The Ring,retaining, cataloged under National Stock Number 5325-00-972-6825, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Circor Pumps North America Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-972-6825 |
| Primary Part Number | PP028CA-287 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Circor Pumps North America Llc |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Strength Rating | ERR-060 |
| Material Document and Classification | MIL-S-46049, COMP 1074 OR 1075 OR 1085 MIL SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUNDED CORNERS |
| Outside Diameter | 3.053 INCHES MINIMUM AND 3.078 INCHES MAXIMUM IN |
| Major Thickness | 0.047 INCHES NOMINAL IN |
| Inside Diameter | 2.677 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPECIAL FLAT |
| Material | STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1085 |
| 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 |
|---|---|
| PP028CA-287 PRIMARY | Circor Pumps North America Llc (USA) |
| 3P6599 | Caterpillar Inc Div Caterpillar Defense (USA) |
| WHT-287 | Smalley Steel Ring Co. (USA) |
| Reference | Meaning |
|---|---|
| RRT287 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-00-972-6825 is a Ring,retaining, manufactured by Circor Pumps North America Llc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-972-6825 has 3 manufacturer part numbers on file: PP028CA-287 (Circor Pumps North America Llc), 3P6599 (Caterpillar Inc Div Caterpillar Defense), WHT-287 (Smalley Steel Ring Co.).
Key specifications for PP028CA-287: Usage Design: INTERNAL; Strength Rating: ERR-060; Material Document and Classification: MIL-S-46049, COMP 1074 OR 1075 OR 1085 MIL SPEC SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: ROUNDED CORNERS. 10 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.