fittings › straight pipe to tube adapters
AN816-4-4
Steel Nipple
Description
Adapter
Specifications
| Connection Style | Flared (tube) 1st end, Plain (pipe) 2nd end |
|---|---|
| Connection Type | Flared, Threaded external pipe 2nd end, Threaded external tube 1st end |
| Dimension G | 0.563 in |
| Dimension G Tolerance | +0.004 in |
| Dimension M | 1.375 in |
| Dimension M Tolerance | +0.016 in |
| End Application | E-3a awacs 25f aircraft |
| Head Angle | 37 º |
| Industry Standards/Certification | AN816 |
| Material | Steel |
| NIIN | 00-289-0360 |
| NSN | 4730-00-289-0360 |
| Nominallength | 1.375 |
| Outside Diameter Tube Accommodated | 0.25 inches 1st end |
| Seat Angle | 37 degrees 1st end |
| Size No. Alum | 4-4D |
| Size No. Steel | 4-4 |
| Specification Data | 81343-as4842/1 professional/industrial association standard and 88044-an816 government standard and 81349-mil-f-5509 government specification |
| Thread Class | 3a 1st end |
| Thread P (AMPT) | 0.250 |
| Thread P (AMPT) Tolerance | +0.016 |
| Thread Series Designator | Nptf 2nd end, Unjf (fine thread with external controlled root radius) 1st end |
| Thread Size | 0.25 inches 2nd end, 0.437 inches 1st end, 1/4 |
| Thread T (Reference) | 0.4375-20 |
| Tube O.D. | 1/4 |
| Tube Outside Diameter | 1/4 in |
| Weight | 0.06 lb |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN816-4-4. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error