The Cover,access, cataloged under National Stock Number 5340-01-266-1087, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Aljo Precision Products, Inc.. Government technical data includes 19 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-266-1087 |
| Primary Part Number | 128WM10042-13 |
| Item Name | Cover,access |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Aljo Precision Products, Inc. |
| Status | ACTIVE |
| Distance From First Hole Centerline to End Along Width | 0.469 INCHES NOMINAL IN |
| Inside Width | 3.240 INCHES NOMINAL IN |
| Length | 5.874 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | GSS9.010,GRUMMAN AIRCRAFT MFR REF SINGLE TREATMENT RESPONSE |
| Inside Length | 3.740 INCHES NOMINAL IN |
| Distance Between Holes Along Length | 0.914 INCHES NOMINAL IN |
| Flange Thickness | 1.067 INCHES NOMINAL IN |
| First Recess Inside Height | 0.060 INCHES NOMINAL IN |
| Distance Between Holes Along Width | 1.466 INCHES NOMINAL IN |
| Mounting Opening Shape Style | UNTHREADED HOLE |
| Material Document and Classification | QQ-A-250/12,T6 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECESS, OTHER THAN ROUND |
| Securing Device Type | SPECIAL |
| Distance From First Hole Centerline to End Along Length | 0.594 INCHES NOMINAL IN |
| Distance Between Hole Centerline and First Hole Along Width | 1.146 INCHES NOMINAL IN |
| Surface Treatment | PRIMER ZINC CHROMATE |
| Width | 5.374 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 7075 |
| Hole Diameter | 0.057 INCHES MINIMUM AND 0.062 INCHES MAXIMUM 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 |
|---|---|
| 128WM10042-13 PRIMARY | Aljo Precision Products, Inc. (USA) |
| 128WM10042-13 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 128WM10042-13 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5340-01-266-1087 is a Cover,access, manufactured by Aljo Precision Products, Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-266-1087 has 2 manufacturer part numbers on file: 128WM10042-13 (Aljo Precision Products, Inc.), 128WM10042-13 (Northrop Grumman Systems Corporation).
Key specifications for 128WM10042-13: Distance From First Hole Centerline to End Along Width: 0.469 INCHES NOMINAL IN; Inside Width: 3.240 INCHES NOMINAL IN; Length: 5.874 INCHES NOMINAL IN; Surface Treatment Document and Classification: GSS9.010,GRUMMAN AIRCRAFT MFR REF SINGLE TREATMENT RESPONSE. 19 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 5340-01-266-1087 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.