The Cover,access, cataloged under National Stock Number 5340-01-181-8039, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Aimtron Systems, Llc. Government technical data includes 21 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-181-8039 |
| Primary Part Number | 503443 |
| Item Name | Cover,access |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Aimtron Systems, Llc |
| Status | ACTIVE |
| Distance From First Hole Centerline to End Along Width | 1.937 INCHES MINIMUM AND 2.625 INCHES MAXIMUM IN |
| Inside Width | 3.250 INCHES NOMINAL IN |
| Corner Radius | 0.250 INCHES NOMINAL IN |
| Length | 6.469 INCHES MINIMUM AND 6.531 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | 0967-052-8280,FSCM 80064 MFR REF SINGLE TREATMENT RESPONSE |
| Inside Length | 4.500 INCHES NOMINAL IN |
| Flange Thickness | 0.188 INCHES NOMINAL IN |
| First Recess Inside Height | 2.750 INCHES NOMINAL IN |
| Distance Between Hole Centerline and First Hole Along Length | 2.906 INCHES NOMINAL IN |
| Mounting Opening Shape Style | UNTHREADED HOLE |
| Material Document and Classification | QQ-A-601 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | SQUARE OR RECTANGULAR RECESS |
| Securing Device Type | THREADED FASTENER |
| Distance From First Hole Centerline to End Along Length | 2.562 INCHES MINIMUM AND 3.250 INCHES MAXIMUM IN |
| Distance Between Hole Centerline and First Hole Along Width | 2.281 INCHES NOMINAL IN |
| Surface Treatment | PAINT |
| Peripheral Shape Style | RECTANGLE, EIGHT HOLES |
| Width | 5.219 INCHES MINIMUM AND 5.281 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 356.0 |
| Hole Diameter | 0.437 INCHES NOMINAL IN |
| Body Thickness | 0.250 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 |
|---|---|
| 503443 PRIMARY | Aimtron Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 503443 | 5/9 Secondary reference Cardion Inc |
| 5342PL1378115 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5340-01-181-8039 is a Cover,access, manufactured by Aimtron Systems, Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-181-8039 has 1 manufacturer part number on file: 503443 (Aimtron Systems, Llc).
Key specifications for 503443: Distance From First Hole Centerline to End Along Width: 1.937 INCHES MINIMUM AND 2.625 INCHES MAXIMUM IN; Inside Width: 3.250 INCHES NOMINAL IN; Corner Radius: 0.250 INCHES NOMINAL IN; Length: 6.469 INCHES MINIMUM AND 6.531 INCHES MAXIMUM IN. 21 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.