The Terminal,lug, cataloged under National Stock Number 5940-01-043-9959, 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 Brainin-Advance Industries, Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5940-01-043-9959 |
| Primary Part Number | 4021-12 |
| Item Name | Terminal,lug |
| FSC / FSG | 5940 / 59 — Lugs, Terminals, and Terminal Strips |
| Manufacturer | Brainin-Advance Industries, Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL SINGLE LAYER |
| Mounting Facility Thickness | 0.016 INCHES IN |
| Mounting Hole Diameter | 0.221 INCHES IN |
| Material Document and Classification | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Maximum Conductor Size Accommodated | 10 AWG |
| Basic Shape Style | SOLDER |
| Mounting Method Style | RING |
| Electrical Insulation Feature | UNINSULATED |
| Conductor Accommodation Type | SLANT LUG W/ONE HOLE SINGLE END |
| Largest Width | 0.188 INCHES SINGLE END IN |
| Surface Treatment | TIN OVERALL SINGLE LAYER |
| Mounting Tongue Width | 0.312 INCHES IN |
| Material | COPPER ALLOY OVERALL |
| Material Thickness | 0.016 INCHES IN |
| 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 |
|---|---|
| 4021-12 PRIMARY | Brainin-Advance Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| 304-1461-010 | 7/2 Vendor item drawing reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 5940-01-043-9959 is a Terminal,lug, manufactured by Brainin-Advance Industries, Llc, classified under FSC 5940, Lugs, Terminals, and Terminal Strips. Status: active.
NSN 5940-01-043-9959 has 1 manufacturer part number on file: 4021-12 (Brainin-Advance Industries, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 1010-01-654-7329, 5930-01-672-9634. Verify interchangeability with system specifications before substitution.
Key specifications for 4021-12: Overall Length: 0.750 INCHES IN; Surface Treatment Document and Classification: MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL SINGLE LAYER; Mounting Facility Thickness: 0.016 INCHES IN; Mounting Hole Diameter: 0.221 INCHES IN. 14 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.