fittings › tube elbows
AN837-4D
45°; Elbow
Description
45°; Elbow
Specifications
| Alternate Part Number | AS1040D0404 |
|---|---|
| Connection Style | Flared (tube) all ends |
| Connection Type | Flared Tube, Threaded external tube all ends |
| Dimension M | 1 17/32 in |
| Dimension M Tolerance | +3/4 in |
| Dimension Q | 45/64 in |
| Dimension Q Tolerance | -0 in |
| Dimension V | 7/16 in |
| End Application | Aircraft application |
| Flow Angle | 45 degrees |
| Head Angle | 45 º |
| Industry Standards/Certification | AN837 |
| Leg Length | 0.703 inches 2nd end, 1.531 inches 1st end |
| Material | Aluminum |
| NIIN | 00-186-9996 |
| NSN | 4730-00-186-9996 |
| Outside Diameter Tube Accommodated | 0.250 inches all ends |
| Seat Angle | 37 degrees all ends |
| Size No. Alum | 4D |
| Size No. Stainless | 4J |
| Size No. Steel | 4 |
| Specification Data | 81343-as1040d0404 professional/industrial association standard |
| Surface Treatment | Anodize |
| Surface Treatment Specification | Type 2 military specification single treatment response inside mil-a-8625, Type 2 military specification single treatment response outside mil-a-8625 |
| Thread Class | 3a 1st end bulkhead, 3a all ends |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) 1st end bulkhead, Unjf (fine thread with external controlled root radius) all ends |
| Thread Size | 0.438 inches 1st end bulkhead, 0.438 inches all ends, 7/16-20 |
| Thread T (Reference) | 7/16-20 |
| Tube O.D. | 1/4 |
| Tube Outside Diameter | 1/4 in |
| Weight | 0.03 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN837-4D. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error