PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2666Nut,plain,hexagon

Tyco Fire Products Lp · NSN 5310-01-009-6978 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-009-6978 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-009-6978. Primary manufacturer part number: 2666.
Features
  • Nut,plain,hexagon — FSC 5310
  • Surface Treatment: CADMIUM OVERALL
  • Nut Height: 0.125 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Thread Class: 2B
  • Width Across Flats: 0.365 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 24
  • Bearing Surface Type: WASHER FACED
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-009-6978, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Tyco Fire Products Lp. 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-009-6978
Primary Part Number2666
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTyco Fire Products Lp
StatusACTIVE
Surface TreatmentCADMIUM OVERALL
Nut Height0.125 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Thread Class2B
Width Across Flats0.365 INCHES NOMINAL IN
Thread Quantity Per Inch24
Bearing Surface TypeWASHER FACED
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Nominal Thread Size0.190 INCHES IN
Nut StyleHEXAGON
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5975-00-296-0762J3356 INTERCHANGEABLE
Rod,ground
Joslyn Corp
5310-00-297-89422666 INTERCHANGEABLE
Nut,plain,hexagon
Telemechanics Inc
2530-00-430-9527 INTERCHANGEABLE
Parts Kit,hydraulic Brake Master
5325-00-489-30831068D100ITEMS INTERCHANGEABLE
Grommet,nonmetallic
S F Appliance Ltd
5330-00-559-2490282-7804-805031PC2666 INTERCHANGEABLE
Gasket
Naval Ship Systems Command
5310-00-998-32352666 INTERCHANGEABLE
Washer,shouldered
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
2940-01-123-268142666 INTERCHANGEABLE
Filter Element,intake Air Cleane
Wix Corp
5355-01-292-46842666 INTERCHANGEABLE
Dial,control
Bi Technologies Corporation Div Bi Technologies Corp.
4530-01-368-76212666 INTERCHANGEABLE
Burner,oil,pressure Atomizing
Rosco Mfg Co
Cross-Reference Index
Part NumberManufacturer
2666 PRIMARY Tyco Fire Products Lp (USA)
Related Parts
5975-00-296-0762INTERCHANGEABLE
ROD,GROUND
J3356
5310-00-297-8942INTERCHANGEABLE
NUT,PLAIN,HEXAGON
2666
2530-00-430-9527INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE MASTER
5325-00-489-3083INTERCHANGEABLE
GROMMET,NONMETALLIC
1068D100ITEMS
5330-00-559-2490INTERCHANGEABLE
GASKET
282-7804-805031PC2666
5310-00-998-3235INTERCHANGEABLE
WASHER,SHOULDERED
2666
2940-01-123-2681INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
42666
5355-01-292-4684INTERCHANGEABLE
DIAL,CONTROL
2666
4530-01-368-7621INTERCHANGEABLE
BURNER,OIL,PRESSURE ATOMIZING
2666

Frequently Asked Questions

What is NSN 5310-01-009-6978?

NSN 5310-01-009-6978 is a Nut,plain,hexagon, manufactured by Tyco Fire Products Lp, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-009-6978?

NSN 5310-01-009-6978 has 1 cross-referenced part number: 2666 (Tyco Fire Products Lp).

What NSN replaces 5310-01-009-6978?

There are 9 known substitutes for 5310-01-009-6978: 5975-00-296-0762, 5310-00-297-8942, 2530-00-430-9527 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2666?

Key specifications for 2666: Surface Treatment: CADMIUM OVERALL; Nut Height: 0.125 INCHES NOMINAL IN; Material: STEEL OVERALL; Thread Class: 2B. 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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