The Ring,retaining, cataloged under National Stock Number 5325-00-281-6624, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Heil Environmental Industries. Government technical data includes 11 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-00-281-6624 |
| Primary Part Number | RM26A987 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Heil Environmental Industries |
| Status | ACTIVE |
| Material Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL |
| End Style | 90 DEGREE PARALLEL |
| Strength Rating | ERR-060 |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 1.031 INCHES NOMINAL IN |
| Major Thickness | 0.109 INCHES NOMINAL IN |
| Inside Diameter | 0.813 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| 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 |
|---|---|
| RM26A987 PRIMARY | Heil Environmental Industries (USA) |
| 290813R1 | Komatsu America Corp. (USA) |
| Reference | Meaning |
|---|---|
| 290813R1 | 5/9 Secondary reference Komatsu American Intl Co |
| 290813R1 | 5/9 Secondary reference U.S. Government activity |
| 290813R1 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| XSC135 | 5/9 Secondary reference Mellowes Co Div of Charter Mfg Co Inc |
NSN 5325-00-281-6624 is a Ring,retaining, manufactured by Heil Environmental Industries, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-281-6624 has 2 manufacturer part numbers on file: RM26A987 (Heil Environmental Industries), 290813R1 (Komatsu America Corp.).
Key specifications for RM26A987: Material Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL; End Style: 90 DEGREE PARALLEL; Strength Rating: ERR-060. 11 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.