The Delay Line, cataloged under National Stock Number 5999-00-997-1685, 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 Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5999-00-997-1685 |
| Primary Part Number | 25-41B |
| Item Name | Delay Line |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil |
| Status | ACTIVE |
| Pulse Rise Time Rating | 33.3 NANOSECONDS NS |
| Signal Delay Method | INDUCTANCE |
| FSC Application Data | RADAR NONAIRBORNE,EXCEPT FIRE CONTROL AND GUIDED MISSILE |
| Section Delay Time | 500.000 NANOSECONDS NOMINAL SINGLE SECTION NS |
| Mounting Facility Quantity | 2 |
| Output Impedance Rating | 1000.000 OHMS |
| Body Style | RECTANGULAR |
| Body Width | 1.250 INCHES NOMINAL IN |
| Mounting Provision Arrangement Style | 2 POSITION IN-LINE |
| Individual Section Quantity | 1 |
| Thread Pitch Diameters | +0.1875 TO 0.1876 INCHES IN |
| Frequency Bandwidth | 10800.0 KILOHERTZ NOMINAL |
| Segment Quantity Per Section | 30 SINGLE SECTION |
| Delay Time Variation Method | TAPPED |
| Segment Delay Time | 16.700 NANOSECONDS NOMINAL SINGLE SECTION ALL SEGMENTS NS |
| Stud Length | 0.438 INCHES NOMINAL IN |
| Body Length | 6.000 INCHES NOMINAL IN |
| Input Impedance Rating | 1000.000 OHMS |
| Mounting Facility | THREADED STUD(S) |
| Terminal Type and Quantity | 30 TURRET |
| Attenuation in Decibels | 1.000 |
| Operating Temp Range | -55.0 TO 125.0 CELSIUS DEGC |
| Thread Class | 2A A |
| Body Depth | 0.750 INCHES NOMINAL IN |
| Thread Size and Series/type Designator | 0.138-32 UNIFIED NATIONAL COARSE (UNC) |
| Longest Horizontal Distance Between Mounting Centers | 4.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | J |
| Weight | 0.0300 lbs |
| Cube | 0.0318 cu ft |
| Part Number | Manufacturer |
|---|---|
| 25-41B PRIMARY | Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil (USA) |
| Reference | Meaning |
|---|---|
| 2486765 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5999-00-997-1685 is a Delay Line, manufactured by Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-00-997-1685 has 1 manufacturer part number on file: 25-41B (Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil).
Key specifications for 25-41B: Pulse Rise Time Rating: 33.3 NANOSECONDS NS; Signal Delay Method: INDUCTANCE; FSC Application Data: RADAR NONAIRBORNE,EXCEPT FIRE CONTROL AND GUIDED MISSILE; Section Delay Time: 500.000 NANOSECONDS NOMINAL SINGLE SECTION NS. 26 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.
NSN 5999-00-997-1685 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.