The Cap,filler Opening, cataloged under National Stock Number 5340-00-497-7843, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Dresser, Llc. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5340-00-497-7843 |
| Primary Part Number | Y18742 |
| Item Name | Cap,filler Opening |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Dresser, Llc |
| Status | ACTIVE |
| Accommodation Type | LOBES END GRIPPING |
| Style Designator | CLOSED COOLING SYSTEM TYPE |
| Filler Neck Diameter for Which Designed | 1.625 INCHES NOMINAL IN |
| Outside Diameter | 3.125 INCHES NOMINAL IN |
| Cam Quantity | 2 |
| System for Which Designed | PRESSURIZED |
| Pressure Relief Method | AUTOMATIC |
| Surface Treatment | CADMIUM OVERALL |
| Maximum Working Pressure | 7.000 POUNDS PER SQUARE INCH (PSI) LBS |
| Special Markings | 7 LBS LBS |
| Material | STEEL OVERALL |
| Sealing Length | 0.875 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 |
NSN 5340-00-497-7843 is a Cap,filler Opening, manufactured by Dresser, Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-497-7843 has 2 manufacturer part numbers on file: Y18742 (Dresser, Llc), G13542 (Thermal Engineering International (usa) Inc.).
Key specifications for Y18742: Overall Height: 1.375 INCHES NOMINAL IN; Accommodation Type: LOBES END GRIPPING; Style Designator: CLOSED COOLING SYSTEM TYPE; Filler Neck Diameter for Which Designed: 1.625 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.