The Trap,steam, cataloged under National Stock Number 4730-00-131-6557, 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 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-131-6557 |
| Primary Part Number | D21675-460CSW L1 |
| Item Name | Trap,steam |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Design Type | PULSATING |
| Criticality Code Justification | ZZZY |
| Inlet Connection Type | SOCKET WELDING |
| Body Design | STRAIGHT PATTERN |
| Rated Capacity at Maximum Working Pressure | 4000.0 POUNDS OF WATER PER HOUR LBS |
| Material | STEEL BODY |
| Material | STEEL CORROSION RESISTING WORKING PARTS |
| Furnished Items | STRAINER |
| Outlet Connection Type | SOCKET WELDING |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 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 |
|---|---|
| D21675-460CSW L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| D21675REV9-460CSWL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| D21675REV9-460CSW | 3/9 Design control — primary reference Pentair Valves & Controls Us Lp Div Pentair Flow Control |
NSN 4730-00-131-6557 is a Trap,steam, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-131-6557 has 1 manufacturer part number on file: D21675-460CSW L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for D21675-460CSW L1: Design Type: PULSATING; Criticality Code Justification: ZZZY; Inlet Connection Type: SOCKET WELDING; Special Features: AS DIFFERNTIATED BY INLET/OUTLET CONNECTION NOMINAL PIPE SIZE, INLET/OUTLET CONNECTION TYPE. 10 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.