The Guard,fan Impeller, cataloged under National Stock Number 4140-01-038-6749, 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 Penn Metal Fabricators Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4140-01-038-6749 |
| Primary Part Number | 503251 |
| Item Name | Guard,fan Impeller |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Penn Metal Fabricators Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 503251 PRIMARY | Penn Metal Fabricators Inc (USA) |
| Reference | Meaning |
|---|---|
| 503251 | 5/9 Secondary reference Keene Corp Metal Products Div Penn Metal Opn |
NSN 4140-01-038-6749 is a Guard,fan Impeller, manufactured by Penn Metal Fabricators Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-038-6749 has 1 manufacturer part number on file: 503251 (Penn Metal Fabricators Inc).
Key specifications for 503251: Special Features: WIRE GRILL TYPE,DRUM SHAPE,9.531 IN.O/A DIA,3.547 IN.APPROX DEEP,BRIGHT BASIC STEEL WIRE,FRAMING WIRES 0.135 IN.DIA,FACE WIRES 0.0915 IN.DIA,SPACED 1.06 IN.CONCENTRIC TO 1.5 IN.DIA CENTER DISC,SPACED 0.531 IN.FOR FULL DEPTH OF GUARD,REAR FACE FRAMED W/2 METAL STRIPS TO PROVIDE 4 MTG HOLES IN 1.5 BY 3.68 IN.RECTANGULAR PATTERN CENTERED ON REAR FACE CENTER; IN. 0 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.