PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5-16-18Nut,plain,square

Harnett Electric Corp · NSN 5310-00-958-3073 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-958-3073 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-958-3073. Primary manufacturer part number: 5-16-18.
Features
  • Nut,plain,square — FSC 5310
  • Nut Style: SQUARE
  • Thread Direction: RIGHT-HAND
  • Bearing Surface Type: FLAT
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Nominal Thread Size: 0.312 INCHES IN
  • Thread Quantity Per Inch: 18
  • Width Across Flats: 0.512 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Nut,plain,square, cataloged under National Stock Number 5310-00-958-3073, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Harnett Electric Corp. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-958-3073
Primary Part Number5-16-18
Item NameNut,plain,square
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHarnett Electric Corp
StatusACTIVE
Nut StyleSQUARE
Thread DirectionRIGHT-HAND
Bearing Surface TypeFLAT
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Size0.312 INCHES IN
Thread Quantity Per Inch18
Width Across Flats0.512 INCHES NOMINAL IN
Surface TreatmentPASSIVATE OVERALL
MaterialSTEEL CORROSION RESISTING OVERALL
Nut Height0.218 INCHES NOMINAL IN
Thread Class2B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5210-00-050-5705CE-6061 INTERCHANGEABLE
Caliper,micrometer,outside
Cornwell Quality Tools Company, the
5935-00-614-912151618 INTERCHANGEABLE
Connector Assembly,electrical
Hydro-Aire Aerospace Corp
5310-00-660-2810 INTERCHANGEABLE
Nut,plain,wing
2940-01-057-9691HP2 INTERCHANGEABLE
Filter Element,fluid
Honeywell International Inc Dba Honeywell Div Consumer Products Group
5305-01-254-24585/16-18 INTERCHANGEABLE
Screw,machine
Heimann Mfg Co Inc
5120-01-425-926551618 INTERCHANGEABLE
Wrench,box
Wright Tool Co
Cross-Reference Index
Part NumberManufacturer
5-16-18 Harnett Electric Corp
Related Parts
5210-00-050-5705INTERCHANGEABLE
CALIPER,MICROMETER,OUTSIDE
CE-6061
5935-00-614-9121INTERCHANGEABLE
CONNECTOR ASSEMBLY,ELECTRICAL
51618
5310-00-660-2810INTERCHANGEABLE
NUT,PLAIN,WING
2940-01-057-9691INTERCHANGEABLE
FILTER ELEMENT,FLUID
HP2
5305-01-254-2458INTERCHANGEABLE
SCREW,MACHINE
5/16-18
5120-01-425-9265INTERCHANGEABLE
WRENCH,BOX
51618

Frequently Asked Questions

What is NSN 5310-00-958-3073?

NSN 5310-00-958-3073 is a Nut,plain,square, manufactured by Harnett Electric Corp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-958-3073?

NSN 5310-00-958-3073 has 1 cross-referenced part number: 5-16-18 (Harnett Electric Corp).

What NSN replaces 5310-00-958-3073?

There are 6 known substitutes for 5310-00-958-3073: 5210-00-050-5705, 5935-00-614-9121, 5310-00-660-2810 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5-16-18?

Key specifications for 5-16-18: Nut Style: SQUARE; Thread Direction: RIGHT-HAND; Bearing Surface Type: FLAT; Thread Series: UNIFIED NATIONAL COARSE (UNC). 11 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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