The Guide,disc, cataloged under National Stock Number 4820-00-336-5504, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 1 specification, 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 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 | 4820-00-336-5504 |
| Primary Part Number | 84977 |
| Item Name | Guide,disc |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| General Characteristics Item Description | CRES; 4.995 IN. MAJOR OD; 4.093 IN. O/A LG; 2.270 IN. ID; MULTI GROOVED 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 |
|---|---|
| 84977 PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-336-5504 is a Guide,disc, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-336-5504 has 1 manufacturer part number on file: 84977 (Ashcroft Inc Dba Heise).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-330-9170. Verify interchangeability with system specifications before substitution.
Key specifications for 84977: General Characteristics Item Description: CRES; 4.995 IN. MAJOR OD; 4.093 IN. O/A LG; 2.270 IN. ID; MULTI GROOVED 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.