The Lock Ring, cataloged under National Stock Number 2040-00-896-6591, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2040-00-896-6591 |
| Primary Part Number | A547-659 |
| Item Name | Lock Ring |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL,STEEL,MIL-T-8506,CL 304 FINISH PASSIVATE; 63 MICROINCH ALL SURFACES; 1.625 IN. OD; 0.250 THK IN |
| 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 |
|---|---|
| 003100 | L3 Technologies, Inc. Div L3 Keo (USA) |
| A547-659 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| Reference | Meaning |
|---|---|
| 547A003100 | 5/9 Secondary reference Chatham Precision Inc |
| 547A003100 | C/1 Advisory reference — outside the item-of-supply concept L3 Technologies, Inc. Div L3 Keo |
| A547-659 | 5/9 Secondary reference Chatham Precision Inc |
| 003100 | 5/9 Secondary reference Chatham Precision Inc |
| 547A003100 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A-547.659 | C/1 Advisory reference — outside the item-of-supply concept L3 Technologies, Inc. Div L3 Keo |
NSN 2040-00-896-6591 is a Lock Ring, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-00-896-6591 has 2 manufacturer part numbers on file: 003100 (L3 Technologies, Inc. Div L3 Keo), A547-659 (L3 Technologies, Inc. Div L3 Keo).
Key specifications for A547-659: General Characteristics Item Description: MATERIAL,STEEL,MIL-T-8506,CL 304 FINISH PASSIVATE; 63 MICROINCH ALL SURFACES; 1.625 IN. OD; 0.250 THK IN. 1 specification is 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.