PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ST5M1291B1Connector,receptacle,electrical

The Boeing Company Div Defense · NSN 5935-01-039-8390 · FSC 5935 · No Item Name Available
Verified by PartsTable
NSN 5935-01-039-8390 — this item is cataloged by the U.S. Government under National Stock Number 5935-01-039-8390. Primary manufacturer part number: ST5M1291B1.
Features
  • Connector,receptacle,electrical — FSC 5935
  • Thread Class: 2A A
  • Distance From Mounting Shoulder to Front Face: 0.640 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN
  • Mounting Facility Thickness: 0.300 INCHES NOMINAL IN
  • Body Style: STRAIGHT SHAPE, EXTERNAL COUPLING
  • Environmental Protection: MOISTURE RESISTANT AND VIBRATION RESISTANT AND SALT WATER RESISTANT AND HERMETIC
  • Nominal Thread Length: 0.315 INCHES IN
  • Shell Material: STEEL CORROSION RESISTING
Applications
  • Electrical interconnection
  • Signal interface mating
  • Quick-disconnect coupling
General Description

The Connector,receptacle,electrical, cataloged under National Stock Number 5935-01-039-8390, is classified within Federal Supply Class 5935 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is The Boeing Company Div Defense. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, 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
NSN5935-01-039-8390
Primary Part NumberST5M1291B1
Item NameConnector,receptacle,electrical
FSC / FSG5935 / 59 — No Item Name Available
ManufacturerThe Boeing Company Div Defense
StatusACTIVE
Thread Class2A A
Distance From Mounting Shoulder to Front Face0.640 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN
Mounting Facility Thickness0.300 INCHES NOMINAL IN
Body StyleSTRAIGHT SHAPE, EXTERNAL COUPLING
Environmental ProtectionMOISTURE RESISTANT AND VIBRATION RESISTANT AND SALT WATER RESISTANT AND HERMETIC
Nominal Thread Length0.315 INCHES IN
Shell MaterialSTEEL CORROSION RESISTING
Precious Material and LocationCONTACT SURFACES GOLD
Overall Diameter1.110 INCHES MINIMUM AND 1.120 INCHES MAXIMUM IN
Mating End Quantity1
Bushing Accommodation Hole ShapeROUND
Included Contact TypeROUND PIN SINGLE MATING END SINGLE CONTACT GROUPING
Contact Surface Treatment Document and ClassificationMIL-G-45204 MIL SPEC SINGLE TREATMENT RESPONSE SINGLE MATING END SINGLE CONTACT GROUPING
Thread Quantity Per Inch20 AND 24
Terminal TypeCRIMP SINGLE MATING END SINGLE CONTACT GROUPING
Contact MaterialCOPPER ALLOY SINGLE MATING END SINGLE CONTACT GROUPING
Threaded Device TypeBACK SHELL AND MOUNTING BUSHING
Thread Series DesignatorUNEF
Connector Locking MethodBAYONET PIN
Nominal Thread Size0.688 INCHES AND 0.875 INCHES IN
Insert Position in Deg0.0
Precious Material and Weight0.025 GOLD GRAINS, TROY
Contact RemovabilityREMOVABLE SINGLE MATING END SINGLE CONTACT GROUPING
Included Contact Quantity5 SINGLE MATING END SINGLE CONTACT GROUPING
Contact Surface TreatmentGOLD SINGLE MATING END SINGLE CONTACT GROUPING
Contact Position Arrangement Style10-5 SINGLE MATING END
Shell Surface TreatmentPASSIVATE
Terminal LocationBACK SINGLE MATING END SINGLE CONTACT GROUPING
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3431-00-018-830345V26 INTERCHANGEABLE
Collet Body,welding Torch
Esab Group, Inc., the Dba Esab Welding and Cutting Products Div Esab Welding and Cuttng
3120-00-287-8054517415-12 INTERCHANGEABLE
Bearing,washer,thrust
Instruments and Flight Research, Inc.
5306-01-276-580218503 INTERCHANGEABLE
Bolt,eye
Jergens Inc Div Tooling Components Division
2530-01-287-445112758 INTERCHANGEABLE
Brake,shoe Type
Silver Eagle Manufacturing Co
2990-01-498-1417 INTERCHANGEABLE
Pipe,exhaust
6230-01-548-966780122 INTERCHANGEABLE
Reflector,lamp
Uke Corporation Dba Uke Corp Div Mustafa T Uke & Alan K Uke Partners
Cross-Reference Index
Part NumberManufacturer
S8202H10B5P Enviro-Seal Inc Dba Electronic Seals Co (USA)
10-599342-05P Amphenol Corp Div Amphenol Aerospace Operations (USA)
10-499492-05P Amphenol Corp Div Amphenol Aerospace Operations (USA)
18503 Sealtron, Inc. (USA)
ST5M1291B1 PRIMARY The Boeing Company Div Defense (USA)
S8202H10B5P-1L4 Enviro-Seal Inc Dba Electronic Seals Co (USA)
Related Parts
3431-00-018-8303INTERCHANGEABLE
COLLET BODY,WELDING TORCH
45V26
3120-00-287-8054INTERCHANGEABLE
BEARING,WASHER,THRUST
517415-12
5306-01-276-5802INTERCHANGEABLE
BOLT,EYE
18503
2530-01-287-4451INTERCHANGEABLE
BRAKE,SHOE TYPE
12758
2990-01-498-1417INTERCHANGEABLE
PIPE,EXHAUST
6230-01-548-9667INTERCHANGEABLE
REFLECTOR,LAMP
80122

Frequently Asked Questions

What is NSN 5935-01-039-8390?

NSN 5935-01-039-8390 is a Connector,receptacle,electrical, manufactured by The Boeing Company Div Defense, classified under FSC 5935 (No Item Name Available). Status: active.

What are the part numbers for NSN 5935-01-039-8390?

NSN 5935-01-039-8390 has 6 cross-referenced part numbers: S8202H10B5P (Enviro-Seal Inc Dba Electronic Seals Co), 10-599342-05P (Amphenol Corp Div Amphenol Aerospace Operations), 10-499492-05P (Amphenol Corp Div Amphenol Aerospace Operations), 18503 (Sealtron, Inc.), ST5M1291B1 (The Boeing Company Div Defense) and 1 more.

What NSN replaces 5935-01-039-8390?

There are 6 known substitutes for 5935-01-039-8390: 3431-00-018-8303, 3120-00-287-8054, 5306-01-276-5802 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ST5M1291B1?

Key specifications for ST5M1291B1: Thread Class: 2A A; Distance From Mounting Shoulder to Front Face: 0.640 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN; Mounting Facility Thickness: 0.300 INCHES NOMINAL IN; Body Style: STRAIGHT SHAPE, EXTERNAL COUPLING. 30 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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