The Ring,externally Threaded, cataloged under National Stock Number 5365-00-752-1779, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 16 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5365-00-752-1779 |
| Primary Part Number | 7521779 |
| Item Name | Ring,externally Threaded |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Bore Annular Internal Serration | NOT INCLUDED |
| Material Hardness Rating | 57.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM |
| Beveled Thread | NOT INCLUDED |
| Drive Type | SLOTTED FACE |
| Bore Shape | STRAIGHT |
| Thread Direction | RIGHT-HAND |
| Setscrew Locking Notch | NOT INCLUDED |
| Accommodation Type and Quantity | 17 SLOTS |
| Casehardening Indicator | NOT CASEHARDENED |
| Angle Between Accommodations in Deg | 90.0 |
| Thread Size | 4.422-12 |
| Screw Thread Series Designator | UNS |
| Depth | 0.375 INCHES NOMINAL IN |
| Width | 0.406 INCHES NOMINAL IN |
| Bore Diameter | 3.000 INCHES NOMINAL IN |
| Material | IRON CAST |
| 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 |
|---|---|
| 7521779 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 2214E57 | Meritor Industrial Products, Llc (USA) |
| Reference | Meaning |
|---|---|
| 2214E57 | 5/9 Secondary reference Meritor Heavy Vehicle Systems, Llc |
| 801E557 | 5/9 Secondary reference Kersey / American Lafrance a Div of Figgie International Inc |
| 5365007521779 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 2648D5 | 5/9 Secondary reference Diamond Reo Truck Co |
NSN 5365-00-752-1779 is a Ring,externally Threaded, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-00-752-1779 has 2 manufacturer part numbers on file: 7521779 (U S Army Tank Automotive Command Amsta-Im-Mm), 2214E57 (Meritor Industrial Products, Llc).
Key specifications for 7521779: Bore Annular Internal Serration: NOT INCLUDED; Material Hardness Rating: 57.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM; Beveled Thread: NOT INCLUDED; Drive Type: SLOTTED FACE. 16 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.