PartsTable TECHNICAL DATA SHEET
NSN 5310-01-381-3916Government record, cited

Nut, Plain, Castellated, Hexagon5310-01-381-3916

NSN 5310-01-381-3916 · NIIN 013813916 · Part number 371642
Earnest Machine Products Co · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 0DUK0
Government record, cited
NSN 5310-01-381-3916 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-381-3916. Manufacturer of record part number: 371642.
Also searched as  5310-01-381-3916 · 5310013813916 · NIIN 013813916 · 01-381-3916 · FSC 5310 Nuts and Washers · CAGE 0DUK0 · 371642
Nearby stock numbers  ·
Features
  • Nut,plain,castellated,hexagon — FSC 5310
  • Width Across Flats: 3.000 INCHES NOMINAL IN
  • Thread Series: UNF
  • Thread Direction: RIGHT-HAND
  • Nominal Thread Size: 2.000 INCHES IN
  • Nut Height: 1.969 INCHES NOMINAL IN
  • Nut Style: CASTELLATED, HEXAGON
  • Thread Class: 2B
Identification
  • NSN: 5310-01-381-3916
  • NIIN: 013813916
  • FSC: 5310 — Nuts and Washers
  • FSG: 53 — Hardware and Abrasives
  • Primary part number: 371642
  • Manufacturer: Earnest Machine Products Co
General Description

The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-01-381-3916, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Earnest Machine Products Co. Government technical data includes 10 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. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-381-3916
Primary Part Number371642
Item NameNut,plain,castellated,hexagon
FSC / FSG5310 / 53 — Nuts and Washers
ManufacturerEarnest Machine Products Co
StatusACTIVE
Width Across Flats3.000 INCHES NOMINAL IN
Thread SeriesUNF
Thread DirectionRIGHT-HAND
Nominal Thread Size2.000 INCHES IN
Nut Height1.969 INCHES NOMINAL IN
Nut StyleCASTELLATED, HEXAGON
Thread Class2B
Thread Quantity Per Inch12
MaterialSTEEL OVERALL
Bearing Surface TypeCHAMFERED OR WASHER FACED
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
Cross-Reference Index
Part NumberManufacturer
371642 PRIMARY Earnest Machine Products Co (USA)
No interchangeability data on file.
Other items in FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040
5310-00-000-0040 · Item name not on file
5310-00-000-0077
NUT,PLAIN,ROUND
5310-00-000-0079
WASHER,FLAT
5310-00-000-0079
WASHER,FLAT
5310-00-000-1146
5310-00-000-1146 · Item name not on file
5310-00-000-3815
5310-00-000-3815 · Item name not on file
5310-00-000-4532
5310-00-000-4532 · Item name not on file
5310-00-000-4540
5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-01-381-3916?

NSN 5310-01-381-3916 is a Nut,plain,castellated,hexagon, manufactured by Earnest Machine Products Co, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-381-3916?

NSN 5310-01-381-3916 has 1 manufacturer part number on file: 371642 (Earnest Machine Products Co).

What are the specifications of 371642?

Key specifications for 371642: Width Across Flats: 3.000 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 2.000 INCHES IN. 10 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-381-3916 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

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.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
PartsTable Design LLC · partstable.com