The Piston,linear Actuating Cylinder, cataloged under National Stock Number 3040-01-198-3028, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-198-3028 |
| Primary Part Number | 20335-H PIECE 6 |
| Item Name | Piston,linear Actuating Cylinder |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa |
| Status | ACTIVE |
| Material | IRON CAST |
| 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 |
|---|---|
| 20335-H PIECE 6 PRIMARY | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa (USA) |
| Reference | Meaning |
|---|---|
| 20335-H | D/9 Drawing number reference only Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa |
NSN 3040-01-198-3028 is a Piston,linear Actuating Cylinder, manufactured by Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-198-3028 has 1 manufacturer part number on file: 20335-H PIECE 6 (Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa).
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-198-3074, 3040-01-198-3076, 4820-01-199-8761. Verify interchangeability with system specifications before substitution.
Key specifications for 20335-H PIECE 6: Special Features: ASTM A-339; Material: IRON CAST. 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.