The Hose,nonmetallic, cataloged under National Stock Number 4720-01-451-4501, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4720-01-451-4501 |
| Primary Part Number | 8C3681 |
| Item Name | Hose,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Cross-Sectional Shape Style | ROUND |
| Inside Surface Condition | SMOOTH |
| 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 |
|---|---|
| 8C3681 | Royston Limited (GBR) |
| 8C3681 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 8C3681 | Mitsubishi Caterpillar Forklift America, Inc (USA) |
| 8C-3681 | Hastings Deering (aust) Pty Ltd (AUS) |
| 8C-3681 | William Adams Pty Ltd (AUS) |
| 8C-3681 | Westrac Equipment Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| 449-7268 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 4720-01-451-4501 is a Hose,nonmetallic, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-451-4501 has 6 manufacturer part numbers on file: 8C3681 (Royston Limited), 8C3681 (Caterpillar Inc Div Caterpillar Defense), 8C3681 (Mitsubishi Caterpillar Forklift America, Inc), 8C-3681 (Hastings Deering (aust) Pty Ltd), 8C-3681 (William Adams Pty Ltd) and 1 more.
Key specifications for 8C3681: Cross-Sectional Shape Style: ROUND; Inside Surface Condition: SMOOTH; End Item Identification: USED ON CATERPILLAR DIESEL ENGINE, MODEL NO. HSL 3208 DIT. 2 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.