The Time Delay, cataloged under National Stock Number 5815-00-021-1897, is classified within Federal Supply Class 5815 (Teletype and Facsimile Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Telemechanics Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5815-00-021-1897 |
| Primary Part Number | 153801 |
| Item Name | Time Delay |
| FSC / FSG | 5815 / 58 — Teletype and Facsimile Equipment |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| FSC Application Data | TELETYPE AND FACSIMILE EQUIPMENT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 153801 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 153801 | 5/9 Secondary reference American Telephone and Telegraph Co |
| 153801 | 5/9 Secondary reference At and T Corp |
NSN 5815-00-021-1897 is a Time Delay, manufactured by Telemechanics Inc, classified under FSC 5815, Teletype and Facsimile Equipment. Status: active.
NSN 5815-00-021-1897 has 1 manufacturer part number on file: 153801 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-204-6964. Verify interchangeability with system specifications before substitution.
Key specifications for 153801: FSC Application Data: TELETYPE AND FACSIMILE EQUIPMENT. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.