PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1665Nut,plain,round

Microwave Engineering Corporation · NSN 5310-00-638-8429 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-638-8429 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-638-8429. Primary manufacturer part number: 1665.
Features
  • Nut,plain,round — FSC 5310
  • Material: COPPER ALLOY 360 OVERALL
  • Precious Material: SILVER
  • Material Document and Classification: QQ-B-611 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Nut Style: ROUND
  • Surface Treatment: SILVER OVERALL
  • Thread Quantity Per Inch: 24
  • Nominal Thread Size: 0.312 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy 360 Overall construction
General Description

The Nut,plain,round, cataloged under National Stock Number 5310-00-638-8429, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Microwave Engineering Corporation. Government technical data includes 13 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: Active.

Technical Specifications
ParameterValue
NSN5310-00-638-8429
Primary Part Number1665
Item NameNut,plain,round
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMicrowave Engineering Corporation
StatusACTIVE
MaterialCOPPER ALLOY 360 OVERALL
Precious MaterialSILVER
Material Document and ClassificationQQ-B-611 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Nut StyleROUND
Surface TreatmentSILVER OVERALL
Thread Quantity Per Inch24
Nominal Thread Size0.312 INCHES IN
Thread SeriesUNF
Nut Diameter1.455 INCHES MINIMUM AND 1.460 INCHES MAXIMUM IN
Width Across Flats0.430 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
Nut Thickness0.094 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Thread Class2B
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6240-00-241-9703CM1665 INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
5905-00-259-3935 INTERCHANGEABLE
Resistor,variable,wire Wound,non
5330-00-285-4841 INTERCHANGEABLE
Seal,plain Encased
3040-00-842-6098 INTERCHANGEABLE
Cylinder Assembly,actuating,line
5950-00-945-66711665 INTERCHANGEABLE
Coil,radio Frequency
American Precision Industries Inc.
5945-00-967-3616 INTERCHANGEABLE
Solenoid,electrical
6520-01-120-26571-665 INTERCHANGEABLE
Impression Tray,dental
Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia
4820-01-273-371420232-2 PL1841 INTERCHANGEABLE
Cap,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-273-373120229-2 PL1841 INTERCHANGEABLE
Guide,valve Stem
Leslie Controls, Inc. Dba Leslie Controls Inc
4820-01-284-487320-1.50IN SET 64PSI INTERCHANGEABLE
Valve,safety Relief
Anderson Greenwood Lp Dba Anderson Greenwood Crosby
Cross-Reference Index
Part NumberManufacturer
1665 PRIMARY Microwave Engineering Corporation (USA)
1665 Sierra Networks Inc Sierracom Div (USA)
Related Parts
6240-00-241-9703INTERCHANGEABLE
LAMP,INCANDESCENT
CM1665
5905-00-259-3935INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
5330-00-285-4841INTERCHANGEABLE
SEAL,PLAIN ENCASED
3040-00-842-6098INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
5950-00-945-6671INTERCHANGEABLE
COIL,RADIO FREQUENCY
1665
5945-00-967-3616INTERCHANGEABLE
SOLENOID,ELECTRICAL
6520-01-120-2657INTERCHANGEABLE
IMPRESSION TRAY,DENTAL
1-665
4820-01-273-3714INTERCHANGEABLE
CAP,VALVE
20232-2 PL1841
4820-01-273-3731INTERCHANGEABLE
GUIDE,VALVE STEM
20229-2 PL1841
4820-01-284-4873INTERCHANGEABLE
VALVE,SAFETY RELIEF
20-1.50IN SET 64PSI
5342-01-307-1920INTERCHANGEABLE
GUIDE,CLUTCH
1665
6150-01-350-0970INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
1665

Frequently Asked Questions

What is NSN 5310-00-638-8429?

NSN 5310-00-638-8429 is a Nut,plain,round, manufactured by Microwave Engineering Corporation, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-638-8429?

NSN 5310-00-638-8429 has 2 cross-referenced part numbers: 1665 (Microwave Engineering Corporation), 1665 (Sierra Networks Inc Sierracom Div).

What NSN replaces 5310-00-638-8429?

There are 12 known substitutes for 5310-00-638-8429: 6240-00-241-9703, 5905-00-259-3935, 5330-00-285-4841 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1665?

Key specifications for 1665: Material: COPPER ALLOY 360 OVERALL; Precious Material: SILVER; Material Document and Classification: QQ-B-611 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Nut Style: ROUND. 13 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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