The Cock,drain, cataloged under National Stock Number 4820-01-236-1225, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Weil Pump Co Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-236-1225 |
| Primary Part Number | A1521 PIECE 29 |
| Item Name | Cock,drain |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Weil Pump Co Inc |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| A1521 PIECE 29 PRIMARY | Weil Pump Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 64L 1/4IN | 5/9 Secondary reference Essex Brass Corporation |
| A1521 | 5/9 Secondary reference Weil Pump Co Inc |
NSN 4820-01-236-1225 is a Cock,drain, manufactured by Weil Pump Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-236-1225 has 1 manufacturer part number on file: A1521 PIECE 29 (Weil Pump Co Inc).
3 possible matches (shared part number, not a government interchangeability claim): 8455-01-528-9444, 8455-01-647-8945, 8455-01-699-3693. Verify interchangeability with system specifications before substitution.
Key specifications for A1521 PIECE 29: Style Designator: STRAIGHT THRU; Nominal Thread Size: 0.250 INCHES ALL ENDS IN; Valve Operation Method: MANUAL. 3 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.