The Nylon Checkball, cataloged under National Stock Number 4440-01-034-9721, is classified within Federal Supply Class 4440 (Driers, Dehydrators, and Anhydrators) of the Furnace, Steam, Drying, Nuclear Reactors group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4440-01-034-9721 |
| Item Name | Nylon Checkball |
| FSC / FSG | 4440 / 44 — Driers, Dehydrators, and Anhydrators |
| Status | ACTIVE |
| General Characteristics Item Description | USED ON MODEL DOO-ACQZS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| DRP-79-607 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division |
| DRP-79-607 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4440-01-034-9721 is a Nylon Checkball, classified under FSC 4440, Driers, Dehydrators, and Anhydrators. Status: active.
Key specifications for 4440-01-034-9721: General Characteristics Item Description: USED ON MODEL DOO-ACQZS. 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.