The Flyover Block Assy, cataloged under National Stock Number 3940-01-438-5335, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3940-01-438-5335 |
| Primary Part Number | 28284-2 |
| Item Name | Flyover Block Assy |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 28284 FIND 2 | Naval Sea Systems Command (USA) |
| 28284-2 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 28284 FIND 2 | C/1 Advisory reference — outside the item-of-supply concept United States Department of the Navy Dba Naval Surface Warfare Center Panama City |
NSN 3940-01-438-5335 is a Flyover Block Assy, manufactured by Naval Sea Systems Command, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-438-5335 has 2 manufacturer part numbers on file: 28284 FIND 2 (Naval Sea Systems Command), 28284-2 (Naval Sea Systems Command).
Key specifications for 28284-2: Overall Height: 15.750 INCHES NOMINAL IN; Overall Length: 152.900 INCHES NOMINAL IN; Overall Width: 54.000 INCHES NOMINAL IN; Special Features: PROOF TESTED TO 250,000 POUND VERTICAL LOAD: (4) PER CRAFT LBS. 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.