The Cap,filler Opening, cataloged under National Stock Number 5340-01-288-0790, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 12 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 | 5340-01-288-0790 |
| Primary Part Number | 5191951 |
| Item Name | Cap,filler Opening |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-STD-1303,SYSTEM NO.76 MIL STD SINGLE TREATMENT RESPONSE BODY |
| Accommodation Type | HEXAGON END GRIPPING |
| Thread Length | 0.960 INCHES NOMINAL IN |
| Style Designator | THREADED TYPE EXTERNAL |
| Filler Neck Diameter for Which Designed | 2.150 INCHES NOMINAL IN |
| Thread Diameter | 2.000 INCHES NOMINAL IN |
| Features Provided | BREATHER HOLE |
| System for Which Designed | NONPRESSURIZED |
| Color | YELLOW |
| Surface Treatment | PAINT BODY |
| Material | STEEL COMP 1018 OR STEEL COMP 1022 OVERALL |
| Thread Series Designator | NPT |
| 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 |
|---|---|
| 5191951 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5340-01-288-0790 is a Cap,filler Opening, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-288-0790 has 1 manufacturer part number on file: 5191951 (Naval Sea Systems Command).
Key specifications for 5191951: Overall Height: 1.340 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-STD-1303,SYSTEM NO.76 MIL STD SINGLE TREATMENT RESPONSE BODY; Accommodation Type: HEXAGON END GRIPPING; Thread Length: 0.960 INCHES NOMINAL IN. 12 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.