The Nut,plain,round, cataloged under National Stock Number 5310-00-550-9688, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Federal Industries, Inc. Dba Federal Industries Inc. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-550-9688 |
| Primary Part Number | 350786 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Federal Industries, Inc. Dba Federal Industries Inc |
| Status | ACTIVE |
| Width Across Flats | 0.344 INCHES NOMINAL IN |
| Thread Series | UNF |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL-S-6050,COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.625 INCHES NOMINAL IN |
| Nut Thickness | 1.000 INCHES NOMINAL IN |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8630 OVERALL |
| 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 |
|---|---|
| 350786 | Federal Industries, Inc. Dba Federal Industries Inc (USA) |
| 350786 | Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 350786 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-550-9688 is a Nut,plain,round, manufactured by Federal Industries, Inc. Dba Federal Industries Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-550-9688 has 2 manufacturer part numbers on file: 350786 (Federal Industries, Inc. Dba Federal Industries Inc), 350786 (Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing).
3 possible matches (shared part number, not a government interchangeability claim): 5945-01-148-4020, 4730-01-178-4836, 5340-01-677-2964. Verify interchangeability with system specifications before substitution.
Key specifications for 350786: Width Across Flats: 0.344 INCHES NOMINAL IN; Thread Series: UNF; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Material Document and Classification: MIL-S-6050,COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 12 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.