The Terminal,stud, cataloged under National Stock Number 5940-00-666-3859, is classified within Federal Supply Class 5940 (Lugs, Terminals, and Terminal Strips) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Staffall, Inc. Dba Staffall Inc. Government technical data includes 19 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5940-00-666-3859 |
| Primary Part Number | DL1-3550-20-CT-CI |
| Item Name | Terminal,stud |
| FSC / FSG | 5940 / 59 — Lugs, Terminals, and Terminal Strips |
| Manufacturer | Staffall, Inc. Dba Staffall Inc |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES IN |
| Overall Diameter | 0.150 INCHES IN |
| Largest Diameter | 0.083 INCHES SINGLE END IN |
| Thread Length | 0.156 INCHES IN |
| Basic Shape Style | NONTUBULAR, ROUND |
| Mounting Method Style | STUD |
| Mounting Thread Quantity | 40 PER INCH |
| Electrical Insulation Feature | STANDOFF INSULATION |
| Terminal Length | 0.312 INCHES IN |
| Dry Flashover Voltage Rating in Volts | 3500.0 |
| Conductor Accommodation Type | DOUBLE TURRET SINGLE END |
| Surface Treatment | TIN CONDUCTOR ACCOMMODATION FIRST LAYER |
| Surface Treatment | ZINC CONDUCTOR ACCOMMODATION SECOND LAYER |
| Mounting Thread Diameter | 0.122 INCHES IN |
| Turret Minor Diameter | 0.062 INCHES SINGLE END IN |
| Material | COPPER ALLOY MOUNTING FACILITY |
| Material | PLASTIC PHENOLIC INSULATION |
| Material | COPPER ALLOY CONDUCTOR ACCOMMODATION |
| Mounting Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| DL1-3550-20-CT-CI PRIMARY | Staffall, Inc. Dba Staffall Inc (USA) |
| Reference | Meaning |
|---|---|
| M3550-20 | 5/9 Secondary reference Staffall, Inc. Dba Staffall Inc |
| 476648-1 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
| 476648-1 | 5/9 Secondary reference Rca Corp Distributor and Special Products Div |
NSN 5940-00-666-3859 is a Terminal,stud, manufactured by Staffall, Inc. Dba Staffall Inc, classified under FSC 5940, Lugs, Terminals, and Terminal Strips. Status: active.
NSN 5940-00-666-3859 has 1 manufacturer part number on file: DL1-3550-20-CT-CI (Staffall, Inc. Dba Staffall Inc).
Key specifications for DL1-3550-20-CT-CI: Width Across Flats: 0.156 INCHES IN; Overall Diameter: 0.150 INCHES IN; Largest Diameter: 0.083 INCHES SINGLE END IN; Thread Length: 0.156 INCHES IN. 19 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.