The Ball,check, cataloged under National Stock Number 4820-01-325-9545, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tr Engineering, Inc Div Tr Engineering Incorporated. Government technical data includes 2 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 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 | 4820-01-325-9545 |
| Primary Part Number | 100-18-0 |
| Item Name | Ball,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tr Engineering, Inc Div Tr Engineering Incorporated |
| Status | ACTIVE |
| Valve Design Control Activity | 63465 |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 100-18-0 PRIMARY | Tr Engineering, Inc Div Tr Engineering Incorporated (USA) |
NSN 4820-01-325-9545 is a Ball,check, manufactured by Tr Engineering, Inc Div Tr Engineering Incorporated, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-325-9545 has 1 manufacturer part number on file: 100-18-0 (Tr Engineering, Inc Div Tr Engineering Incorporated).
2 possible matches (shared part number, not a government interchangeability claim): 6515-01-335-7917, 6635-01-723-7955. Verify interchangeability with system specifications before substitution.
Key specifications for 100-18-0: Valve Design Control Activity: 63465; Material: STEEL CORROSION RESISTING. 2 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.