The Cover,access, cataloged under National Stock Number 5340-01-273-9506, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Ducommun Aerostructures New York, Inc. Dba Ducommun Aerostructures New York Inc Div Ducommun Aerostructures. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-273-9506 |
| Primary Part Number | 16B4508-9 |
| Item Name | Cover,access |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Ducommun Aerostructures New York, Inc. Dba Ducommun Aerostructures New York Inc Div Ducommun Aerostructures |
| Status | ACTIVE |
| Bolt Circle Hole Quantity | 6 |
| Cross-Sectional Shape Style | FLAT |
| Outside Diameter | 5.060 INCHES NOMINAL IN |
| Securing Device Type | THREADED FASTENER |
| Bolt Circle Diameter | 4.374 INCHES NOMINAL IN |
| Peripheral Shape Style | ROUND, MULTI HOLES |
| Material | ALUMINUM ALLOY |
| Body Thickness | 0.071 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 16B4508-9 | Ducommun Aerostructures New York, Inc. Dba Ducommun Aerostructures New York Inc Div Ducommun Aerostructures (USA) |
| Reference | Meaning |
|---|---|
| 16B4508-9 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-273-9506 is a Cover,access, manufactured by Ducommun Aerostructures New York, Inc. Dba Ducommun Aerostructures New York Inc Div Ducommun Aerostructures, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-273-9506 has 1 manufacturer part number on file: 16B4508-9 (Ducommun Aerostructures New York, Inc. Dba Ducommun Aerostructures New York Inc Div Ducommun Aerostructures).
Key specifications for 16B4508-9: Bolt Circle Hole Quantity: 6; Cross-Sectional Shape Style: FLAT; Outside Diameter: 5.060 INCHES NOMINAL IN; Securing Device Type: THREADED FASTENER. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5340-01-273-9506 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.