The Reel,shoulder Harness,inertia Lo, cataloged under National Stock Number 1680-00-629-8690, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Ami Industries, Inc Div Utc Aerospace Systems. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-00-629-8690 |
| Primary Part Number | 4A1-1-2128-3 |
| Item Name | Reel,shoulder Harness,inertia Lo |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Ami Industries, Inc Div Utc Aerospace Systems |
| Status | ACTIVE |
| Electrically Operated Control | NOT INCLUDED |
| Manual Lock Control Type | CABLE CONNECTION |
| Mounting Hole Quantity | 7 |
| Reel Type | UNIDIRECTIONAL |
| Cable Diameter | 0.188 INCHES NOMINAL IN |
| Center to Center Distance From Reel to Control Handle Shaft | 28.250 INCHES NOMINAL IN |
| Mounting Hole Diameter | 0.193 INCHES NOMINAL IN |
| Shoulder Harness Attachment | INCLUDED |
| Nondefinitive Spec/std Data | MA1 TYPE |
| Shoulder Harness Attachment Type for Which Designed | CABLE |
| Reel Location | LEFT HAND |
| Cable Travel Length on Drum | 18.000 INCHES NOMINAL IN |
| Electrical Connector | NOT INCLUDED |
| Shoulder Harness Attachment Extended Length | 22.500 INCHES NOMINAL 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 |
|---|---|
| 4A1-1-2128-3 PRIMARY | Ami Industries, Inc Div Utc Aerospace Systems (USA) |
| Reference | Meaning |
|---|---|
| 0-4600-840 | 5/9 Secondary reference American Seating Company Dba Secura |
| MILR8236BASGTYPEMA1 | 4/1 Identification reference U.S. Government activity |
NSN 1680-00-629-8690 is a Reel,shoulder Harness,inertia Lo, manufactured by Ami Industries, Inc Div Utc Aerospace Systems, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-00-629-8690 has 1 manufacturer part number on file: 4A1-1-2128-3 (Ami Industries, Inc Div Utc Aerospace Systems).
1 possible match (shared part number, not a government interchangeability claim): 1680-00-788-9017. Verify interchangeability with system specifications before substitution.
Key specifications for 4A1-1-2128-3: Electrically Operated Control: NOT INCLUDED; Manual Lock Control Type: CABLE CONNECTION; Mounting Hole Quantity: 7; Overall Height: 4.250 INCHES NOMINAL IN. 14 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.
NSN 1680-00-629-8690 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.