The Block,tackle, cataloged under National Stock Number 3940-01-505-5341, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is United States Department of the Navy Dba Naval Surface Warfare Center Panama City. Government technical data includes 6 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-01-505-5341 |
| Primary Part Number | 25197-1 |
| Item Name | Block,tackle |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | United States Department of the Navy Dba Naval Surface Warfare Center Panama City |
| Status | ACTIVE |
| Attachment Style | ROUND SWIVEL EYE |
| Block Type | SNATCH |
| Center Pin Diameter | 0.500 INCHES NOMINAL IN |
| Style Designator | HALF-OVAL PATTERN |
| Sheave Quantity | 1 |
| Material | STEEL CORROSION RESISTING CENTER PIN |
| 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 |
|---|---|
| 25197-1 PRIMARY | United States Department of the Navy Dba Naval Surface Warfare Center Panama City (USA) |
NSN 3940-01-505-5341 is a Block,tackle, manufactured by United States Department of the Navy Dba Naval Surface Warfare Center Panama City, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-505-5341 has 1 manufacturer part number on file: 25197-1 (United States Department of the Navy Dba Naval Surface Warfare Center Panama City).
1 possible match (shared part number, not a government interchangeability claim): 9520-01-538-4202. Verify interchangeability with system specifications before substitution.
Key specifications for 25197-1: Attachment Style: ROUND SWIVEL EYE; Block Type: SNATCH; Center Pin Diameter: 0.500 INCHES NOMINAL IN; Style Designator: HALF-OVAL PATTERN. 6 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.