The Valve,gate, cataloged under National Stock Number 4820-01-272-6660, 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 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-272-6660 |
| Primary Part Number | LHD8423 |
| Item Name | Valve,gate |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William E Williams Valve Corp |
| Status | ACTIVE |
| Inlet Relationship with Outlet | IDENTICAL |
| Flange Face Design | RAISED |
| Maximum Operating Temp and Media for Which Designed | 567.0 FAHRENHEIT STEAM DEGF |
| Operating Pressure and Type | 150.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS |
| Stem Type | NONRISING |
| Connection Type | FLANGE, ROUND W/HOLES |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | ASTM A743 ASSN STD SINGLE MATERIAL RESPONSE DISK |
| Valve Size | 1.500 INCHES IN |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Bolt Hole Quantity | 4 |
| Flange Diameter | 5.000 INCHES IN |
| Bonnet Attachment Method | BOLTED |
| Face to Face Distance | 6.500 INCHES IN |
| Material | STEEL COMP 416 STEM |
| Material | STEEL UNS K03504 BODY |
| Material | STEEL COMP 410 SEAT |
| Material | STEEL COMP 420 DISK |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| LHD8423 | William E Williams Valve Corp (USA) |
| Reference | Meaning |
|---|---|
| F158D 1-1/2IN | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-01-272-6660 is a Valve,gate, manufactured by William E Williams Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-272-6660 has 1 manufacturer part number on file: LHD8423 (William E Williams Valve Corp).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-273-0359. Verify interchangeability with system specifications before substitution.
Key specifications for LHD8423: Inlet Relationship with Outlet: IDENTICAL; Flange Face Design: RAISED; Maximum Operating Temp and Media for Which Designed: 567.0 FAHRENHEIT STEAM DEGF; Operating Pressure and Type: 150.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS. 21 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.