominallength | 1.297 |
| Size No. Alum | 4D |
| Size No. Steel | 4 |
| Surface Treatment | Anodize |
| Thread Class | 3a all ends |
| Thread Series Designator | Unf 2nd end, Unjf 1st end |
| Thread Size | 0.312 inches 2nd end, 0.562 inches 1st end |
| Thread T (Large End (Reference)) | 9/16-18 |
| Thread T (Small End (Reference)) | 5/16-24 |
| Tube O.D. | 3/8 1/8 |
| Tube Outside Diameter (Large End) | 3/8 in |
| Tube Outside Diameter (Small End) | 1/8 in |
| Weight | .005 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for AN919-4D — functionally equivalent.
- AS5174D0602 Listed alternate 5/16 in · Aluminum
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Catalog data updated 2026-07-05. Report a data error