The Ring,retaining, cataloged under National Stock Number 5325-01-706-0654, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Charles Reed Knight Jr Dba Knight's Armament Company. Government technical data includes 3 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-706-0654 |
| Primary Part Number | 21410 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Charles Reed Knight Jr Dba Knight's Armament Company |
| Status | ACTIVE |
| Cross-Sectional Shape Style | SPLIT ROUND |
| Outside Diameter | 5.56 INCHES NOMINAL IN |
| Gap Opening | OPENING LESS THAN 90 DEGREES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21410 PRIMARY | Charles Reed Knight Jr Dba Knight's Armament Company (USA) |
NSN 5325-01-706-0654 is a Ring,retaining, manufactured by Charles Reed Knight Jr Dba Knight's Armament Company, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-706-0654 has 1 manufacturer part number on file: 21410 (Charles Reed Knight Jr Dba Knight's Armament Company).
Key specifications for 21410: Cross-Sectional Shape Style: SPLIT ROUND; Outside Diameter: 5.56 INCHES NOMINAL IN; Gap Opening: OPENING LESS THAN 90 DEGREES; Special Features: NHA-BOLT ASSEMBLY, DUAL EJECTOR SR-15. 3 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 5325-01-706-0654 has DEMIL Code Q. 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.