The Cover,access, cataloged under National Stock Number 5340-01-126-0478, 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 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-126-0478 |
| Primary Part Number | 503598 |
| 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 | 1.000 INCHES NOMINAL IN |
| Inside Width | 2.250 INCHES NOMINAL IN |
| Length | 8.880 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-5541 CL 1A MIL SPEC SINGLE TREATMENT RESPONSE A |
| Inside Length | 8.880 INCHES NOMINAL IN |
| Distance Between Holes Along Length | 2.875 INCHES NOMINAL IN |
| Flange Thickness | 0.063 INCHES NOMINAL IN |
| Inside Corner Radius | 0.060 INCHES NOMINAL IN |
| First Recess Inside Height | 2.5000 INCHES NOMINAL IN |
| Distance Between Holes Along Width | 3.437 INCHES NOMINAL IN |
| Mounting Opening Shape Style | UNTHREADED HOLE |
| Material Document and Classification | QQ-A-250/6 TH32 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | SQUARE OR RECTANGULAR RECESS |
| Features Provided | OBSERVATION FACILITY |
| Securing Device Type | SPECIAL |
| Hole Quantity Along Width | 6 |
| Distance From First Hole Centerline to End Along Length | 0.190 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE |
| Peripheral Shape Style | RECTANGLE, MULTI HOLES |
| Width | 3.250 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 5052 |
| Hole Diameter | 0.166 INCHES NOMINAL IN |
| Body Thickness | 0.063 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 |
|---|---|
| 503598 PRIMARY | Aimtron Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 503598 | 5/9 Secondary reference Cardion Inc |
NSN 5340-01-126-0478 is a Cover,access, manufactured by Aimtron Systems, Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-126-0478 has 1 manufacturer part number on file: 503598 (Aimtron Systems, Llc).
1 possible match (shared part number, not a government interchangeability claim): 3130-01-352-8386. Verify interchangeability with system specifications before substitution.
Key specifications for 503598: Distance From First Hole Centerline to End Along Width: 1.000 INCHES NOMINAL IN; Inside Width: 2.250 INCHES NOMINAL IN; Length: 8.880 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-5541 CL 1A MIL SPEC SINGLE TREATMENT RESPONSE A. 23 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.