The Ring,lock,serrated, cataloged under National Stock Number 5365-00-650-4801, is classified within Federal Supply Class 5365 (Bushings, Rings, Shims, and Spacers) of the Hardware and Abrasives group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5365-00-650-4801 |
| Primary Part Number | RLR18SB6 |
| Item Name | Ring,lock,serrated |
| FSC / FSG | 5365 / 53 — Bushings, Rings, Shims, and Spacers |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Overall Outside Diameter | 0.308 INCHES NOMINAL IN |
| Inner Serration Quantity | 16 |
| Pilot Diameter | 0.255 INCHES NOMINAL IN |
| Inside Diameter | 0.189 INCHES NOMINAL IN |
| Side Outer Serrations Omitted for Close Edge Installation | ONE SIDE |
| Surface Treatment | CADMIUM AND CHROMATE |
| Outer Serration Quantity | 20 |
| Material | STEEL COMP 1117 |
| 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 |
|---|---|
| 10153942 | Us Army Aviation and Missile Command (USA) |
| RLR18SB6 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| 100T175 | 5/9 Secondary reference Westinghouse Electric Corp |
| 626-502-9014 | C/1 Advisory reference — outside the item-of-supply concept Honeywell International Inc. Div Aerospace - Torrance |
| RLR18SB6 | 5/9 Secondary reference U.S. Government activity |
| 100T175 | 5/9 Secondary reference Colt Industries Operating Corp Pratt and Whitney Machine Tool Div |
NSN 5365-00-650-4801 is a Ring,lock,serrated, manufactured by Us Army Aviation and Missile Command, classified under FSC 5365, Bushings, Rings, Shims, and Spacers. Status: active.
NSN 5365-00-650-4801 has 2 manufacturer part numbers on file: 10153942 (Us Army Aviation and Missile Command), RLR18SB6 (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-107-6785. Verify interchangeability with system specifications before substitution.
Key specifications for RLR18SB6: Overall Height: 0.099 INCHES NOMINAL IN; Overall Outside Diameter: 0.308 INCHES NOMINAL IN; Inner Serration Quantity: 16; Pilot Diameter: 0.255 INCHES NOMINAL IN. 8 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.