The Coil,telephone, cataloged under National Stock Number 5950-00-645-4560, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lucent Technologies Inc Corporate Headquarters. Government technical data includes 19 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-645-4560 |
| Primary Part Number | BL109728TYPE173C |
| Item Name | Coil,telephone |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Lucent Technologies Inc Corporate Headquarters |
| Status | ACTIVE |
| Mounting Facility Quantity | 2 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Mounting Method | THREADED STUD(S) SINGLE GROUP |
| Body Width | 1.719 INCHES NOMINAL IN |
| Body Height | 4.938 INCHES NOMINAL IN |
| Distance Between Mounting Facility Centers | 2.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Nominal Thread Size | 0.164 INCHES SINGLE GROUP IN |
| Body Length | 3.125 INCHES NOMINAL IN |
| DC Resistance Rating in Ohms | 18.000 SINGLE COMPONENT FIRST WINDING |
| DC Resistance Rating in Ohms | 18.000 SINGLE COMPONENT SECOND WINDING |
| DC Resistance Rating in Ohms | 27.000 SINGLE COMPONENT FIFTH TERTIARY |
| DC Resistance Rating in Ohms | 27.000 SINGLE COMPONENT FIFTH WINDING |
| DC Resistance Rating in Ohms | 27.000 SINGLE COMPONENT FOURTH WINDING |
| DC Resistance Rating in Ohms | 27.000 SINGLE COMPONENT THIRD WINDING |
| Reliability Indicator | NOT ESTABLISHED |
| Winding Quantity | 6 SINGLE COMPONENT |
| Thread Quantity Per Inch | 32 SINGLE GROUP |
| Terminal Type and Quantity | 6 TAB, SOLDER LUG |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| BL109728TYPE173C PRIMARY | Lucent Technologies Inc Corporate Headquarters (USA) |
| Reference | Meaning |
|---|---|
| BL109728TYPE173C | 5/9 Secondary reference Lucent Technologies Inc Dba Federal Marketing Group |
| D162037C | C/1 Advisory reference — outside the item-of-supply concept Lucent Technologies Inc Corporate Headquarters |
| D162037C | 5/9 Secondary reference Lucent Technologies Inc Dba Federal Marketing Group |
| BL109728TYPE173C | 3/9 Design control — primary reference American Telephone and Telegraph Co |
| D162037C | 5/9 Secondary reference American Telephone and Telegraph Co |
| BL109728TYPE173C | 5/9 Secondary reference At and T Corp |
NSN 5950-00-645-4560 is a Coil,telephone, manufactured by Lucent Technologies Inc Corporate Headquarters, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-645-4560 has 1 manufacturer part number on file: BL109728TYPE173C (Lucent Technologies Inc Corporate Headquarters).
Key specifications for BL109728TYPE173C: Mounting Facility Quantity: 2 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Mounting Method: THREADED STUD(S) SINGLE GROUP; Body Width: 1.719 INCHES NOMINAL IN. 19 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.