The Ring,stop,plunger, cataloged under National Stock Number 3960-01-391-3843, is classified within Federal Supply Class 3960 (Freight Elevators) of the Materials Handling Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3960-01-391-3843 |
| Primary Part Number | 803-6397420-86 |
| Item Name | Ring,stop,plunger |
| FSC / FSG | 3960 / 39 — Freight Elevators |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Overall Diameter | 1.875 INCHES NOMINAL IN |
| General Characteristics Item Description | BAR 01-7/8 X 1-1/8IN.LG; SST TY 316 ASTM A276; I.D. 1.162IN.DIA IN |
| Material | STEEL |
| 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 |
|---|---|
| 803-6397420 PIECE 86 | Naval Sea Systems Command (USA) |
| 803-6397420-86 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-6397420 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3960-01-391-3843 is a Ring,stop,plunger, manufactured by Naval Sea Systems Command, classified under FSC 3960, Freight Elevators. Status: active.
NSN 3960-01-391-3843 has 2 manufacturer part numbers on file: 803-6397420 PIECE 86 (Naval Sea Systems Command), 803-6397420-86 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3010-01-391-3983, 5340-01-413-4579. Verify interchangeability with system specifications before substitution.
Key specifications for 803-6397420-86: Overall Diameter: 1.875 INCHES NOMINAL IN; General Characteristics Item Description: BAR 01-7/8 X 1-1/8IN.LG; SST TY 316 ASTM A276; I.D. 1.162IN.DIA IN; Overall Width: 0.750 INCHES NOMINAL IN; Special Features: TWO HOLES DRILLED THRU 0.439IN.DIA LOCATED 180.0DEGREE APART; USED ON TRUCK GUARD, LATCH FACILITY IN. 3 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.