The Clamp,hose, cataloged under National Stock Number 4730-01-221-3591, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-221-3591 |
| Primary Part Number | 902-325-1SH |
| Item Name | Clamp,hose |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| Status | ACTIVE |
| Temp Rating | 450.0 FAHRENHEIT DEGF |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE NUT |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE BOLT |
| Fastening Device Type | SELF-LOCKING HEXAGON NUT |
| Style Designator | BAND |
| Material Document and Classification | MIL-S-5059 MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Inside Diameter | 3.250 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM NUT |
| Surface Treatment | CADMIUM BOLT |
| Surface Treatment | PASSIVATE BAND |
| Material | STEEL COMP 301 BAND |
| Material | STEEL NUT |
| Material | STEEL COMP 4037 BOLT |
| 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 |
|---|---|
| GC501K325H1 | Northrop Grumman Systems Corporation (USA) |
| 902-325-1SH PRIMARY | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| Reference | Meaning |
|---|---|
| 902-325-1SH | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| GC501K | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 4730-01-221-3591 is a Clamp,hose, manufactured by Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-221-3591 has 2 manufacturer part numbers on file: GC501K325H1 (Northrop Grumman Systems Corporation), 902-325-1SH (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution).
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-221-3592, 4730-01-222-3741, 4730-01-284-6118. Verify interchangeability with system specifications before substitution.
Key specifications for 902-325-1SH: Temp Rating: 450.0 FAHRENHEIT DEGF; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE NUT; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE BOLT; Fastening Device Type: SELF-LOCKING HEXAGON NUT. 13 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.