The Ring,back, cataloged under National Stock Number 4940-01-016-5923, is classified within Federal Supply Class 4940 (Miscellaneous Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Ingersoll-Rand Company- Parts. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Ring,back |
| FSC / FSG | 4940 — Miscellaneous Maintenance and Repair Shop Specialized Equipment (FSG 49) |
| Manufacturers | Ingersoll-Rand Company- Parts (CAGE 6K358) |
| Parameter | Value |
|---|---|
| NSN | 4940-01-016-5923 |
| Primary Part Number | 21681-3 |
| Item Name | Ring,back |
| FSC / FSG | 4940 / 49 — Miscellaneous Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Ingersoll-Rand Company- Parts |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 21681-3 PRIMARY | Ingersoll-Rand Company- Parts (USA) |
| Reference | Meaning |
|---|---|
| 21681-3 | 5/9 Secondary reference Ingersoll Rand Co |
| 21681-3 | C/1 Advisory reference — outside the item-of-supply concept Ingersoll-Rand Company Dba Ingersoll-Rand |
| 21681-3 | 5/9 Secondary reference U.S. Government activity |
NSN 4940-01-016-5923 is a Ring,back, manufactured by Ingersoll-Rand Company- Parts, classified under FSC 4940, Miscellaneous Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4940-01-016-5923 has 1 manufacturer part number on file: 21681-3 (Ingersoll-Rand Company- Parts).
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.