The Springs,primary and Secondary, cataloged under National Stock Number 4220-00-377-0658, is classified within Federal Supply Class 4220 (Marine Lifesaving and Diving Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4220-00-377-0658 |
| Item Name | Springs,primary and Secondary |
| FSC / FSG | 4220 / 42 — Marine Lifesaving and Diving Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | PRIMARY IS 1.625 IN. LENGTH,0.500 IN. DIA,0.0184 IN. DIA WIRE,9 COILS,8 ACTIVE COILS,GROUND AND SQUARED,SECONDARY IS 1.000 IN. LENGTH,0.531 IN. DIA,0.0405 IN. DIA WIRE,6-1/2 COILS,5-1/2 ACTIVE COILS,GROUND AND SQUARED IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| S9400-921580PCS 84 AND 83 | 5/9 Secondary reference Naval Sea Systems Command |
| 921580 PC 83 & 84 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4220-00-377-0658 is a Springs,primary and Secondary, classified under FSC 4220, Marine Lifesaving and Diving Equipment. Status: active.
Key specifications for 4220-00-377-0658: General Characteristics Item Description: PRIMARY IS 1.625 IN. LENGTH,0.500 IN. DIA,0.0184 IN. DIA WIRE,9 COILS,8 ACTIVE COILS,GROUND AND SQUARED,SECONDARY IS 1.000 IN. LENGTH,0.531 IN. DIA,0.0405 IN. DIA WIRE,6-1/2 COILS,5-1/2 ACTIVE COILS,GROUND AND SQUARED IN. 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.
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.