The Flange,pipe, cataloged under National Stock Number 4730-01-374-3420, 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 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-374-3420 |
| Primary Part Number | ANSIB16.5 FLANGE 4INL1 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Nominal Pipe Size for Which Designed | 4.000 INCHES IN |
| Supplementary Features | 900PSI-4.026 BORE DIMENSION-SCHEDULE 40 |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE |
| Material | STEEL |
| 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 |
|---|---|
| ANSIB16.5 FLANGE 4INL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| ANSIB16.5L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| ANSIB16.5 FLANGE 4IN | 5/1 Secondary reference U.S. Government activity |
| ANSIB16.5 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4730-01-374-3420 is a Flange,pipe, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-374-3420 has 1 manufacturer part number on file: ANSIB16.5 FLANGE 4INL1 (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-374-3427. Verify interchangeability with system specifications before substitution.
Key specifications for ANSIB16.5 FLANGE 4INL1: Nominal Pipe Size for Which Designed: 4.000 INCHES IN; Supplementary Features: 900PSI-4.026 BORE DIMENSION-SCHEDULE 40; Criticality Code Justification: ZZZY; Material Document and Classification: ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE. 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.