The Crystal Unit, cataloged under National Stock Number 4935-01-121-1921, is classified within Federal Supply Class 4935 (Guided Missile Maintenance, Repair, and Checkout Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is S. W. Electronics & Manufacturing Corp. Dba Swemco. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4935-01-121-1921 |
| Primary Part Number | C0236-1-10KHZ |
| Item Name | Crystal Unit |
| FSC / FSG | 4935 / 49 — Guided Missile Maintenance, Repair, and Checkout Specialized Equipment |
| Manufacturer | S. W. Electronics & Manufacturing Corp. Dba Swemco |
| Status | ACTIVE |
| General Characteristics Item Description | 0.01 HZ THRU 10 MHZ FREQUENCY,END ITEM: 4935-01-070-3426 MHz |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| C0236-1-10KHZ PRIMARY | S. W. Electronics & Manufacturing Corp. Dba Swemco (USA) |
| Reference | Meaning |
|---|---|
| 457-5503 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 4935-01-121-1921 is a Crystal Unit, manufactured by S. W. Electronics & Manufacturing Corp. Dba Swemco, classified under FSC 4935, Guided Missile Maintenance, Repair, and Checkout Specialized Equipment. Status: active.
NSN 4935-01-121-1921 has 1 manufacturer part number on file: C0236-1-10KHZ (S. W. Electronics & Manufacturing Corp. Dba Swemco).
Key specifications for C0236-1-10KHZ: General Characteristics Item Description: 0.01 HZ THRU 10 MHZ FREQUENCY,END ITEM: 4935-01-070-3426 MHz. 1 specification is 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.
NSN 4935-01-121-1921 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.