The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-331-7218, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Alliant Techsystems Operations Llc Div Defense Electronic Systems. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-00-331-7218 |
| Primary Part Number | 2606549-15 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Alliant Techsystems Operations Llc Div Defense Electronic Systems |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.001 TO 0.001 |
| Terminal Diameter | 0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN |
| Terminal Length | 1.500 INCHES MINIMUM IN |
| Mode of Oscillation | FUNDAMENTAL |
| Body Width | 0.402 INCHES MAXIMUM IN |
| Equivalent Resistance Value in Ohms | 175.000 MAXIMUM |
| Overall Thickness | 0.183 INCHES MAXIMUM IN |
| Style Designator | OVAL BODY, WIRE LEADS |
| Drive Level Rating | 4.0 MILLIWATTS MINIMUM AND 6.0 MILLIWATTS MAXIMUM |
| Center to Center Distance Between Terminals | 0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Load Capacitance in Picofarads | 29.5 MINIMUM AND 30.5 MAXIMUM |
| Circuit Resonance | ANTIRESONANCE |
| Operating Temp Range | +0.0 TO 75.0 CELSIUS DEGC |
| Specified Frequency | 3.1088 MEGAHERTZ |
| Body Thickness | 0.150 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 2606549-15 PRIMARY | Alliant Techsystems Operations Llc Div Defense Electronic Systems (USA) |
| HC18U3-1088MHZ | Crystek Crystals Corporation Dba Crystek Corp (USA) |
NSN 5955-00-331-7218 is a Crystal Unit,quartz, manufactured by Alliant Techsystems Operations Llc Div Defense Electronic Systems, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-00-331-7218 has 2 manufacturer part numbers on file: 2606549-15 (Alliant Techsystems Operations Llc Div Defense Electronic Systems), HC18U3-1088MHZ (Crystek Crystals Corporation Dba Crystek Corp).
Key specifications for 2606549-15: Frequency Tolerance for Operating Temp in Percent: -0.001 TO 0.001; Terminal Diameter: 0.016 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN; Terminal Length: 1.500 INCHES MINIMUM IN; Mode of Oscillation: FUNDAMENTAL. 15 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.