The Ring,retaining, cataloged under National Stock Number 5325-01-496-6987, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-01-496-6987 |
| Primary Part Number | 9M188-68 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| Strength Rating | ERR-060 |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 0.730 INCHES NOMINAL IN |
| Major Thickness | 0.035 INCHES NOMINAL IN |
| Inside Diameter | 0.620 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPIRAL |
| 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 |
|---|---|
| 9M188-68 | Sealtite Corp Div Sealtite Corporation (USA) |
| 9M188-68 | Smalley Steel Ring Co. (USA) |
| 9M188-68 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 9M188-68 | 5/2 Secondary reference U.S. Government activity |
| 9M188 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 5325-01-496-6987 is a Ring,retaining, manufactured by The Boeing Company Div Defense, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-496-6987 has 3 manufacturer part numbers on file: 9M188-68 (Sealtite Corp Div Sealtite Corporation), 9M188-68 (Smalley Steel Ring Co.), 9M188-68 (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-725-3946. Verify interchangeability with system specifications before substitution.
Key specifications for 9M188-68: Usage Design: EXTERNAL; Strength Rating: ERR-060; Cross-Sectional Shape Style: DOUBLE OVAL; Outside Diameter: 0.730 INCHES NOMINAL IN. 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.