The Lining,friction, cataloged under National Stock Number 3040-00-423-8018, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-423-8018 |
| Primary Part Number | A1499 |
| Item Name | Lining,friction |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| Status | ACTIVE |
| Circular Pattern Hole Type and Quantity | 6 COUNTERBORED SINGLE SECURING CIRCLE |
| Strengthening Feature | INTERNALLY MOLDED-IN REINFORCEMENT |
| Hole Arrangement Style | STRAIGHT |
| Supplementary Features | THIS ITEM HAS BEEN REVIEWED FOR ASBESTOS MATERIAL. THE CURRENT APPROVED SOURCES 61208 HAVE INDICATED THEIR PART NUMBER CONTAINED ASBESTOS PRIOR TO 1984. THEY CONTINUE TO MANUFACTURE THE SAME PART NUMBER WITHOUT ASBESTOS MATERIAL AFTER 1984 |
| Lining Style | CLUTCH DISK |
| Features Provided | RIGID FRICTION LINING |
| Surface Condition and Location | BOTH SIDES GROUND |
| Application Type | DRY |
| Attachment Method | RIVETED |
| Minor Diameter | 2.750 INCHES MINIMUM AND 2.781 INCHES MAXIMUM IN |
| Fabrication Method | WOVEN |
| Major Diameter | 4.469 INCHES MINIMUM AND 4.500 INCHES MAXIMUM IN |
| Thickness | 0.125 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3040-00-423-8018 is a Lining,friction, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-423-8018 has 2 manufacturer part numbers on file: A1499 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic), A1499P (Asphalt Equipment Co Inc).
4 possible matches (shared part number, not a government interchangeability claim): 5365-01-495-8411, 8455-01-673-8614, 8455-01-715-0842. Verify interchangeability with system specifications before substitution.
Key specifications for A1499: Circular Pattern Hole Type and Quantity: 6 COUNTERBORED SINGLE SECURING CIRCLE; Strengthening Feature: INTERNALLY MOLDED-IN REINFORCEMENT; Hole Arrangement Style: STRAIGHT; Supplementary Features: THIS ITEM HAS BEEN REVIEWED FOR ASBESTOS MATERIAL. THE CURRENT APPROVED SOURCES 61208 HAVE INDICATED THEIR PART NUMBER CONTAINED ASBESTOS PRIOR TO 1984. THEY CONTINUE TO MANUFACTURE THE SAME PART NUMBER WITHOUT ASBESTOS MATERIAL AFTER 1984. 13 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.