The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-021-8200, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Kenworth Truck Co a Div of Paccar Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-021-8200 |
| Primary Part Number | 6X3-7-8 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Kenworth Truck Co a Div of Paccar Inc |
| Status | ACTIVE |
| Width Across Flats | 1.313 INCHES NOMINAL IN |
| Thread Series | UNF |
| Material Document and Classification | QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.875 INCHES IN |
| Departure From Cited Document | AS MODIFIED BY NUT HEIGHT |
| Nondefinitive Spec/std Data | A TYPE |
| Nut Height | 0.750 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 14 |
| Material | STEEL OVERALL |
| Bearing Surface Type | WASHER FACED |
| 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 |
|---|---|
| 6X3-7-8 PRIMARY | Kenworth Truck Co a Div of Paccar Inc (USA) |
| Reference | Meaning |
|---|---|
| 218200 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| FFB571TYPEA | 4/1 Identification reference U.S. Government activity |
| 6X3-7-8 | 5/9 Secondary reference Kaitlin Corp |
| 7T476-1 | 5/9 Secondary reference Athey Products Corp |
| 218200 | 5/9 Secondary reference General Motors Corp |
NSN 5310-00-021-8200 is a Nut,plain,hexagon, manufactured by Kenworth Truck Co a Div of Paccar Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-021-8200 has 1 manufacturer part number on file: 6X3-7-8 (Kenworth Truck Co a Div of Paccar Inc).
3 possible matches (shared part number, not a government interchangeability claim): 2915-00-960-4421, 5920-01-251-7998, 5310-01-484-9112. Verify interchangeability with system specifications before substitution.
Key specifications for 6X3-7-8: Width Across Flats: 1.313 INCHES NOMINAL IN; Thread Series: UNF; Material Document and Classification: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 13 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.