The Coupling,pipe, cataloged under National Stock Number 4730-01-104-4028, 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 Naval Inventory Control Point Mechanicsburg. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-104-4028 |
| Primary Part Number | ANSIB16.11(COUPLING)1-1/4INL1 |
| Item Name | Coupling,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 1.250 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Criticality Code Justification | ZZZY |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Material Document and Classification | ASTM A234 WPB NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nondefinitive Spec/std Data | 3000 CLASS |
| Material | STEEL OVERALL |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| ANSIB16.11(COUPLING)1-1/4INL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| ASTM A234SWLDGL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| ANSI B16.11L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| ANSIB16.11(COUPLING)1-1/4IN | 5/1 Secondary reference U.S. Government activity |
| ANSI B16.11 | 3/1 Design control — primary reference U.S. Government activity |
| ASTM A234SWLDG | 5/1 Secondary reference U.S. Government activity |
NSN 4730-01-104-4028 is a Coupling,pipe, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-104-4028 has 2 manufacturer part numbers on file: ANSIB16.11(COUPLING)1-1/4INL1 (Naval Inventory Control Point Mechanicsburg), ASTM A234SWLDGL1 (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-105-4955. Verify interchangeability with system specifications before substitution.
Key specifications for ANSIB16.11(COUPLING)1-1/4INL1: Nominal Pipe Size Accommodated: 1.250 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Criticality Code Justification: ZZZY; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS. 8 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.