The Lock,seat,back, cataloged under National Stock Number 2540-01-420-9990, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 2540-01-420-9990 |
| Item Name | Lock,seat,back |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Status | ACTIVE |
| General Characteristics Item Description | 0.100 IN.MIN BETWEEN LEVER AND HOUSING WHEN LOCK IS IN NORMAL POS;LEFT HAND IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Reference | Meaning |
|---|---|
| MM65-1163 | 3/2 Design control — primary reference U.S. Government activity |
| MM65-1163 | 3/9 Design control — primary reference Porter P L Co |
NSN 2540-01-420-9990 is a Lock,seat,back, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
Key specifications for 2540-01-420-9990: General Characteristics Item Description: 0.100 IN.MIN BETWEEN LEVER AND HOUSING WHEN LOCK IS IN NORMAL POS;LEFT HAND IN; Overall Width: 0.830 INCHES NOMINAL IN; Special Features: FULLY COMPRESSED O/A LENGTH 5.030 IN.;FULLY EXTENDED O/A LENGTH 13.690 IN. IN; End Item Identification: 1430-01-378-6963. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.