The Parts Kit,steam Trap, cataloged under National Stock Number 4730-01-421-1642, 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 Armstrong International Inc Dba Armstrong Machine Works. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-421-1642 |
| Primary Part Number | 981 PCA 5/32 ORIFICE |
| Item Name | Parts Kit,steam Trap |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Armstrong International Inc Dba Armstrong Machine Works |
| Status | ACTIVE |
| Component Quantity | 7 |
| End Item Source | 03933 |
| Model Number | 981 |
| Component Document Origin | INDUSTRIAL |
| End Item Name | STRATEGIC SEALIFT CONVERSION SHIPS CLASS |
| Nonsupply Items and Quantities | VALVE SEAT 1; VALVE 1; VALVE RETAINER 1; VALVE LEVER 1; GUIDE PIN ASSEMBLY 1; SCREWS 2 |
| Document Source | 03933 |
| 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 |
|---|---|
| 981 PCA 5/32 ORIFICE PRIMARY | Armstrong International Inc Dba Armstrong Machine Works (USA) |
| Reference | Meaning |
|---|---|
| 981 PCA 5/32" | C/1 Advisory reference — outside the item-of-supply concept Armstrong International Inc Dba Armstrong Machine Works |
NSN 4730-01-421-1642 is a Parts Kit,steam Trap, manufactured by Armstrong International Inc Dba Armstrong Machine Works, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-421-1642 has 1 manufacturer part number on file: 981 PCA 5/32 ORIFICE (Armstrong International Inc Dba Armstrong Machine Works).
Key specifications for 981 PCA 5/32 ORIFICE: Component Quantity: 7; End Item Source: 03933; Model Number: 981; Component Document Origin: INDUSTRIAL. 7 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.