The Guide,valve Stem, cataloged under National Stock Number 4820-01-532-0638, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William E Williams Valve Corp. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-532-0638 |
| Primary Part Number | LHD0004 NO.10 2.5IN |
| Item Name | Guide,valve Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William E Williams Valve Corp |
| Status | ACTIVE |
| Style Designator | PLAIN FLANGED |
| Material | STEEL AND SILICON |
| 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 |
|---|---|
| LHD0004 NO.10 2.5IN PRIMARY | William E Williams Valve Corp (USA) |
| Reference | Meaning |
|---|---|
| LHD0004 | D/9 Drawing number reference only William E Williams Valve Corp |
NSN 4820-01-532-0638 is a Guide,valve Stem, manufactured by William E Williams Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-532-0638 has 1 manufacturer part number on file: LHD0004 NO.10 2.5IN (William E Williams Valve Corp).
Key specifications for LHD0004 NO.10 2.5IN: Style Designator: PLAIN FLANGED; Part Name Assigned by Controlling Agency: BACK SEAT; End Item Identification: 4820-01-532-0603 STOP-CHECK VALVE, 2.5; Material: STEEL AND SILICON. 2 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.