The Heater,thermal Release, cataloged under National Stock Number 5999-00-503-1964, 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 Ward Leonard Ct Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5999-00-503-1964 |
| Primary Part Number | 81D918 |
| Item Name | Heater,thermal Release |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Ward Leonard Ct Llc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) |
| Mounting Hole Diameter | 0.188 INCHES NOMINAL IN |
| Current Rating for Which Designed | 1.8 AMPERES MINIMUM AND 1.9 AMPERES MAXIMUM |
| 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 | Z |
| Weight | 0.2000 lbs |
| Cube | 0.0153 cu ft |
| Part Number | Manufacturer |
|---|---|
| 81D918 PRIMARY | Ward Leonard Ct Llc (USA) |
| 81D918 PRIMARY | General Electric Company Dba Ge (USA) |
| Reference | Meaning |
|---|---|
| 81D918 | C/1 Advisory reference — outside the item-of-supply concept General Electric Co Switchgear and Control Division of Apparatus Group |
NSN 5999-00-503-1964 is a Heater,thermal Release, manufactured by Ward Leonard Ct Llc, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-00-503-1964 has 2 manufacturer part numbers on file: 81D918 (Ward Leonard Ct Llc), 81D918 (General Electric Company Dba Ge).
Key specifications for 81D918: Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S); Overall Height: 1.688 INCHES NOMINAL IN; Mounting Hole Diameter: 0.188 INCHES NOMINAL IN; Overall Length: 1.844 INCHES NOMINAL IN. 3 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.