The Stem,pneumatic Valve, cataloged under National Stock Number 4820-01-027-8380, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Schrader-Bridgeport International Inc Dba Schrader Automotive. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-027-8380 |
| Primary Part Number | 3642-177 |
| Item Name | Stem,pneumatic Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Schrader-Bridgeport International Inc Dba Schrader Automotive |
| Status | ACTIVE |
| General Characteristics Item Description | CRES AISI 303 COND A,CORE END EXTERNAL THD SIZE 0.302-32,MTG END EXTERNAL THD SIZE 1/8-27 NPT,O/A LG 1.031 IN.,7/16 IN. HEX WRENCHING FEATURE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-01-027-8380 is a Stem,pneumatic Valve, manufactured by Schrader-Bridgeport International Inc Dba Schrader Automotive, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-027-8380 has 2 manufacturer part numbers on file: 3642-177 (Schrader-Bridgeport International Inc Dba Schrader Automotive), 3642-1 (Schrader-Bridgeport International Inc Dba Schrader Automotive).
2 possible matches (shared part number, not a government interchangeability claim): 2925-01-085-0691, 6210-01-118-9742. Verify interchangeability with system specifications before substitution.
Key specifications for 3642-177: General Characteristics Item Description: CRES AISI 303 COND A,CORE END EXTERNAL THD SIZE 0.302-32,MTG END EXTERNAL THD SIZE 1/8-27 NPT,O/A LG 1.031 IN.,7/16 IN. HEX WRENCHING FEATURE IN; End Item Identification: SPECIAL AIRCRAFT AND ENGINE SUPPORT EQUIPMENT. 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.