The Crystal Unit,quartz, cataloged under National Stock Number 5955-01-020-6587, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Bliley Technologies Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-01-020-6587 |
| Primary Part Number | K509-1B |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Bliley Technologies Inc |
| Status | ACTIVE |
| Distance Between Center Terminal and Outside Terminal Centers | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Frequency Tolerance for Operating Temp in Percent | -0.001 TO 0.001 |
| Terminal Diameter | 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN |
| Second Center to Center Distance Between Terminals | 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Overall Diameter | 0.620 INCHES MAXIMUM IN |
| Terminal Length | 0.500 INCHES MINIMUM AND 0.830 INCHES MAXIMUM IN |
| Mode of Oscillation | FUNDAMENTAL |
| Equivalent Resistance Value in Ohms | 30.0 MAXIMUM |
| Style Designator | HAT TYPE, 5 WIRE LEADS |
| Diameter | 0.515 INCHES MAXIMUM IN |
| Drive Level Rating | 1.6 MILLIWATTS MINIMUM AND 2.4 MILLIWATTS MAXIMUM |
| Center to Center Distance Between Terminals | 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Load Capacitance in Picofarads | 15.5 MINIMUM AND 20.5 MAXIMUM |
| Circuit Resonance | ANTIRESONANCE |
| Shunt Capacitance in Picofarads | 4.7 MINIMUM AND 5.7 MAXIMUM |
| Operating Temp Range | -30.0 TO 65.0 CELSIUS DEGC |
| Specified Frequency | 6.880 MEGAHERTZ |
| 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 |
|---|---|
| K509-1B | Bliley Technologies Inc (USA) |
| 99-258-1B | Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled (USA) |
| Reference | Meaning |
|---|---|
| 945030-1B | 3/2 Design control — primary reference U.S. Government activity |
| C14363-1B | 5/2 Secondary reference U.S. Government activity |
NSN 5955-01-020-6587 is a Crystal Unit,quartz, manufactured by Bliley Technologies Inc, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-020-6587 has 2 manufacturer part numbers on file: K509-1B (Bliley Technologies Inc), 99-258-1B (Microsemi Corp. - High Performance Timing Dba Vectron International- Cancelled).
Key specifications for K509-1B: Distance Between Center Terminal and Outside Terminal Centers: 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Frequency Tolerance for Operating Temp in Percent: -0.001 TO 0.001; Terminal Diameter: 0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM IN; Second Center to Center Distance Between Terminals: 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN. 17 specifications are 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.