The Adjusting Ring,valve, cataloged under National Stock Number 4820-01-040-4980, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-040-4980 |
| Item Name | Adjusting Ring,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| General Characteristics Item Description | CRES STEEL CASTING,3.250 IN. OD,2.970 IN. ID,1.219 IN O/A LG,FLANGE 3.625 IN. OD,0.625 IN. THK,ID TAPERED 22 DEG ON FLANGE SIDE,THD END 3.000 IN. OD,2.750 IN. ID,2.500-16UN-3B FIT,FLANGE SLOTTED ON OD,2 DRILLED HOLES 0.156 IN. DIA,180 DEG APART IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 0089093 | 3/9 Design control — primary reference Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| 5VKG72 | D/9 Drawing number reference only Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| 5V0G72PC3 | 5/9 Secondary reference Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| 89093 | 5/9 Secondary reference Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
| 3198092 | D/9 Drawing number reference only Naval Sea Systems Command |
| 5VKG72PC3 | 5/9 Secondary reference Dresser, Inc. Dba Dresser Equipment Group Div Industrial Valve Operations, Dresse |
NSN 4820-01-040-4980 is a Adjusting Ring,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-041-3148. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-040-4980: General Characteristics Item Description: CRES STEEL CASTING,3.250 IN. OD,2.970 IN. ID,1.219 IN O/A LG,FLANGE 3.625 IN. OD,0.625 IN. THK,ID TAPERED 22 DEG ON FLANGE SIDE,THD END 3.000 IN. OD,2.750 IN. ID,2.500-16UN-3B FIT,FLANGE SLOTTED ON OD,2 DRILLED HOLES 0.156 IN. DIA,180 DEG APART IN; End Item Identification: DRESSER INDUSTRIES 2-1/2 IN. TYPE 1553 SAFETY RELIEF VALVE 5VKG72 IN. 1 specification is 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.