The Guide Block,crane, cataloged under National Stock Number 3940-01-687-2900, is classified within Federal Supply Class 3940 (Blocks, Tackle, Rigging, and Slings) of the Materials Handling Equipment group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | Guide Block,crane |
| FSC / FSG | 3940 — Blocks, Tackle, Rigging, and Slings (FSG 39) |
| Manufacturers | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (CAGE 30003); Navy, United States Department of the Dba Naval Surface Warfare Center Div Naval Surface Warfare Center Crane Division (CAGE 12255) |
| Parameter | Value |
|---|---|
| NSN | 3940-01-687-2900 |
| Primary Part Number | 4091AS1077-2 |
| Item Name | Guide Block,crane |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | V |
| Part Number | Manufacturer |
|---|---|
| 4091AS1077-2 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 4091AS1077-2 PRIMARY | Navy, United States Department of the Dba Naval Surface Warfare Center Div Naval Surface Warfare Center Crane Division (USA) |
NSN 3940-01-687-2900 is a Guide Block,crane, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-687-2900 has 2 manufacturer part numbers on file: 4091AS1077-2 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 4091AS1077-2 (Navy, United States Department of the Dba Naval Surface Warfare Center Div Naval Surface Warfare Center Crane Division).
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.