The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-443-5641, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-443-5641 |
| Primary Part Number | 166M1240A1 PC 7L1 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Criticality Code Justification | ZZZY |
| Nominal Thread Size | 1.000 INCHES IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 8 |
| Material | NICKEL ALLOY OVERALL |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IN ACCORDANCE WITH NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 166M1240A1 PC 7L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 166M1240A1 PC 7 | 3/1 Design control — primary reference Fluid Handling Llc |
| 166M1240A1 PC 7 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
NSN 5310-01-443-5641 is a Nut,plain,hexagon, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-443-5641 has 1 manufacturer part number on file: 166M1240A1 PC 7L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 166M1240A1 PC 7L1: Thread Series: UNIFIED NATIONAL COARSE (UNC); Criticality Code Justification: ZZZY; Nominal Thread Size: 1.000 INCHES IN; Thread Class: 2B. 7 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.