The Latch,safety,hook, cataloged under National Stock Number 4030-01-513-0986, 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 3 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4030-01-513-0986 |
| Primary Part Number | 593-7556811 PC 73 |
| Item Name | Latch,safety,hook |
| FSC / FSG | 4030 / 40 — Fittings for Rope, Cable, and Chain |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Latch Type | DOUBLE ACTION |
| Safe Operating Load Rating | 700.000 POUNDS NOMINAL LBS |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| TC 331-RSS | Essentra Plastics Llc Dba Essentra Components (USA) |
| 593-7556811 PC 73 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| TC 331-RSS | 5/9 Secondary reference Dover Energy, Inc. Dba De-Sta-Co |
| 331-RSS | C/1 Advisory reference — outside the item-of-supply concept Dover Energy, Inc. Dba De-Sta-Co |
| 001-000216-000 | 5/9 Secondary reference Insitu, Inc. |
| 331-RSS | 3/9 Design control — primary reference Dover Resources Inc Dba De-Sta-Co Industries |
| TC 331-RSS | 5/9 Secondary reference County of Santa Cruz Dba District Attorney |
NSN 4030-01-513-0986 is a Latch,safety,hook, manufactured by Naval Sea Systems Command, classified under FSC 4030, Fittings for Rope, Cable, and Chain. Status: active.
NSN 4030-01-513-0986 has 2 manufacturer part numbers on file: TC 331-RSS (Essentra Plastics Llc Dba Essentra Components), 593-7556811 PC 73 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3444-01-568-2995, 4030-01-630-6842. Verify interchangeability with system specifications before substitution.
Key specifications for 593-7556811 PC 73: Latch Type: DOUBLE ACTION; Safe Operating Load Rating: 700.000 POUNDS NOMINAL LBS; Special Features: OVERALL WIDTH IS 1.750 IN; OVERALL HEIGHT IS 1.780 IN; RELEASE LEVER CATCH ACCESSSORY WHICH ALLOWS CLAMP TO LOCK IN CLOSED POSITION ONLY IS PROVIDED; LATCH PLATE (P/N 331005) PROVIDED; HANDLE HAS ERGONOMIC GRIP IN; Part Name Assigned by Controlling Agency: TOGGLE LOCK PLUS STAINLESS STEEL CLAMP. 3 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.