The Filter Element,fluid, cataloged under National Stock Number 2940-01-497-8635, is classified within Federal Supply Class 2940 (Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Walker Design, Inc. Dba Walker Design Inc Div Walker Engineering Enterprises, Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2940-01-497-8635 |
| Primary Part Number | LB6 REF D |
| Item Name | Filter Element,fluid |
| FSC / FSG | 2940 / 29 — Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft |
| Manufacturer | Walker Design, Inc. Dba Walker Design Inc Div Walker Engineering Enterprises, Inc |
| Status | ACTIVE |
| Flow Direction | INSIDE OUT |
| Design Type | REUSABLE |
| Style Designator | CYLINDRICAL W/OUT CONTAINER |
| Media for Which Designed | AIR |
| Material | RUBBER SYNTHETIC BODY |
| 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 |
|---|---|
| LB6 REF D PRIMARY | Walker Design, Inc. Dba Walker Design Inc Div Walker Engineering Enterprises, Inc (USA) |
| Reference | Meaning |
|---|---|
| JS-4110-004 | C/1 Advisory reference — outside the item-of-supply concept Walker Design, Inc. Dba Walker Design Inc Div Walker Engineering Enterprises, Inc |
| LB6 | D/9 Drawing number reference only Walker Design, Inc. Dba Walker Design Inc Div Walker Engineering Enterprises, Inc |
NSN 2940-01-497-8635 is a Filter Element,fluid, manufactured by Walker Design, Inc. Dba Walker Design Inc Div Walker Engineering Enterprises, Inc, classified under FSC 2940, Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft. Status: active.
NSN 2940-01-497-8635 has 1 manufacturer part number on file: LB6 REF D (Walker Design, Inc. Dba Walker Design Inc Div Walker Engineering Enterprises, Inc).
Key specifications for LB6 REF D: Flow Direction: INSIDE OUT; Design Type: REUSABLE; Style Designator: CYLINDRICAL W/OUT CONTAINER; Special Features: FILTER,VENT 3.000IN. LENGTH, 3.319IN. HEIGHT; FILTER MEDIA IS MULTIPLE PLY'S OF A COTTON GAUZE MATERIAL SANDWICHED BETWEEN PLEATED EPOXY COATED SCREEN MATERIAL IN. 5 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.