The Hose,air Duct, cataloged under National Stock Number 4720-01-308-1776, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-308-1776 |
| Primary Part Number | 21A29 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc |
| Status | ACTIVE |
| Measuring Method and Length | 1.900 INCHES NOMINAL OVERALL IN |
| Connection Type | PLAIN BOTH ENDS |
| Style Designator | SLEEVE SECTION |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.063 INCHES NOMINAL IN |
| Inside Diameter | 2.620 INCHES NOMINAL FIRST END IN |
| Material | FIBERGLASS AND RUBBER SILICONE CLASS Q SINGLE PLY |
| 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 |
|---|---|
| LE261-0107-0003 | The Boeing Company Div Legacy Am&m (USA) |
| 21A29 PRIMARY | Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc (USA) |
| SF-28-153-0003 | Royal Engineered Composites, Inc. (USA) |
| Reference | Meaning |
|---|---|
| LE261-0107 | D/9 Drawing number reference only The Boeing Company Div Legacy Am&m |
NSN 4720-01-308-1776 is a Hose,air Duct, manufactured by Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-308-1776 has 3 manufacturer part numbers on file: LE261-0107-0003 (The Boeing Company Div Legacy Am&m), 21A29 (Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc), SF-28-153-0003 (Royal Engineered Composites, Inc.).
Key specifications for 21A29: Measuring Method and Length: 1.900 INCHES NOMINAL OVERALL IN; Connection Type: PLAIN BOTH ENDS; Style Designator: SLEEVE SECTION; Cross-Sectional Shape Style: ROUND. 7 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.