PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3631-D-91Terminal,stud

Lyn-Tron, Inc. Dba Lyn-Tron Inc · NSN 5940-00-079-8638 · FSC 5940 · No Item Name Available
Verified by PartsTable
NSN 5940-00-079-8638 — this item is cataloged by the U.S. Government under National Stock Number 5940-00-079-8638. Primary manufacturer part number: 3631-D-91.
Features
  • Terminal,stud — FSC 5940
  • Thru-Hole Diameter: 0.040 INCHES IN
  • Surface Treatment: SILVER CONDUCTOR ACCOMMODATION SINGLE LAYER
  • Swage Depth: 0.165 INCHES IN
  • Largest Width: 0.125 INCHES SINGLE END IN
  • Material: COPPER ALLOY CONDUCTOR ACCOMMODATION
  • Surface Treatment: SILVER MOUNTING FACILITY SINGLE LAYER
  • Swage Outside Diameter: 0.125 INCHES IN
Applications
  • Applications requiring Copper Alloy Conductor Accommodation construction
General Description

The Terminal,stud, cataloged under National Stock Number 5940-00-079-8638, is classified within Federal Supply Class 5940 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Lyn-Tron, Inc. Dba Lyn-Tron Inc. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5940-00-079-8638
Primary Part Number3631-D-91
Item NameTerminal,stud
FSC / FSG5940 / 59 — No Item Name Available
ManufacturerLyn-Tron, Inc. Dba Lyn-Tron Inc
StatusACTIVE
Thru-Hole Diameter0.040 INCHES IN
Surface TreatmentSILVER CONDUCTOR ACCOMMODATION SINGLE LAYER
Swage Depth0.165 INCHES IN
Largest Width0.125 INCHES SINGLE END IN
MaterialCOPPER ALLOY CONDUCTOR ACCOMMODATION
Surface TreatmentSILVER MOUNTING FACILITY SINGLE LAYER
Swage Outside Diameter0.125 INCHES IN
Slot Width0.063 INCHES SINGLE END IN
Terminal Length0.200 INCHES IN
Slot Depth0.200 INCHES SINGLE END IN
Material Document and ClassificationQQ-B-626,1/2H FED SPEC SINGLE MATERIAL RESPONSE MOUNTING FACILITY
Conductor Accommodation TypeBIFURCATED U-FORK SINGLE END
Basic Shape StyleNONTUBULAR, ROUND
Electrical Insulation FeatureUNINSULATED
Overall Diameter0.125 INCHES IN
Mounting Method StyleSWAGE
Minor Bushing Length0.165 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
3020-00-270-2211290300PC3 INTERCHANGEABLE
Gear,spur
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5330-00-676-8226 INTERCHANGEABLE
Seal,plain Encased
5970-00-953-1293 INTERCHANGEABLE
Insulator,standoff
4810-01-130-55294535 INTERCHANGEABLE
Valve Assembly,drain
Howell Laboratories Inc Dba Howell Laboratories Inc
5310-01-631-292536314 INTERCHANGEABLE
Nut,plain,hexagon
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
3631-D-91 PRIMARY Lyn-Tron, Inc. Dba Lyn-Tron Inc (USA)
11-423-4-01 PRIMARY Concord Electronics, Inc. (USA)
4535-D-1 PRIMARY Lerco Div Space-Lok Inc (USA)
4535D Te Connectivity Corporation Dba Microdot Products (USA)
10018660-004 Us Army Aviation and Missile Command (USA)
B-466-D-1 OR 446-D Lta/d-Cemco Inc Dba D-Cemco (USA)
466-D-1 PRIMARY Lta/d-Cemco Inc Dba D-Cemco (USA)
3631-4 Lyn-Tron, Inc. Dba Lyn-Tron Inc (USA)
Related Parts
3020-00-270-2211INTERCHANGEABLE
GEAR,SPUR
290300PC3
5330-00-676-8226INTERCHANGEABLE
SEAL,PLAIN ENCASED
5970-00-953-1293INTERCHANGEABLE
INSULATOR,STANDOFF
4810-01-130-5529INTERCHANGEABLE
VALVE ASSEMBLY,DRAIN
4535
5310-01-631-2925INTERCHANGEABLE
NUT,PLAIN,HEXAGON
36314

Frequently Asked Questions

What is NSN 5940-00-079-8638?

NSN 5940-00-079-8638 is a Terminal,stud, manufactured by Lyn-Tron, Inc. Dba Lyn-Tron Inc, classified under FSC 5940 (No Item Name Available). Status: active.

What are the part numbers for NSN 5940-00-079-8638?

NSN 5940-00-079-8638 has 8 cross-referenced part numbers: 3631-D-91 (Lyn-Tron, Inc. Dba Lyn-Tron Inc), 11-423-4-01 (Concord Electronics, Inc.), 4535-D-1 (Lerco Div Space-Lok Inc), 4535D (Te Connectivity Corporation Dba Microdot Products), 10018660-004 (Us Army Aviation and Missile Command) and 3 more.

What NSN replaces 5940-00-079-8638?

There are 5 known substitutes for 5940-00-079-8638: 3020-00-270-2211, 5330-00-676-8226, 5970-00-953-1293 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3631-D-91?

Key specifications for 3631-D-91: Thru-Hole Diameter: 0.040 INCHES IN; Overall Height: 0.408 INCHES IN; Surface Treatment: SILVER CONDUCTOR ACCOMMODATION SINGLE LAYER; Swage Depth: 0.165 INCHES IN. 18 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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