The Blower,air Barrier, cataloged under National Stock Number 4140-01-052-1377, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is King Co Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-052-1377 |
| Primary Part Number | SI1-3-100 |
| Item Name | Blower,air Barrier |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | King Co Inc |
| Status | ACTIVE |
| Phase | THREE |
| Nondefinitive Spec/std Data | 1 TYPE |
| Frequency Rating | 60.0 HERTZ NOMINAL |
| 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 |
|---|---|
| SI1-3-100 PRIMARY | King Co Inc (USA) |
| Reference | Meaning |
|---|---|
| OO-B-1620 | 5/9 Secondary reference U.S. Government activity |
| 3-75 | 5/9 Secondary reference King Co Inc |
NSN 4140-01-052-1377 is a Blower,air Barrier, manufactured by King Co Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-052-1377 has 1 manufacturer part number on file: SI1-3-100 (King Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 4140-01-052-1378. Verify interchangeability with system specifications before substitution.
Key specifications for SI1-3-100: Phase: THREE; Nondefinitive Spec/std Data: 1 TYPE; Special Features: INSERT BARRIER TYPE;DESIGNED FOR NOM 3 FT W X 7 FT H DOOR OPENING;1600 FPM AIR VELOCITY MEASIRED 3 FT ABOVE FLOOR;ELECTRIC MOTOR DRIVE;220/440 V;W/ANGLE ADJUSTMENT FOR 15 DEG FROM VERTICAL;DEPARTURE FROM CITED DOCUMENT:AS MODIFIED BY ELEC CHARACTERISTICS AND WD OF DOOR OPENING V; Frequency Rating: 60.0 HERTZ NOMINAL. 3 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.