The Hose,air Duct, cataloged under National Stock Number 4720-01-027-4536, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems. Government technical data includes 12 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-027-4536 |
| Primary Part Number | 167C1649 |
| Item Name | Hose,air Duct |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems |
| Status | ACTIVE |
| Measuring Method and Length | 40.000 INCHES NOMINAL OVERALL IN |
| Connection Style | ROUND FIRST END |
| Connection Type | SOFT FIRST END |
| Style Designator | FULLY CONVOLUTED |
| Material Document and Classification | MIL-H-8796, TYPE 4, CLASS 2 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-H-62028, TYPE 3, CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE ALL PLIES |
| Cross-Sectional Shape Style | ROUND |
| Wall Thickness | 0.014 INCHES NOMINAL IN |
| Inside Diameter | 4.000 INCHES NOMINAL FIRST END IN |
| End Overall Length | 1.500 INCHES NOMINAL FIRST END IN |
| End Inside Diameter | 4.000 INCHES NOMINAL FIRST END IN |
| Material | STEEL REINFORCING WIRE |
| Material | RUBBER SYNTHETIC ALL PLIES |
| 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 |
|---|---|
| 167C1649 PRIMARY | General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA) |
| Reference | Meaning |
|---|---|
| GEN-5003-32-160-64 | 5/9 Secondary reference Flexfab Llc |
| SILFAB-2 4IN ID X 40 IN LG | C/1 Advisory reference — outside the item-of-supply concept Flexfab Llc |
| GEN5003-0000 | 3/2 Design control — primary reference U.S. Government activity |
| GEN5003-0000 | 5/9 Secondary reference Flexfab Llc |
NSN 4720-01-027-4536 is a Hose,air Duct, manufactured by General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-027-4536 has 1 manufacturer part number on file: 167C1649 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems).
Key specifications for 167C1649: Measuring Method and Length: 40.000 INCHES NOMINAL OVERALL IN; Connection Style: ROUND FIRST END; Connection Type: SOFT FIRST END; Style Designator: FULLY CONVOLUTED. 12 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.