The Tip,sealant Injection, cataloged under National Stock Number 4940-01-041-2272, is classified within Federal Supply Class 4940 (Miscellaneous Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Southwest Machine & Manufacturing Company, Inc.. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4940-01-041-2272 |
| Primary Part Number | 16A46021-1 |
| Item Name | Tip,sealant Injection |
| FSC / FSG | 4940 / 49 — Miscellaneous Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Southwest Machine & Manufacturing Company, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | 90 DEGREE CLOSE COUPLING SEALANT INJECTION TIP; 9/16 IN. DIA.,1 1/8 IN. H; WGHT 0.500 LB LBS |
| Reference Data and Literature | SERD NO. 46021 |
| Functional Description | USED TO APPLY SEALANT TO THE F-16 WING INTAGRAL FUEL TANKS IN THE EVENT OF MINOR FUEL LEAKS; USED WITH INJECTION SEALANT GUN (NSN 5120-00-677-7439) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 16A46021-1 PRIMARY | Southwest Machine & Manufacturing Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4940PL0808454 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 16A46021 | D/9 Drawing number reference only U.S. Government activity |
| 16A46021-1 | 5/9 Secondary reference U.S. Government activity |
NSN 4940-01-041-2272 is a Tip,sealant Injection, manufactured by Southwest Machine & Manufacturing Company, Inc., classified under FSC 4940, Miscellaneous Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4940-01-041-2272 has 1 manufacturer part number on file: 16A46021-1 (Southwest Machine & Manufacturing Company, Inc.).
Key specifications for 16A46021-1: General Characteristics Item Description: 90 DEGREE CLOSE COUPLING SEALANT INJECTION TIP; 9/16 IN. DIA.,1 1/8 IN. H; WGHT 0.500 LB LBS; Reference Data and Literature: SERD NO. 46021; Functional Description: USED TO APPLY SEALANT TO THE F-16 WING INTAGRAL FUEL TANKS IN THE EVENT OF MINOR FUEL LEAKS; USED WITH INJECTION SEALANT GUN (NSN 5120-00-677-7439); End Item Identification: AIRCRAFT; F-16A/B/C/D A. 3 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.