The Fan,ventilating, cataloged under National Stock Number 4140-01-660-1991, 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 Hoffman Enclosures Inc Dba Hoffman Enclosures Inc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-660-1991 |
| Primary Part Number | 1RB80M |
| Item Name | Fan,ventilating |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Hoffman Enclosures Inc Dba Hoffman Enclosures Inc |
| Status | ACTIVE |
| Inclosure Type | PARTIALLY INCLOSED |
| Length | 4.82 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 115.0 AC |
| Flow Direction | REVERSIBLE |
| Style Designator | FIXED |
| Height | 8.88 INCHES NOMINAL IN |
| Operating Speed at Rated Capacity in RPM | 3000.0 |
| Width | 10.13 INCHES NOMINAL IN |
| Prime Mover Type | ELECTRIC MOTOR |
| Air Flow Rate | 275.0 CUBIC FEET PER MINUTE MINIMUM AND 493.0 CUBIC FEET PER MINUTE MAXIMUM |
| 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 |
|---|---|
| 1RB80M PRIMARY | Hoffman Enclosures Inc Dba Hoffman Enclosures Inc (USA) |
| Reference | Meaning |
|---|---|
| 1RB65 | 5/9 Secondary reference Hoffman Enclosures Inc Dba Hoffman Enclosures Inc |
NSN 4140-01-660-1991 is a Fan,ventilating, manufactured by Hoffman Enclosures Inc Dba Hoffman Enclosures Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-660-1991 has 1 manufacturer part number on file: 1RB80M (Hoffman Enclosures Inc Dba Hoffman Enclosures Inc).
Key specifications for 1RB80M: Inclosure Type: PARTIALLY INCLOSED; Length: 4.82 INCHES NOMINAL IN; Voltage in Volts and Current Type: 115.0 AC; Flow Direction: REVERSIBLE. 10 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.