The Washer,flat, cataloged under National Stock Number 5310-00-285-4272, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Carrier Corp. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 34 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-285-4272 |
| Primary Part Number | MR3950-1PC28 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Carrier Corp |
| Status | ACTIVE |
| Overall Diameter | 2.125 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.500 INCHES NOMINAL IN |
| Thickness | 0.312 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 |
|---|---|
| MR3950-1PC28 PRIMARY | Carrier Corp (USA) |
| MRA5300-207PC37 PRIMARY | Carrier Corp (USA) |
| ME7950-1PC37 PRIMARY | Carrier Corp (USA) |
| MR7135-1PC37 PRIMARY | Carrier Corp (USA) |
| MR3820-1PC28 PRIMARY | Carrier Corp (USA) |
| MR7135-7PC37 PRIMARY | Carrier Corp (USA) |
| 7G5-2152 PRIMARY | Carrier Corp (USA) |
| MRA5300-201PC37 PRIMARY | Carrier Corp (USA) |
| ME7930-7PC37 PRIMARY | Carrier Corp (USA) |
| MR5857-101PC28 PRIMARY | Carrier Corp (USA) |
| MRA5300-38PC28 PRIMARY | Carrier Corp (USA) |
| MR7134-1PC37 PRIMARY | Carrier Corp (USA) |
| MRA5300-101PC28 PRIMARY | Carrier Corp (USA) |
| ME7930-1PC37 PRIMARY | Carrier Corp (USA) |
| MR5857-128PC28 PRIMARY | Carrier Corp (USA) |
| MR3950-6PC28 PRIMARY | Carrier Corp (USA) |
| Reference | Meaning |
|---|---|
| 0ME145-1PC37 | 5/9 Secondary reference Carrier Corp |
| 2MA313-1PC29 | 5/9 Secondary reference Carrier Corp |
| 2ME330-4PC29 | 5/9 Secondary reference Carrier Corp |
| 2ME365-4PC29 | 5/9 Secondary reference Carrier Corp |
| 0MEA142-1PC34 | 5/9 Secondary reference Carrier Corp |
| 3ME465-4PC29 | 5/9 Secondary reference Carrier Corp |
| 9ME4-1PC37 | 5/9 Secondary reference Carrier Corp |
| 0MEA174A701PC29 | 5/9 Secondary reference Carrier Corp |
| 0MEA174A704PC29 | 5/9 Secondary reference Carrier Corp |
| 0MEA174-201PC37 | 5/9 Secondary reference Carrier Corp |
| 2ME354-22PC5 | 5/9 Secondary reference Carrier Corp |
| 3ME480-201PC29 | 5/9 Secondary reference Carrier Corp |
| 7G5-2152 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2MA313-301PC34 | 5/9 Secondary reference Carrier Corp |
| 0ME112-1PC37 | 5/9 Secondary reference Carrier Corp |
| 3ME542-1PC29 | 5/9 Secondary reference Carrier Corp |
| 1ME199-1PC37 | 5/9 Secondary reference Carrier Corp |
| 3ME465-1PC29 | 5/9 Secondary reference Carrier Corp |
| 0ME127-1PC37 | 5/9 Secondary reference Carrier Corp |
| 2ME339-4PC29 | 5/9 Secondary reference Carrier Corp |
NSN 5310-00-285-4272 is a Washer,flat, manufactured by Carrier Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-285-4272 has 16 manufacturer part numbers on file: MR3950-1PC28 (Carrier Corp), MRA5300-207PC37 (Carrier Corp), ME7950-1PC37 (Carrier Corp), MR7135-1PC37 (Carrier Corp), MR3820-1PC28 (Carrier Corp) and 11 more.
Key specifications for MR3950-1PC28: Overall Diameter: 2.125 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Center Hole Shape Style: ROUND. 6 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.