The Terminal,stud, cataloged under National Stock Number 5940-00-052-4579, 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 Lerco Div Space-Lok Inc. Government technical data includes 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5940-00-052-4579 |
| Primary Part Number | 4109B-2 |
| Item Name | Terminal,stud |
| FSC / FSG | 5940 / 59 — Lugs, Terminals, and Terminal Strips |
| Manufacturer | Lerco Div Space-Lok Inc |
| Status | ACTIVE |
| Identification Code Color | WHITE |
| Surface Treatment Document and Classification | MIL-G-45204 TYPE 1 OR 2 MIL SPEC 2ND TREATMENT RESPONSE OVERALL EXCEPT INSULATION SECOND LAYER |
| Surface Treatment Document and Classification | QQ-S-365 TYPE 3 FED SPEC 1ST TREATMENT RESPONSE OVERALL EXCEPT INSULATION FIRST LAYER |
| Minor Bushing Diameter | 0.234 INCHES IN |
| Precious Material | GOLD AND SILVER |
| Overall Diameter | 0.255 INCHES IN |
| Largest Diameter | 0.109 INCHES SINGLE END IN |
| Major Bushing Length | 0.143 INCHES IN |
| Precious Material and Weight | 0.040 GOLD GRAINS, TROY AND 0.040 SILVER GRAINS, TROY |
| Material Document and Classification | MIL-P-19468 MIL SPEC SINGLE MATERIAL RESPONSE INSULATION |
| Material Document and Classification | QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSULATION |
| Basic Shape Style | NONTUBULAR, ROUND |
| Mounting Method Style | RIVET |
| Electrical Insulation Feature | INSULATING MOUNTING BUSHING |
| Terminal Length | 0.283 INCHES IN |
| Conductor Accommodation Type | DOUBLE TURRET SINGLE END |
| Surface Treatment | SILVER OVERALL EXCEPT INSULATION FIRST LAYER |
| Surface Treatment | GOLD OVERALL EXCEPT INSULATION SECOND LAYER |
| Precious Material and Location | 1ST LAYER CONDUCTOR ACCOMMODATION SILVER AND 2ND LAYER CONDUCTOR ACCOMMODATION GOLD |
| Major Bushing Diameter | 0.255 INCHES IN |
| Turret Minor Diameter | 0.078 INCHES SINGLE END IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE INSULATION |
| Material | COPPER ALLOY OVERALL EXCEPT INSULATION |
| 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 |
|---|---|
| 4109B-2 | Lerco Div Space-Lok Inc (USA) |
| Reference | Meaning |
|---|---|
| 4447B9 | 3/2 Design control — primary reference U.S. Government activity |
| 4447B | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5940-00-052-4579 is a Terminal,stud, manufactured by Lerco Div Space-Lok Inc, classified under FSC 5940, Lugs, Terminals, and Terminal Strips. Status: active.
NSN 5940-00-052-4579 has 1 manufacturer part number on file: 4109B-2 (Lerco Div Space-Lok Inc).
Key specifications for 4109B-2: Identification Code Color: WHITE; Surface Treatment Document and Classification: MIL-G-45204 TYPE 1 OR 2 MIL SPEC 2ND TREATMENT RESPONSE OVERALL EXCEPT INSULATION SECOND LAYER; Surface Treatment Document and Classification: QQ-S-365 TYPE 3 FED SPEC 1ST TREATMENT RESPONSE OVERALL EXCEPT INSULATION FIRST LAYER; Minor Bushing Diameter: 0.234 INCHES IN. 23 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.