PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

321531Plug,machine Thread

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5365-00-565-4920 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-565-4920 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-565-4920. Primary manufacturer part number: 321531.
Features
  • Plug,machine Thread — FSC 5365
  • Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OR AMS 2412 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
  • Head Type: CORED
  • Material: STEEL OVERALL
  • Connection Style: PLAIN
  • Style Designator: PLUG, MACHINE
  • Head Core Diameter: 0.750 INCHES NOMINAL IN
  • Surface Treatment: SILVER OVERALL
Applications
  • Applications requiring Steel Overall construction
General Description

The Plug,machine Thread, cataloged under National Stock Number 5365-00-565-4920, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 20 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5365-00-565-4920
Primary Part Number321531
Item NamePlug,machine Thread
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusACTIVE
Surface Treatment Document and ClassificationAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OR AMS 2412 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Head TypeCORED
MaterialSTEEL OVERALL
Connection StylePLAIN
Style DesignatorPLUG, MACHINE
Head Core Diameter0.750 INCHES NOMINAL IN
Surface TreatmentSILVER OVERALL
Thread Series DesignatorUN EXTERNAL
Nominal Thread Size1.750 INCHES EXTERNAL IN
Body Core Diameter1.100 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND EXTERNAL
Flange Thickness0.070 INCHES NOMINAL IN
Material Document and ClassificationAMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 6323 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Thread Quantity Per Inch12 EXTERNAL
Thread Class3A EXTERNAL A
Flange Diameter1.125 INCHES NOMINAL IN
Head Height0.400 INCHES NOMINAL IN
Thread Length0.335 INCHES NOMINAL EXTERNAL IN
Core Depth0.620 INCHES NOMINAL IN
Precious MaterialSILVER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
2990-01-068-6151321531 INTERCHANGEABLE
Housing Stater
Caterpillar Inc Div Caterpillar Defense
5305-01-110-8470321531 INTERCHANGEABLE
Screw
Brp Us Inc
5999-01-469-997132153-1 INTERCHANGEABLE
Heat Sink,electrical-Electronic
United States Department of the Navy Dba Naval Surface Warfare Center Panama City
Cross-Reference Index
Part NumberManufacturer
321531 Royal Oak Gage, Inc (USA)
321531 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
2990-01-068-6151INTERCHANGEABLE
HOUSING STATER
321531
5305-01-110-8470INTERCHANGEABLE
SCREW
321531
5999-01-469-9971INTERCHANGEABLE
HEAT SINK,ELECTRICAL-ELECTRONIC
32153-1

Frequently Asked Questions

What is NSN 5365-00-565-4920?

NSN 5365-00-565-4920 is a Plug,machine Thread, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-00-565-4920?

NSN 5365-00-565-4920 has 2 cross-referenced part numbers: 321531 (Royal Oak Gage, Inc), 321531 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).

What NSN replaces 5365-00-565-4920?

There are 3 known substitutes for 5365-00-565-4920: 2990-01-068-6151, 5305-01-110-8470, 5999-01-469-9971. Verify interchangeability with system specifications before substitution.

What are the specifications of 321531?

Key specifications for 321531: Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OR AMS 2412 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Head Type: CORED; Material: STEEL OVERALL; Connection Style: PLAIN. 22 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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