The Assy,stopblock,stbd, cataloged under National Stock Number 3940-01-500-3872, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3940-01-500-3872 |
| Primary Part Number | 596-7410337-A3 |
| Item Name | Assy,stopblock,stbd |
| FSC / FSG | 3940 / 39 — Blocks, Tackle, Rigging, and Slings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Accessory Components and Quantity | BLOCK 1, STOP PAD 4, CENTER BLOCK 1, SHAFT 1, FLANGED JOURNAL BEARING 2, SQUARE KEY 1, BEARING SELF-LOCKING LOCKNUT 1, SCH CYL SELF-LOCKING CAP SCREW 10, WASHER 2 |
| Material | STEEL CORROSION RESISTING AND NICKEL ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 596-7410337-A3 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| B831-9522-A3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3940-01-500-3872 is a Assy,stopblock,stbd, manufactured by Naval Sea Systems Command, classified under FSC 3940, Blocks, Tackle, Rigging, and Slings. Status: active.
NSN 3940-01-500-3872 has 1 manufacturer part number on file: 596-7410337-A3 (Naval Sea Systems Command).
Key specifications for 596-7410337-A3: Overall Height: 7.630 INCHES NOMINAL IN; Overall Length: 13.750 INCHES NOMINAL IN; Overall Width: 4.000 INCHES NOMINAL IN; Accessory Components and Quantity: BLOCK 1, STOP PAD 4, CENTER BLOCK 1, SHAFT 1, FLANGED JOURNAL BEARING 2, SQUARE KEY 1, BEARING SELF-LOCKING LOCKNUT 1, SCH CYL SELF-LOCKING CAP SCREW 10, WASHER 2. 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.
NSN 3940-01-500-3872 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.