PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40166Nut,plain,extended Washer,hexago

Fastenal Company Dba Fastenal Co · NSN 5310-01-556-5555 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-556-5555 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-556-5555. Primary manufacturer part number: 40166.
Features
  • Nut,plain,extended Washer,hexago — FSC 5310
  • 7 verified cross-references
  • Primary manufacturer: Fastenal Company Dba Fastenal Co
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-556-5555, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Fastenal Company Dba Fastenal Co. This item has 7 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameNut,plain,extended Washer,hexago
FSC / FSG5310 — No Item Name Available (FSG 53)
ManufacturersNavistar Intl Corp Truck Br Ohio Plant (CAGE 89346); Nd Defense Llc (CAGE 338X5); Fastenal Company Dba Fastenal Co (CAGE 0Y3H3); General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp (CAGE 1EFH8); Anixter (CAGE 03KT1)
Technical Specifications
ParameterValue
NSN5310-01-556-5555
Primary Part Number40166
Item NameNut,plain,extended Washer,hexago
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFastenal Company Dba Fastenal Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-012-0492648690 INTERCHANGEABLE
Packing with Retainer
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
5330-00-154-836324226 INTERCHANGEABLE
Seal,plain Encased
Dressta North America Ltd
3825-00-374-69243540166 INTERCHANGEABLE
Coupling Assembly,s
Sicard a Division of Smi-Snowblast Inc Dba Sicard
5999-00-424-982740-166 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
6625-01-037-0058AM0170 INTERCHANGEABLE
Ammeter
Faria Beede Instruments, Inc. Dba Faria Beede Instruments Inc
6680-01-149-011240166 INTERCHANGEABLE
Transmitter,liquid Quantity
Setra Systems, Inc. Dba Gems Sensors
2910-01-291-590240166 INTERCHANGEABLE
Pump,fuel,electrical
Purolator Products Co Div Motor Components, Llc
5985-01-463-70239804-20A0 INTERCHANGEABLE
Attenuator,variable
Antenna & Radome Research Associates Corp Dba Arra Inc Div Arra Inc
5310-01-512-613190702 INTERCHANGEABLE
Nut,plain,hexagon
Fastenal Company Dba Fastenal Co
5310-01-512-614190700 INTERCHANGEABLE
Nut,self-Locking,plate
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
31083R1 Navistar Intl Corp Truck Br Ohio Plant (USA)
ESP-EM-3.104-PP Nd Defense Llc (USA)
40166 PRIMARY Fastenal Company Dba Fastenal Co (USA)
3011562 General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp (USA)
31083R1 Nd Defense Llc (USA)
31083R1 Anixter (USA)
12759-00532 Fastenal Company Dba Fastenal Co (USA)
Related Parts
5330-00-012-0492INTERCHANGEABLE
PACKING WITH RETAINER
648690
5330-00-154-8363INTERCHANGEABLE
SEAL,PLAIN ENCASED
24226
3825-00-374-6924INTERCHANGEABLE
COUPLING ASSEMBLY,S
3540166
5999-00-424-9827INTERCHANGEABLE
CONTACT,ELECTRICAL
40-166
6625-01-037-0058INTERCHANGEABLE
AMMETER
AM0170
6680-01-149-0112INTERCHANGEABLE
TRANSMITTER,LIQUID QUANTITY
40166
2910-01-291-5902INTERCHANGEABLE
PUMP,FUEL,ELECTRICAL
40166
5985-01-463-7023INTERCHANGEABLE
ATTENUATOR,VARIABLE
9804-20A0
5310-01-512-6131INTERCHANGEABLE
NUT,PLAIN,HEXAGON
90702
5310-01-512-6141INTERCHANGEABLE
NUT,SELF-LOCKING,PLATE
90700
5310-01-512-6142INTERCHANGEABLE
NUT,PLAIN,EXTENDED WASHER,HEXAGO
5310-01-533-7050INTERCHANGEABLE
NUT,PLAIN,EXTENDED WASHER,HEXAGO
40233R1

Frequently Asked Questions

What is NSN 5310-01-556-5555?

NSN 5310-01-556-5555 is a Nut,plain,extended Washer,hexago, manufactured by Fastenal Company Dba Fastenal Co, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-556-5555?

NSN 5310-01-556-5555 has 7 cross-referenced part numbers: 31083R1 (Navistar Intl Corp Truck Br Ohio Plant), ESP-EM-3.104-PP (Nd Defense Llc), 40166 (Fastenal Company Dba Fastenal Co), 3011562 (General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp), 31083R1 (Nd Defense Llc) and 2 more.

What NSN replaces 5310-01-556-5555?

There are 12 known substitutes for 5310-01-556-5555: 5330-00-012-0492, 5330-00-154-8363, 3825-00-374-6924 and 9 more. Verify interchangeability with system specifications before substitution.

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