The Valve,ball, cataloged under National Stock Number 4820-01-179-9839, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Staples & Pfeiffer, Inc.. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-179-9839 |
| Primary Part Number | SH021AN600AASSYF |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Staples & Pfeiffer, Inc. |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES SECOND ENDROUND WITH HOLES SECOND END |
| Flange Shape | ROUND FIRST ENDROUND FIRST END |
| Flange Face Design | PLAIN FIRST ENDPLAIN FIRST END |
| Flange Face Design | PLAIN SECOND ENDPLAIN SECOND END |
| Bolt Circle Nominal Diameter | 8.875 INCHES SECOND END8.875 INCHES SECOND END IN |
| Connection Type | FLANGE SECOND ENDFLANGE SECOND END |
| Connection Type | FLANGE FIRST ENDFLANGE FIRST END |
| Style Designator | STRAIGHT THRU FLANGED ENDSSTRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.562 INCHES SECOND END0.562 INCHES SECOND END IN |
| Valve Size | 2.938 INCHES2.938 INCHES IN |
| Nominal Outside Diameter | 10.125 INCHES SECOND END10.125 INCHES SECOND END IN |
| Nominal Outside Diameter | 10.500 INCHES FIRST END10.500 INCHES FIRST END IN |
| Bolt Hole Quantity | 12 SECOND END12 SECOND END |
| Face to Face Distance | 7.750 INCHES7.750 INCHES IN |
| Material | STEEL BODY |
| Material | PLASTIC SEAT |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Valve Operation Method | MANUALMANUAL |
| Nominal Thickness | 0.562 INCHES FIRST END0.562 INCHES FIRST END IN |
| Nominal Thickness | 1.438 INCHES SECOND END1.438 INCHES SECOND END 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 |
|---|---|
| SH021AN600AASSYF PRIMARY | Staples & Pfeiffer, Inc. (USA) |
| Reference | Meaning |
|---|---|
| SH021-A | D/9 Drawing number reference only Western Industrial Supply |
| SH021AN600AASSYF | 5/9 Secondary reference Western Industrial Supply |
NSN 4820-01-179-9839 is a Valve,ball, manufactured by Staples & Pfeiffer, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-179-9839 has 1 manufacturer part number on file: SH021AN600AASSYF (Staples & Pfeiffer, Inc.).
Key specifications for SH021AN600AASSYF: Flange Shape: ROUND WITH HOLES SECOND ENDROUND WITH HOLES SECOND END; Flange Shape: ROUND FIRST ENDROUND FIRST END; Flange Face Design: PLAIN FIRST ENDPLAIN FIRST END; Flange Face Design: PLAIN SECOND ENDPLAIN SECOND END. 20 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.