The Washer,flat, cataloged under National Stock Number 5310-00-892-4730, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Kaydon Custom Filtration Corporation. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-892-4730 |
| Primary Part Number | 25M73 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Kaydon Custom Filtration Corporation |
| Status | ACTIVE |
| Overall Diameter | 0.938 INCHES NOMINAL IN |
| Hardness Rating | 80.0 DUROMETER NOMINAL |
| Material Document and Classification | MIL-S-6855,CL 1,GR 80 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | RUBBER SYNTHETIC OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.531 INCHES NOMINAL IN |
| Thickness | 0.063 INCHES NOMINAL IN |
| 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 |
|---|---|
| 200-157 | M. E. Industries, Inc. (USA) |
| 25M73 PRIMARY | Kaydon Custom Filtration Corporation (USA) |
| Reference | Meaning |
|---|---|
| 203-15-9-2 | 5/9 Secondary reference Kaydon Custom Filtration Corporation |
| 2SM73 | 5/9 Secondary reference Kaydon Custom Filtration Corporation |
| C1019 PIECE 97 | 5/9 Secondary reference M. E. Industries, Inc. |
NSN 5310-00-892-4730 is a Washer,flat, manufactured by Kaydon Custom Filtration Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-892-4730 has 2 manufacturer part numbers on file: 200-157 (M. E. Industries, Inc.), 25M73 (Kaydon Custom Filtration Corporation).
3 possible matches (shared part number, not a government interchangeability claim): 5950-00-912-8460, 4310-01-110-5187, 2360-01-702-4947. Verify interchangeability with system specifications before substitution.
Key specifications for 25M73: Overall Diameter: 0.938 INCHES NOMINAL IN; Hardness Rating: 80.0 DUROMETER NOMINAL; Material Document and Classification: MIL-S-6855,CL 1,GR 80 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.