The Valve,inlet 4th Cylinder, cataloged under National Stock Number 4310-00-467-9992, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Steward Machine Co Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4310-00-467-9992 |
| Primary Part Number | 20A987K |
| Item Name | Valve,inlet 4th Cylinder |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Steward Machine Co Inc |
| Status | ACTIVE |
| General Characteristics Item Description | STAINLESS STEEL,LENGTH 1.750 IN,MAJOR DIA 1.370 IN,MINIMUM DIA 1.078 IN |
| 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 |
|---|---|
| 20A987K PRIMARY | Steward Machine Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 20A987K | 5/9 Secondary reference Hardie-Tynes Co., Inc. |
NSN 4310-00-467-9992 is a Valve,inlet 4th Cylinder, manufactured by Steward Machine Co Inc, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-00-467-9992 has 1 manufacturer part number on file: 20A987K (Steward Machine Co Inc).
Key specifications for 20A987K: General Characteristics Item Description: STAINLESS STEEL,LENGTH 1.750 IN,MAJOR DIA 1.370 IN,MINIMUM DIA 1.078 IN. 1 specification is 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.