The Contact Strip,radio Frequency Gr, cataloged under National Stock Number 5940-01-391-8645, 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 The Boeing Company Div Defense. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5940-01-391-8645 |
| Primary Part Number | ST4M220-4B |
| Item Name | Contact Strip,radio Frequency Gr |
| FSC / FSG | 5940 / 59 — Lugs, Terminals, and Terminal Strips |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-T-10727, TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE |
| Mounting Method | HOLE |
| Contact Finger Quantity | 2 |
| Overall Thickness | 0.012 INCHES NOMINAL IN |
| Unit Type | ANGLE |
| Surface Treatment | TIN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| ST4M220-4B PRIMARY | The Boeing Company Div Defense (USA) |
| 869-74 | Laird Technologies, Inc Dba Laird Technologies (USA) |
| ST4M220-4B | Tech-Etch, Inc. Dba Tech-Etch Inc (USA) |
NSN 5940-01-391-8645 is a Contact Strip,radio Frequency Gr, manufactured by The Boeing Company Div Defense, classified under FSC 5940, Lugs, Terminals, and Terminal Strips. Status: active.
NSN 5940-01-391-8645 has 3 manufacturer part numbers on file: ST4M220-4B (The Boeing Company Div Defense), 869-74 (Laird Technologies, Inc Dba Laird Technologies), ST4M220-4B (Tech-Etch, Inc. Dba Tech-Etch Inc).
Key specifications for ST4M220-4B: Surface Treatment Document and Classification: MIL-T-10727, TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE; Mounting Method: HOLE; Contact Finger Quantity: 2; Overall Thickness: 0.012 INCHES NOMINAL IN. 7 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.