The Stiffener,aircraft, cataloged under National Stock Number 1560-01-481-4307, is classified within Federal Supply Class 1560 (Airframe Structural Components) of the Aircraft and Airframe Components group. The manufacturer of record is H.m. Dunn Company Inc Dba Nex-Tech Aerospace. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Stiffener,aircraft |
| FSC / FSG | 1560 — Airframe Structural Components (FSG 15) |
| Manufacturers | H.m. Dunn Company Inc Dba Nex-Tech Aerospace (CAGE 64666); Aerospace Engineering & Support Inc Div Aerospace Engineering and Support, Inc. (CAGE 1DA92); Aerospace & Commercial Technologies, Llc Dba Aerospace & Commercial Technologies Llc (CAGE 1XKR3); Progressive Inc Div Progressive Incorporated (CAGE 64900) |
| Parameter | Value |
|---|---|
| NSN | 1560-01-481-4307 |
| Primary Part Number | 16B6521-25 |
| Item Name | Stiffener,aircraft |
| FSC / FSG | 1560 / 15 — Airframe Structural Components |
| Manufacturer | H.m. Dunn Company Inc Dba Nex-Tech Aerospace |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 16B6521-25 | H.m. Dunn Company Inc Dba Nex-Tech Aerospace (USA) |
| 16B6521-25 | Aerospace Engineering & Support Inc Div Aerospace Engineering and Support, Inc. (USA) |
| 16B6521-25 | Aerospace & Commercial Technologies, Llc Dba Aerospace & Commercial Technologies Llc (USA) |
| 16B6521-25 | Progressive Inc Div Progressive Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 16B6521 | D/9 Drawing number reference only U.S. Government activity |
| 16B6521-25 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1560-01-481-4307 is a Stiffener,aircraft, manufactured by H.m. Dunn Company Inc Dba Nex-Tech Aerospace, classified under FSC 1560, Airframe Structural Components. Status: active.
NSN 1560-01-481-4307 has 4 manufacturer part numbers on file: 16B6521-25 (H.m. Dunn Company Inc Dba Nex-Tech Aerospace), 16B6521-25 (Aerospace Engineering & Support Inc Div Aerospace Engineering and Support, Inc.), 16B6521-25 (Aerospace & Commercial Technologies, Llc Dba Aerospace & Commercial Technologies Llc), 16B6521-25 (Progressive Inc Div Progressive Incorporated).
3 possible matches (shared part number, not a government interchangeability claim): 1560-01-481-4349, 1560-01-481-4431, 1560-01-481-4432. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1560-01-481-4307 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.