The Coupling,clamp,pipe, cataloged under National Stock Number 4730-00-455-9339, 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 Atap Inc. Government technical data includes 6 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-00-455-9339 |
| Primary Part Number | C77-4T |
| Item Name | Coupling,clamp,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Atap Inc |
| Status | ACTIVE |
| Tube Outside Diameter for Which Designed | 4.344 INCHES MINIMUM AND 4.375 INCHES MAXIMUM IN |
| Pipe Size Accommodated | 4.000 INCHES NOMINAL IN |
| End Type for Which Designed | COLLARED |
| Segment Quantity | 2 |
| Material | IRON OR STEEL HOUSING |
| Material | RUBBER SYNTHETIC OR RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR GASKET |
| 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 |
|---|---|
| C77-4T PRIMARY | Atap Inc (USA) |
| Reference | Meaning |
|---|---|
| 05-231-0408 | 5/9 Secondary reference Wheeler Fleet Solutions, Co. |
| 231-0408 | 5/9 Secondary reference U.S. Government activity |
| 00231-0408 | 5/9 Secondary reference U.S. Government activity |
| 00231-0408 | 5/9 Secondary reference Asrc Federal Facilities Logistics, Llc |
NSN 4730-00-455-9339 is a Coupling,clamp,pipe, manufactured by Atap Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-455-9339 has 1 manufacturer part number on file: C77-4T (Atap Inc).
Key specifications for C77-4T: Tube Outside Diameter for Which Designed: 4.344 INCHES MINIMUM AND 4.375 INCHES MAXIMUM IN; Pipe Size Accommodated: 4.000 INCHES NOMINAL IN; End Type for Which Designed: COLLARED; Special Features: W/2 STEEL BOLTS AND 2 STEEL NUTS. 6 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.