The Block,harness Clip, cataloged under National Stock Number 1680-00-321-8558, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Martin-Baker Aircraft Company Limited. Government technical data includes 1 specification, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-00-321-8558 |
| Primary Part Number | MB400-66 |
| Item Name | Block,harness Clip |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| General Characteristics Item Description | BLACK ANODIC FINISH,1.350 IN. LG,0.500 IN. W,0.290 IN.O/A THK,2 HOLES 0.156 IN. DIA,0.850 IN. DISTANCE BETWEEN HOLECENTERS ALONG LG,0.250 IN. DISTANCE FROM EDGE TO HOLE CENTERSALONG LG AND W IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MB400-66 PRIMARY | Martin-Baker Aircraft Company Limited (GBR) |
NSN 1680-00-321-8558 is a Block,harness Clip, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-00-321-8558 has 1 manufacturer part number on file: MB400-66 (Martin-Baker Aircraft Company Limited).
Key specifications for MB400-66: General Characteristics Item Description: BLACK ANODIC FINISH,1.350 IN. LG,0.500 IN. W,0.290 IN.O/A THK,2 HOLES 0.156 IN. DIA,0.850 IN. DISTANCE BETWEEN HOLECENTERS ALONG LG,0.250 IN. DISTANCE FROM EDGE TO HOLE CENTERSALONG LG AND W IN. 1 specification is 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.
NSN 1680-00-321-8558 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.