General Characteristics Item Description: STEEL; 2.266 IN. OD; 1.453 IN. ID; 0.156 IN. THK; 0.125 IN. INSIDE RADIUS IN
Identification
NSN: 4820-00-400-6684
NIIN: 004006684
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
General Description
The Packing Ring, cataloged under National Stock Number 4820-00-400-6684, 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1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-400-6684
Item Name
Packing Ring
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
General Characteristics Item Description
STEEL; 2.266 IN. OD; 1.453 IN. ID; 0.156 IN. THK; 0.125 IN. INSIDE RADIUS IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5950-00-539-702143077POSSIBLE MATCH
COIL,ELECTRICAL
Possible match (shared part number)L3harris Technologies, Inc Div Space & Airborne Systems
2995-00-992-818343077POSSIBLE MATCH
PARTS KIT,VALVE,OVE
Possible match (shared part number)Ontic Engineering & Manufacturing, Inc Dba Ontic Us
5905-01-294-1957698-3-R10KDPOSSIBLE MATCH
RESISTOR NETWORK,FIXED,FILM
Possible match (shared part number)Bi Technologies Corporation Div Bi Technologies Corp.
5962-01-313-881543-077POSSIBLE MATCH
MICROCIRCUIT,DIGITAL
Possible match (shared part number)Hydro-Aire Aerospace Corp
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
43077
5/9Secondary reference
U.S. Government activity
43077
3/9Design control — primary reference
U.S. Government activity
Related Parts
5950-00-539-7021POSSIBLE MATCH
COIL,ELECTRICAL
43077
2995-00-992-8183POSSIBLE MATCH
PARTS KIT,VALVE,OVE
43077
5905-01-294-1957POSSIBLE MATCH
RESISTOR NETWORK,FIXED,FILM
698-3-R10KD
5962-01-313-8815POSSIBLE MATCH
MICROCIRCUIT,DIGITAL
43-077
Frequently Asked Questions
What is NSN 4820-00-400-6684?
NSN 4820-00-400-6684 is a Packing Ring, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-00-400-6684?
4 possible matches (shared part number, not a government interchangeability claim): 5950-00-539-7021, 2995-00-992-8183, 5905-01-294-1957. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-00-400-6684?
Key specifications for 4820-00-400-6684: General Characteristics Item Description: STEEL; 2.266 IN. OD; 1.453 IN. ID; 0.156 IN. THK; 0.125 IN. INSIDE RADIUS IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-00-400-6684 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.