fittings › straight pipe to boss adapters
AN816-4-4D
AN Fitting AN816-4-4D Nipple
Description
Adapter
Specifications
| Connection Style | Flared w/ gasket seal (boss) 2nd end, Plain (pipe) 1st end |
|---|---|
| Connection Type | Flared, Threaded external boss 2nd end, Threaded external pipe 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 | Grumman a-10 acft |
| Head Angle | 37 º |
| Industry Standards/Certification | AN816 |
| Material | Aluminum |
| NIIN | 00-187-0087 |
| NSN | 4730-00-187-0087 |
| Nominallength | 1.375 |
| Size No. Alum | 4-4D |
| Size No. Steel | 4-4 |
| Special Features | Center wrenching facility |
| Specification Data | 88044-an816 government standard and 81343-as4842/1 professional/industrial association standard |
| Surface Treatment | Anodize |
| Thread Class | 3a 2nd end |
| Thread P (AMPT) | 0.250 |
| Thread P (AMPT) Tolerance | +0.016 |
| Thread Series Designator | Anpt 1st end, Unjf (fine thread with external controlled root radius) 2nd end |
| Thread Size | 0.250 inches 1st end, 0.438 inches 2nd end, 1/4 |
| Thread T (Reference) | 0.4375-20 |
| Tube O.D. | 1/4 |
| Tube Outside Diameter | 1/4 in |
| Weight | 0.02 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- AN816-4-4D
- AN816-4-4J
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN816-4-4D. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error