The Relay-Switch, cataloged under National Stock Number 5999-01-428-2267, is classified within Federal Supply Class 5999 (Miscellaneous Electrical and Electronic Components) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Leach International Corp Div Leach International Corporation. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5999-01-428-2267 |
| Primary Part Number | YL-D4A-011 |
| Item Name | Relay-Switch |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Leach International Corp Div Leach International Corporation |
| Status | ACTIVE |
| Contact Current Type | AC OR DC |
| Contact Form Arrangement | 2C |
| Inclosure Material | ALUMINUM ALLOY |
| Operating Current in Amps | 5.0 NOMINAL |
| Current Rating at Maximum Rated Voltage | 5.0 AMPERES NOMINAL |
| Contact Arrangement | 2SPDT |
| Voltage Rating at Maximum Rated Current | 28.0 VOLTS |
| Continuous Load Frequency Rating | 400.0 HERTZ NOMINAL |
| Inclosure Surface Treatment | PAINT |
| Operating Voltage in Volts | 28.0 MINIMUM |
| Switch Type | RELAY |
| Action Type | INSTANTANEOUS |
| Maximum DC Resistance in Ohms | 600.0 |
| Relay Type | RELAY-SWITCH |
| Mounting Configuration | ONE HOLE AA0.130 ON ONE SIDE AND TWO HOLES AA0.130 ON THE OTHER SIDE |
| Maximum Voltage Rating in Volts | 200.0 |
| Noninductive Winding Quantity | 2 |
| Coil Current Type | AC OR DC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | CC |
| Part Number | Manufacturer |
|---|---|
| YL-D4A-011 PRIMARY | Leach International Corp Div Leach International Corporation (USA) |
| Reference | Meaning |
|---|---|
| M6106/39-002 | 5/2 Secondary reference U.S. Government activity |
NSN 5999-01-428-2267 is a Relay-Switch, manufactured by Leach International Corp Div Leach International Corporation, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-428-2267 has 1 manufacturer part number on file: YL-D4A-011 (Leach International Corp Div Leach International Corporation).
Key specifications for YL-D4A-011: Contact Current Type: AC OR DC; Overall Height: 0.640 INCHES NOMINAL IN; Contact Form Arrangement: 2C; Inclosure Material: ALUMINUM ALLOY. 18 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.