The Ring,externally Threaded, cataloged under National Stock Number 5365-01-378-8740, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 20 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-01-378-8740 |
| Primary Part Number | 211055670 |
| Item Name | Ring,externally Threaded |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Bore Annular Internal Serration | NOT INCLUDED |
| Beveled Thread | NOT INCLUDED |
| Chamfer Length | 0.040 INCHES NOMINAL IN |
| Bore Edge Process | CHAMFERED |
| Drive Type | SLOTTED FACE |
| Process End Location | BOTH ENDS |
| Bore Shape | STRAIGHT |
| Thread Direction | RIGHT-HAND |
| Setscrew Locking Notch | NOT INCLUDED |
| Accommodation Type and Quantity | 4 SLOTS |
| Casehardening Indicator | NOT CASEHARDENED |
| Angle Between Accommodations in Deg | 180.0 |
| Thread Size | 1.625-16 |
| Screw Thread Series Designator | UN |
| Chamfer Angle in Deg | 45.0 |
| Depth | 0.250 INCHES NOMINAL IN |
| Width | 0.250 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Bore Diameter | 1.625 INCHES NOMINAL IN |
| Material | COPPER ALLOY 534 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 801-6408784-70 | Naval Sea Systems Command (USA) |
| 211055670 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5365-01-378-8740 is a Ring,externally Threaded, manufactured by Naval Sea Systems Command, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-01-378-8740 has 2 manufacturer part numbers on file: 801-6408784-70 (Naval Sea Systems Command), 211055670 (Naval Sea Systems Command).
Key specifications for 211055670: Bore Annular Internal Serration: NOT INCLUDED; Beveled Thread: NOT INCLUDED; Chamfer Length: 0.040 INCHES NOMINAL IN; Bore Edge Process: CHAMFERED. 20 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.