PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

556189KFFNut,plain,hexagon

Chief of Engineers Dept of Army · NSN 5310-00-276-8612 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-276-8612 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-276-8612. Primary manufacturer part number: 556189KFF.
Features
  • Nut,plain,hexagon — FSC 5310
  • Width Across Flats: 0.578 INCHES NOMINAL IN
  • Nominal Thread Size: 0.312 INCHES IN
  • Thread Series: UNIFIED NATIONAL COARSE (UNC)
  • Bearing Surface Type: WASHER FACED
  • Thread Quantity Per Inch: 18
  • Thread Class: 2B
  • Thread Direction: RIGHT-HAND
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 5310-00-276-8612, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Chief of Engineers Dept of Army. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-276-8612
Primary Part Number556189KFF
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerChief of Engineers Dept of Army
StatusACTIVE
Width Across Flats0.578 INCHES NOMINAL IN
Nominal Thread Size0.312 INCHES IN
Thread SeriesUNIFIED NATIONAL COARSE (UNC)
Bearing Surface TypeWASHER FACED
Thread Quantity Per Inch18
Thread Class2B
Thread DirectionRIGHT-HAND
Nut StyleHEXAGON
Nut Height0.188 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5905-00-100-3027 INTERCHANGEABLE
Resistor,fixed,wire Wound
3110-00-100-981407087 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5995-00-164-6494SC-D-27457 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5940-00-187-5099189 INTERCHANGEABLE
Terminal,lug
Zierick Mfg Corp
6350-00-369-4126 INTERCHANGEABLE
Horn,signal
5360-00-526-3468 INTERCHANGEABLE
Spring,helical,compression
4820-00-554-9951189 INTERCHANGEABLE
Valve,safety Relief
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
5680-00-711-1531189 INTERCHANGEABLE
Frameanddoor,cleano
Federal Prison Industries, Inc - Ebg
3610-00-784-5079 INTERCHANGEABLE
Cam,cast Iron
6160-00-850-5268189 INTERCHANGEABLE
Retainer,battery
Keystone Electronics Corp
Cross-Reference Index
Part NumberManufacturer
556189KFF Chief of Engineers Dept of Army (USA)
KFF189 Dakota Fire Apparatus Co Inc (USA)
189 W S Darley & Co (USA)
Related Parts
5905-00-100-3027INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
3110-00-100-9814INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
07087
5995-00-164-6494INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
SC-D-27457
5940-00-187-5099INTERCHANGEABLE
TERMINAL,LUG
189
6350-00-369-4126INTERCHANGEABLE
HORN,SIGNAL
5360-00-526-3468INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
4820-00-554-9951INTERCHANGEABLE
VALVE,SAFETY RELIEF
189
5680-00-711-1531INTERCHANGEABLE
FRAMEANDDOOR,CLEANO
189
3610-00-784-5079INTERCHANGEABLE
CAM,CAST IRON
6160-00-850-5268INTERCHANGEABLE
RETAINER,BATTERY
189
4820-00-965-1215INTERCHANGEABLE
VALVE,SAFETY RELIEF
6240-01-015-7791INTERCHANGEABLE
LAMP,INCANDESCENT
578R991H02

Frequently Asked Questions

What is NSN 5310-00-276-8612?

NSN 5310-00-276-8612 is a Nut,plain,hexagon, manufactured by Chief of Engineers Dept of Army, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-276-8612?

NSN 5310-00-276-8612 has 3 cross-referenced part numbers: 556189KFF (Chief of Engineers Dept of Army), KFF189 (Dakota Fire Apparatus Co Inc), 189 (W S Darley & Co).

What NSN replaces 5310-00-276-8612?

There are 12 known substitutes for 5310-00-276-8612: 5905-00-100-3027, 3110-00-100-9814, 5995-00-164-6494 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 556189KFF?

Key specifications for 556189KFF: Width Across Flats: 0.578 INCHES NOMINAL IN; Nominal Thread Size: 0.312 INCHES IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Bearing Surface Type: WASHER FACED. 10 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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