The Filter,band Pass, cataloged under National Stock Number 5915-00-034-1031, is classified within Federal Supply Class 5915 (Filters and Networks) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5915-00-034-1031 |
| Primary Part Number | BPF21-4-4000-3 |
| Item Name | Filter,band Pass |
| FSC / FSG | 5915 / 59 — Filters and Networks |
| Manufacturer | Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc |
| Status | ACTIVE |
| Reference Frequency Per Function | 21.4 MEGAHERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED |
| Inclosure Type | ENCASED |
| Source Impedance Rating Per Function | 300.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED |
| Body Material | METAL |
| Input Impedance Per Function W/load | 300.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED |
| Principal Circuitry Type Per Function | INDUCTANCE-CAPACITANCE BLANK LOCATION NOT OTHERWISE SPECIFIED |
| Frequency Band Width Per Function | 19.40 MEGAHERTZ BLANK AND 23.40 MEGAHERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED |
| Insertion Loss at Reference Frequency Per Function in Decibels | 3.0 BLANK LOCATION NOT OTHERWISE SPECIFIED |
| Output Impedance Per Function W/source Across Input | 300.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED |
| Load Impedance Per Function | 300.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED |
| 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 |
|---|---|
| BPF21-4-4000-3 PRIMARY | Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc (USA) |
| Reference | Meaning |
|---|---|
| BPF21-4-4000-3 | 3/9 Design control — primary reference Aiken Advanced Systems Inc a Div of Amstar Technical Products Inc an Affil of Amstar Corp |
NSN 5915-00-034-1031 is a Filter,band Pass, manufactured by Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc, classified under FSC 5915, Filters and Networks. Status: active.
NSN 5915-00-034-1031 has 1 manufacturer part number on file: BPF21-4-4000-3 (Technical Services Laboratory, Inc. Dba Technical Services Laboratory Inc).
Key specifications for BPF21-4-4000-3: Reference Frequency Per Function: 21.4 MEGAHERTZ BLANK LOCATION NOT OTHERWISE SPECIFIED; Inclosure Type: ENCASED; Source Impedance Rating Per Function: 300.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED; Body Material: METAL. 10 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.