PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3-1261Nut,plain,hexagon

Tactair Fluid Controls Inc Western Hydraulics Div · NSN 5310-00-062-0585 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-062-0585 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-062-0585. Primary manufacturer part number: 3-1261.
Features
  • Nut,plain,hexagon — FSC 5310
  • Nut Height: 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
  • Width Across Flats: 2.620 INCHES NOMINAL IN
  • Thread Series: UN
  • Bearing Surface Type: FLAT
  • Hole Configuration Style: CONFIGURATION B
  • Nominal Thread Size: 2.250 INCHES IN
  • Thread Quantity Per Inch: 12
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 4130 Overall construction
General Description

The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-062-0585, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Tactair Fluid Controls Inc Western Hydraulics Div. Government technical data includes 15 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
NSN5310-00-062-0585
Primary Part Number3-1261
Item NameNut,plain,hexagon
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTactair Fluid Controls Inc Western Hydraulics Div
StatusACTIVE
Nut Height0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN
Width Across Flats2.620 INCHES NOMINAL IN
Thread SeriesUN
Bearing Surface TypeFLAT
Hole Configuration StyleCONFIGURATION B
Nominal Thread Size2.250 INCHES IN
Thread Quantity Per Inch12
Drilled Hole Diameter0.063 INCHES NOMINAL IN
Hole Type and Quantity3 DRILLED
Surface TreatmentCADMIUM OVERALL
Thread Class3B
Material Document and ClassificationMIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialSTEEL COMP 4130 OVERALL
Thread DirectionRIGHT-HAND
Nut StyleHEXAGON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5330-00-684-31328-910 INTERCHANGEABLE
Retainer,packing
Pdi Ground Support Systems, Inc.
5935-00-810-39325M2113-001 INTERCHANGEABLE
Connector,receptacle,electrical
The Boeing Company Div Defense
5310-01-188-066131261 INTERCHANGEABLE
Nut,disk Valve
Flowserve Inc
5340-01-219-4483 INTERCHANGEABLE
Standoff,threaded,spacing
2530-01-226-1884031261 INTERCHANGEABLE
Parts Kit,hydraulic Brake Wheel
Caterpillar Inc Div Caterpillar Defense
2915-01-581-196331261 INTERCHANGEABLE
Nozzle,fuel Injection
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
Cross-Reference Index
Part NumberManufacturer
3-1261 PRIMARY Tactair Fluid Controls Inc Western Hydraulics Div (USA)
Related Parts
5330-00-684-3132INTERCHANGEABLE
RETAINER,PACKING
8-910
5935-00-810-3932INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5M2113-001
5310-01-188-0661INTERCHANGEABLE
NUT,DISK VALVE
31261
5340-01-219-4483INTERCHANGEABLE
STANDOFF,THREADED,SPACING
2530-01-226-1884INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE WHEEL
031261
2915-01-581-1963INTERCHANGEABLE
NOZZLE,FUEL INJECTION
31261

Frequently Asked Questions

What is NSN 5310-00-062-0585?

NSN 5310-00-062-0585 is a Nut,plain,hexagon, manufactured by Tactair Fluid Controls Inc Western Hydraulics Div, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-062-0585?

NSN 5310-00-062-0585 has 1 cross-referenced part number: 3-1261 (Tactair Fluid Controls Inc Western Hydraulics Div).

What NSN replaces 5310-00-062-0585?

There are 6 known substitutes for 5310-00-062-0585: 5330-00-684-3132, 5935-00-810-3932, 5310-01-188-0661 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3-1261?

Key specifications for 3-1261: Nut Height: 0.290 INCHES MINIMUM AND 0.300 INCHES MAXIMUM IN; Width Across Flats: 2.620 INCHES NOMINAL IN; Thread Series: UN; Bearing Surface Type: FLAT. 15 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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