The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-377-7320, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Trac Regulator Co., Inc. Dba Trac Regulator Co Inc. Government technical data includes 14 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-377-7320 |
| Primary Part Number | 40506-9 ITEM 25 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| Status | ACTIVE |
| Width Across Flats | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Temp Rating | 1000.0 FAHRENHEIT NOMINAL DEGF |
| Hardness Rating | 65.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM |
| Material Document and Classification | ASTM F 594 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Nondefinitive Spec/std Data | 1 TYPE |
| Nut Height | 0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 304 OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| 164-19 | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| 40506-9 ITEM 25 PRIMARY | Trac Regulator Co., Inc. Dba Trac Regulator Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 40398-4 FIND NO 25 | C/1 Advisory reference — outside the item-of-supply concept Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| 40444-4 FIND NO 25 | C/1 Advisory reference — outside the item-of-supply concept Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| 40490-9 FIND NO 25 | C/1 Advisory reference — outside the item-of-supply concept Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
| 40506-4 FIND NO 25 | C/1 Advisory reference — outside the item-of-supply concept Trac Regulator Co., Inc. Dba Trac Regulator Co Inc |
NSN 5310-01-377-7320 is a Nut,plain,hexagon, manufactured by Trac Regulator Co., Inc. Dba Trac Regulator Co Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-377-7320 has 2 manufacturer part numbers on file: 164-19 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc), 40506-9 ITEM 25 (Trac Regulator Co., Inc. Dba Trac Regulator Co Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5999-01-384-4564, 6515-01-591-4321. Verify interchangeability with system specifications before substitution.
Key specifications for 40506-9 ITEM 25: Width Across Flats: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Temp Rating: 1000.0 FAHRENHEIT NOMINAL DEGF; Hardness Rating: 65.0 ROCKWELL B MINIMUM AND 95.0 ROCKWELL B MAXIMUM. 14 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.