The Valve,butterfly, cataloged under National Stock Number 4820-01-656-3062, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Flowline Valve and Controls, L.l.c.. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-656-3062 |
| Primary Part Number | 77-020N-5917R30 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Flowline Valve and Controls, L.l.c. |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 4.75 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | ASTM B148 C95800 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM A494 -35-1 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM B865 N05500 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Valve Size | 2.00 INCHES IN |
| Mounting Facility | LUG(S) |
| Bolt Hole Quantity | 4 ALL ENDS |
| Face to Face Distance | 1.69 INCHES IN |
| Material | NICKEL ALLOY STEM |
| Material | BRONZE BODY |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Raised Face Nominal Diameter | 3.62 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 |
|---|---|
| 77-020N-5917R30 PRIMARY | Flowline Valve and Controls, L.l.c. (USA) |
| Reference | Meaning |
|---|---|
| FL 77N-0150-1AB-R1 REV D | D/9 Drawing number reference only Flowline Valve and Controls, L.l.c. |
NSN 4820-01-656-3062 is a Valve,butterfly, manufactured by Flowline Valve and Controls, L.l.c., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-656-3062 has 1 manufacturer part number on file: 77-020N-5917R30 (Flowline Valve and Controls, L.l.c.).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-656-4845. Verify interchangeability with system specifications before substitution.
Key specifications for 77-020N-5917R30: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Bolt Circle Nominal Diameter: 4.75 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS. 16 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.