PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66531Plug,machine Thread

Parker Hannifin Corporation Div Hydraulic Systems Division · NSN 5365-00-176-0874 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-176-0874 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-176-0874. Primary manufacturer part number: 66531.
Features
  • Plug,machine Thread — FSC 5365
  • Nominal Thread Size: 0.312 INCHES EXTERNAL IN
  • Core Depth: 0.360 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
  • Material: STEEL COMP 303 OVERALL
  • Connection Style: PLAIN
  • Surface Treatment: PASSIVATE OVERALL
  • Body Core Diameter: 0.140 INCHES MINIMUM AND 0.142 INCHES MAXIMUM IN
  • Head Height: 0.220 INCHES NOMINAL IN
Applications
  • Applications requiring Steel Comp 303 Overall construction
General Description

The Plug,machine Thread, cataloged under National Stock Number 5365-00-176-0874, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Parker Hannifin Corporation Div Hydraulic Systems Division. Government technical data includes 14 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5365-00-176-0874
Primary Part Number66531
Item NamePlug,machine Thread
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerParker Hannifin Corporation Div Hydraulic Systems Division
StatusACTIVE
Nominal Thread Size0.312 INCHES EXTERNAL IN
Core Depth0.360 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN
MaterialSTEEL COMP 303 OVERALL
Connection StylePLAIN
Surface TreatmentPASSIVATE OVERALL
Body Core Diameter0.140 INCHES MINIMUM AND 0.142 INCHES MAXIMUM IN
Head Height0.220 INCHES NOMINAL IN
Thread Length0.150 INCHES NOMINAL EXTERNAL IN
Thread Series DesignatorUNF EXTERNAL
Surface Treatment Document and ClassificationPS-102 FSCM 75250 MFR REF SINGLE TREATMENT RESPONSE OVERALL
Thread DirectionRIGHT-HAND EXTERNAL
Style DesignatorPLUG, MACHINE
Thread Class3A EXTERNAL A
Material Document and ClassificationASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
4730-00-132-4588246088N INTERCHANGEABLE
Insert,tube Fitting
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
5977-00-178-810566531 INTERCHANGEABLE
Brush,electrical Contact
Goodrich Corporation Dba Goodrich Corp
2810-00-306-635166531 INTERCHANGEABLE
Poppet,exhaust
Textron Lycoming Inc Williamsport Plant
4010-00-813-4265 INTERCHANGEABLE
Guy
5307-00-930-791166531 INTERCHANGEABLE
Stud,special
Naval Inventory Control Point Mechanicsburg
6150-01-062-9195600573 INTERCHANGEABLE
Harness,electric
Unison Industries Llc
5985-01-528-2484AS398-03 INTERCHANGEABLE
Attenuator,fixed
Spectrum Control, Inc.
Cross-Reference Index
Part NumberManufacturer
66531 PRIMARY Parker Hannifin Corporation Div Hydraulic Systems Division (USA)
Related Parts
4730-00-132-4588INTERCHANGEABLE
INSERT,TUBE FITTING
246088N
5977-00-178-8105INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
66531
2810-00-306-6351INTERCHANGEABLE
POPPET,EXHAUST
66531
4010-00-813-4265INTERCHANGEABLE
GUY
5307-00-930-7911INTERCHANGEABLE
STUD,SPECIAL
66531
6150-01-062-9195INTERCHANGEABLE
HARNESS,ELECTRIC
600573
5985-01-528-2484INTERCHANGEABLE
ATTENUATOR,FIXED
AS398-03

Frequently Asked Questions

What is NSN 5365-00-176-0874?

NSN 5365-00-176-0874 is a Plug,machine Thread, manufactured by Parker Hannifin Corporation Div Hydraulic Systems Division, classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-00-176-0874?

NSN 5365-00-176-0874 has 1 cross-referenced part number: 66531 (Parker Hannifin Corporation Div Hydraulic Systems Division).

What NSN replaces 5365-00-176-0874?

There are 7 known substitutes for 5365-00-176-0874: 4730-00-132-4588, 5977-00-178-8105, 2810-00-306-6351 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 66531?

Key specifications for 66531: Nominal Thread Size: 0.312 INCHES EXTERNAL IN; Core Depth: 0.360 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN; Material: STEEL COMP 303 OVERALL; Connection Style: PLAIN. 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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