The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-00-843-0744, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-00-843-0744 |
| Primary Part Number | ADCH4 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division |
| Status | ACTIVE |
| Design Type | FRICTION |
| Overall Diameter | 1.000 INCHES NOMINAL IN |
| Connector Nominal Thread Size for Which Designed | 0.250 INCHES IN |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM |
| Inside Diameter Length | 0.250 INCHES NOMINAL IN |
| Round Cap Outside Surface Condition | KNURLED |
| 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 |
|---|---|
| 21C1711-21 | General Electric Company (USA) |
| ADCH4 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division (USA) |
| Reference | Meaning |
|---|---|
| 21C2200-611 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| SM-A-949408-3 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-00-843-0744 is a Cap,protective,dust and Moisture, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-843-0744 has 2 manufacturer part numbers on file: 21C1711-21 (General Electric Company), ADCH4 (Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division).
Key specifications for ADCH4: Design Type: FRICTION; Overall Diameter: 1.000 INCHES NOMINAL IN; Connector Nominal Thread Size for Which Designed: 0.250 INCHES IN; Special Features: 10 IN. LG BRASS BEAD CHAIN ATTACHED TO CAP IN. 7 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.