The Ring,retaining, cataloged under National Stock Number 5325-01-656-6558, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army. Government technical data includes 9 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 | 5325-01-656-6558 |
| Primary Part Number | 6LD20 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army |
| Status | ACTIVE |
| Material Hardness Rating | 49.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| Minor Thickness | 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN |
| Strength Rating | ERR-060 |
| Outside Diameter | 0.831 INCHES NOMINAL IN |
| Gap Opening | OPENING 90 DEGREES OR MORE |
| Ring Style | INTERNAL |
| Surface Treatment | PHOSPHATE |
| Material | STEEL |
| 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 |
|---|---|
| 6LD20 PRIMARY | Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army (USA) |
NSN 5325-01-656-6558 is a Ring,retaining, manufactured by Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-656-6558 has 1 manufacturer part number on file: 6LD20 (Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army).
Key specifications for 6LD20: Material Hardness Rating: 49.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Minor Thickness: 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN; Strength Rating: ERR-060. 9 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.