The Holder,electrostatic Discharger, cataloged under National Stock Number 5920-01-331-3199, is classified within Federal Supply Class 5920 (Fuses, Arrestors, Absorbers, and Protectors) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Aero-Mach Tco Manufacturing Inc. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5920-01-331-3199 |
| Primary Part Number | B-4 |
| Item Name | Holder,electrostatic Discharger |
| FSC / FSG | 5920 / 59 — Fuses, Arrestors, Absorbers, and Protectors |
| Manufacturer | Aero-Mach Tco Manufacturing Inc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 2 UNTHREADED HOLE(S) ALL MOUNTING FACILITIES |
| Surface Treatment Document and Classification | MIL-C-5541,TYPE 1,GRADE B,CLASS 1.2 MIL SPEC SINGLE TREATMENT RESPONSE |
| Unthreaded Mounting Hole Diameter | 0.138 INCHES NOMINAL ALL MOUNTING FACILITIES IN |
| Style Designator | RECTANGULAR PRISM |
| Distance Between Mounting Facility Centers | 0.125 INCHES NOMINAL ALL MOUNTING FACILITIES ALL CENTER GROUPINGS IN |
| Surface Treatment | CHROMATE |
| Material | ALUMINUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B-4 PRIMARY | Aero-Mach Tco Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| HS5689-3 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
| HS5689-3 | 7/2 Vendor item drawing reference The Boeing Company |
NSN 5920-01-331-3199 is a Holder,electrostatic Discharger, manufactured by Aero-Mach Tco Manufacturing Inc, classified under FSC 5920, Fuses, Arrestors, Absorbers, and Protectors. Status: active.
NSN 5920-01-331-3199 has 1 manufacturer part number on file: B-4 (Aero-Mach Tco Manufacturing Inc).
Key specifications for B-4: Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S) ALL MOUNTING FACILITIES; Overall Height: 0.312 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-5541,TYPE 1,GRADE B,CLASS 1.2 MIL SPEC SINGLE TREATMENT RESPONSE; Unthreaded Mounting Hole Diameter: 0.138 INCHES NOMINAL ALL MOUNTING FACILITIES IN. 7 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.