The Cover,access, cataloged under National Stock Number 5340-00-423-9618, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 13 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-423-9618 |
| Primary Part Number | 5B5590 |
| Item Name | Cover,access |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Corner Radius | 0.440 INCHES NOMINAL IN |
| Length | 6.458 INCHES NOMINAL IN |
| Bolt Circle Hole Quantity | 3 |
| Distance Between Holes Along Width | 3.625 INCHES NOMINAL IN |
| Mounting Opening Shape Style | UNTHREADED HOLE |
| Cross-Sectional Shape Style | FLAT |
| Securing Device Type | THREADED FASTENER |
| Distance Between Hole Centerline and First Hole Along Width | 5.578 INCHES NOMINAL IN |
| Peripheral Shape Style | IRREGULAR PENTAGON, THREE HOLES |
| Width | 5.036 INCHES NOMINAL IN |
| Material | STEEL |
| Hole Diameter | 0.531 INCHES NOMINAL IN |
| Body Thickness | 0.359 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 5B5590 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5340-00-423-9618 is a Cover,access, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-423-9618 has 1 manufacturer part number on file: 5B5590 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 5B5590: Corner Radius: 0.440 INCHES NOMINAL IN; Length: 6.458 INCHES NOMINAL IN; Bolt Circle Hole Quantity: 3; Distance Between Holes Along Width: 3.625 INCHES NOMINAL IN. 13 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.
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.