The Ring,pilot Chest Valve, cataloged under National Stock Number 4320-01-253-0529, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is M.t. Davidson Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-253-0529 |
| Primary Part Number | G-86 PIECE 17 |
| Item Name | Ring,pilot Chest Valve |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | M.t. Davidson Company |
| Status | ACTIVE |
| General Characteristics Item Description | CAST IRON;1.500 IN. ID;1.750 IN. OD;0.125 IN. W 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 |
|---|---|
| G-86 PIECE 17 PRIMARY | M.t. Davidson Company (USA) |
| Reference | Meaning |
|---|---|
| G-89 PIECE 17 | 3/9 Design control — primary reference M.t. Davidson Company |
NSN 4320-01-253-0529 is a Ring,pilot Chest Valve, manufactured by M.t. Davidson Company, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-253-0529 has 1 manufacturer part number on file: G-86 PIECE 17 (M.t. Davidson Company).
Key specifications for G-86 PIECE 17: General Characteristics Item Description: CAST IRON;1.500 IN. ID;1.750 IN. OD;0.125 IN. W IN; End Item Identification: U/O MODEL 9X10X12 IN. VERTICAL BILGE PUMP. 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.