PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FFN836TYPE5STYLE1Nut,plain,castellated,hexagon

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5310-00-221-4695 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-221-4695 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-221-4695. Primary manufacturer part number: FFN836TYPE5STYLE1.
Features
  • Nut,plain,castellated,hexagon — FSC 5310
  • Thread Series: UNF
  • Nut Height: 0.320 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
  • Nominal Thread Size: 0.312 INCHES IN
  • Bearing Surface Type: CHAMFERED OR WASHER FACED
  • Nut Style: CASTELLATED, HEXAGON
  • Nondefinitive Spec/std Data: 5 TYPE AND 1 STYLE
  • Thread Quantity Per Inch: 24
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-00-221-4695, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-221-4695
Primary Part NumberFFN836TYPE5STYLE1
Item NameNut,plain,castellated,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusCANCELLED
Thread SeriesUNF
Nut Height0.320 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN
Nominal Thread Size0.312 INCHES IN
Bearing Surface TypeCHAMFERED OR WASHER FACED
Nut StyleCASTELLATED, HEXAGON
Nondefinitive Spec/std Data5 TYPE AND 1 STYLE
Thread Quantity Per Inch24
Width Across Flats0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
MaterialSTEEL OVERALL
Thread DirectionRIGHT-HAND
Thread Class2B
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6625-00-070-6404500004 INTERCHANGEABLE
Board Assy,componen
North Atlantic Industries, Inc. Dba North Atlantic Industries
6625-00-080-4276500-004 INTERCHANGEABLE
Ammeter
American Instrument Corp
5310-00-167-1289AN310-8 INTERCHANGEABLE
Nut,plain,castellated,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5310-00-221-46961B4442 INTERCHANGEABLE
Nut,plain,castellated,hexagon
Caterpillar Inc Div Caterpillar Defense
5310-00-221-4705 INTERCHANGEABLE
Nut,plain,castellated,hexagon
5310-00-221-4708 INTERCHANGEABLE
Nut,plain,castellated,hexagon
5310-00-262-5959 INTERCHANGEABLE
Nut,plain,castellated,hexagon
5310-00-273-7740 INTERCHANGEABLE
Nut,plain,castellated,hexagon
5310-00-273-77533229145 INTERCHANGEABLE
Nut,plain,castellated,hexagon
Hatch & Kirk, Inc.
5310-00-274-77053237327 INTERCHANGEABLE
Nut,plain,castellated,hexagon
Hatch & Kirk, Inc.
Cross-Reference Index
Part NumberManufacturer
FFN836TYPE5STYLE1 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
500004 Dana Corp Spicer Transmission Div (USA)
Related Parts
6625-00-070-6404INTERCHANGEABLE
BOARD ASSY,COMPONEN
500004
6625-00-080-4276INTERCHANGEABLE
AMMETER
500-004
5310-00-167-1289INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
AN310-8
5310-00-221-4696INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
1B4442
5310-00-221-4705INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
5310-00-221-4708INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
5310-00-262-5959INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
5310-00-273-7740INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
5310-00-273-7753INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
3229145
5310-00-274-7705INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
3237327
2520-00-319-0148INTERCHANGEABLE
TRANSMISSION,MECHANICAL,VEHICULA
4A86
5310-00-551-7870INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON

Frequently Asked Questions

What is NSN 5310-00-221-4695?

NSN 5310-00-221-4695 is a Nut,plain,castellated,hexagon, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-221-4695?

NSN 5310-00-221-4695 has 2 cross-referenced part numbers: FFN836TYPE5STYLE1 (Federal Specifications Promulgated by General Services Administration Washington DC), 500004 (Dana Corp Spicer Transmission Div).

What NSN replaces 5310-00-221-4695?

There are 12 known substitutes for 5310-00-221-4695: 6625-00-070-6404, 6625-00-080-4276, 5310-00-167-1289 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FFN836TYPE5STYLE1?

Key specifications for FFN836TYPE5STYLE1: Thread Series: UNF; Nut Height: 0.320 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN; Nominal Thread Size: 0.312 INCHES IN; Bearing Surface Type: CHAMFERED OR WASHER FACED. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-221-4695 still in active supply?

NSN 5310-00-221-4695 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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