The Valve,angle, cataloged under National Stock Number 4820-01-287-7799, 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 24 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-287-7799 |
| Primary Part Number | 153F-1 4IN |
| Item Name | Valve,angle |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William E Williams Valve Corp |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 7.500 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | ASTM A216 GRADE WCB ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Valve Size | 4.000 INCHES IN |
| Features Provided | BONNET PACKING |
| Bonnet Type | INSIDE SCREW |
| Second Connection Face to Centerline Distance | 5.625 INCHES IN |
| Nominal Outside Diameter | 9.000 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| Bonnet Attachment Method | BOLTED |
| First Connection Face to Centerline Distance | 5.625 INCHES IN |
| Material | STEEL UNS J03002 BODY |
| Material | CHROMIUM ALLOY FLOW CONTROL DEVICE |
| Material | CHROMIUM ALLOY SEAT |
| Material | CHROMIUM ALLOY STEM |
| Raised Face Nominal Diameter | 6.188 INCHES ALL ENDS IN |
| Valve Operation Method | MANUAL |
| Raised Face Nominal Height | 0.062 INCHES ALL ENDS IN |
| Nominal Thickness | 0.922 INCHES ALL ENDS 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 |
|---|---|
| 8751 FIGURE 153F-1 4IN | William E Williams Valve Corp (USA) |
| 153F-1 4IN PRIMARY | William E Williams Valve Corp (USA) |
NSN 4820-01-287-7799 is a Valve,angle, manufactured by William E Williams Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-287-7799 has 2 manufacturer part numbers on file: 8751 FIGURE 153F-1 4IN (William E Williams Valve Corp), 153F-1 4IN (William E Williams Valve Corp).
Key specifications for 153F-1 4IN: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Bolt Circle Nominal Diameter: 7.500 INCHES ALL ENDS IN. 24 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.