The Nut,plain,round, cataloged under National Stock Number 5310-00-326-4331, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is United Machine and Tool Co Inc an Independently Owned and Operated Business. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-326-4331 |
| Primary Part Number | 164B6556P1 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | United Machine and Tool Co Inc an Independently Owned and Operated Business |
| Status | ACTIVE |
| Thread Series | UNF |
| Material Document and Classification | GE B21 Y42 FSCM 89954 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.073 INCHES IN |
| Nut Diameter | 0.165 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| Drive Point Depth | 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| Nut Thickness | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Drive Point Quantity | 2 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 72 |
| Material | NICKEL ALLOY 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 |
|---|---|
| 164B6556P1 | United Machine and Tool Co Inc an Independently Owned and Operated Business (USA) |
| 164B6556P1 | Preci-Manufacturing, Incorporated (USA) |
| 164B6556P1 | Bob Cat Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 164B6556P1 | 3/2 Design control — primary reference U.S. Government activity |
| 164B6556P1 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-326-4331 is a Nut,plain,round, manufactured by United Machine and Tool Co Inc an Independently Owned and Operated Business, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-326-4331 has 3 manufacturer part numbers on file: 164B6556P1 (United Machine and Tool Co Inc an Independently Owned and Operated Business), 164B6556P1 (Preci-Manufacturing, Incorporated), 164B6556P1 (Bob Cat Manufacturing).
Key specifications for 164B6556P1: Thread Series: UNF; Material Document and Classification: GE B21 Y42 FSCM 89954 MFR REF SINGLE MATERIAL RESPONSE OVERALL; Drive Point Width: 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN; 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.