The Hook,chain,s, cataloged under National Stock Number 4030-01-486-7727, is classified within Federal Supply Class 4030 (Fittings for Rope, Cable, and Chain) of the Rope, Cable, Chain, and Fittings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4030-01-486-7727 |
| Primary Part Number | 580-6641123-3015 |
| Item Name | Hook,chain,s |
| FSC / FSG | 4030 / 40 — Fittings for Rope, Cable, and Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Inside Length | 1.900 INCHES NOMINAL IN |
| Material Diameter | 0.250 INCHES NOMINAL IN |
| Style Designator | OPEN ENDS |
| Material Document and Classification | QQ-S-763, CL-304, COND-B FED SPEC SINGLE MATERIAL RESPONSE |
| Lower Loop Inside Diameter | 0.600 INCHES NOMINAL IN |
| Upper Loop Inside Diameter | 0.600 INCHES NOMINAL IN |
| Material | STEEL COMP 304 |
| 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 |
|---|---|
| 580-6641123-ECHG-B2-43 | Naval Sea Systems Command (USA) |
| 580-6641123-3015 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6641123 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4030-01-486-7727 is a Hook,chain,s, manufactured by Naval Sea Systems Command, classified under FSC 4030, Fittings for Rope, Cable, and Chain. Status: active.
NSN 4030-01-486-7727 has 2 manufacturer part numbers on file: 580-6641123-ECHG-B2-43 (Naval Sea Systems Command), 580-6641123-3015 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-492-4607. Verify interchangeability with system specifications before substitution.
Key specifications for 580-6641123-3015: Inside Length: 1.900 INCHES NOMINAL IN; Material Diameter: 0.250 INCHES NOMINAL IN; Style Designator: OPEN ENDS; Material Document and Classification: QQ-S-763, CL-304, COND-B FED SPEC SINGLE MATERIAL RESPONSE. 7 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.