The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-812-0973, is classified within Federal Supply Class 5955 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Wenzel International Inc Div Croven Crystals. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-00-812-0973 |
| Primary Part Number | B251-10-8 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — No Item Name Available |
| Manufacturer | Wenzel International Inc Div Croven Crystals |
| Status | ACTIVE |
| Overall Thickness | 0.183 INCHES MAXIMUM IN |
| Style Designator | TUBE BODY, WIRE LEADS |
| Material | GLASS COVER HOLDER |
| Frequency Tolerance for Operating Temp in Percent | -0.005 TO 0.005 AND -0.0010 TO 0.0010 |
| Center to Center Distance Between Terminals | 0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Drive Level Rating | 2.0 MILLIWATTS NOMINAL AND 1.0 MILLIWATTS MINIMUM AND 2.4 MILLIWATTS MAXIMUM |
| Equivalent Resistance Value in Ohms | 30.0 MAXIMUM |
| Mode of Oscillation | THIRD OVERTONE AND FIFTH OVERTONE |
| Terminal Length | 0.250 INCHES MAXIMUM IN |
| Operating Temp Range | +0.0 TO 75.0 CELSIUS DEGC |
| Circuit Resonance | SERIES RESONANCE |
| Body Thickness | 0.150 INCHES MAXIMUM IN |
| Body Length | 0.530 INCHES MAXIMUM IN |
| Specified Frequency | 52.9166 MEGAHERTZ |
| Body Width | 0.402 INCHES MAXIMUM IN |
| Terminal Diameter | 0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| B251-10-8 PRIMARY | Wenzel International Inc Div Croven Crystals (CAN) |
| U4-NS-8 | United States Crystal Corp (USA) |
| 1011-8 | Astro Crystal (USA) |
| 4400B0620-8 | Lockheed Corp Lockheed Electronics Co Inc (USA) |
| 4400B0620-8 | Northrop Grumman Systems Corporation (USA) |
NSN 5955-00-812-0973 is a Crystal Unit,quartz, manufactured by Wenzel International Inc Div Croven Crystals, classified under FSC 5955 (No Item Name Available). Status: active.
NSN 5955-00-812-0973 has 5 cross-referenced part numbers: B251-10-8 (Wenzel International Inc Div Croven Crystals), U4-NS-8 (United States Crystal Corp), 1011-8 (Astro Crystal), 4400B0620-8 (Lockheed Corp Lockheed Electronics Co Inc), 4400B0620-8 (Northrop Grumman Systems Corporation).
There are 12 known substitutes for 5955-00-812-0973: 4820-00-036-1958, 5133-00-228-1398, 5133-00-228-1409 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for B251-10-8: Overall Width: 0.435 INCHES MAXIMUM IN; Overall Thickness: 0.183 INCHES MAXIMUM IN; Style Designator: TUBE BODY, WIRE LEADS; Material: GLASS COVER HOLDER. 18 total characteristics are documented in the Federal Logistics Information System.