PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

751-6402992-2Collar,gagging

Naval Sea Systems Command · NSN 3040-01-493-3818 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-01-493-3818 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-493-3818. Primary manufacturer part number: 751-6402992-2.
Features
  • Collar,gagging — FSC 3040
  • Material: STEEL
  • Surface Treatment: OXIDE
  • General Characteristics Item Description: INTERNAL INVOLUTE SPLINE DATA: 52 TOOTH SPLINE, ACTUAL NO. OF TEETH 35;SPLINE PITCH 12/24;PRESSURE ANGLE 30 DEG;BASE DIA 3.752777 REF;PITCH DIA 4.333333 REF;MAJOR DIA 4.450 MAX;FORM DIA 4.426;MINOR DIA 4.255/4.250;CIRCULAR SPACE WIDTH MIN 0.1309-MAX 0.1348
  • Overall Diameter: 7.962 INCHES NOMINAL IN
  • 5 verified cross-references
  • Primary manufacturer: Naval Sea Systems Command
Applications
  • Applications requiring Steel construction
General Description

The Collar,gagging, cataloged under National Stock Number 3040-01-493-3818, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3040-01-493-3818
Primary Part Number751-6402992-2
Item NameCollar,gagging
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
MaterialSTEEL
Surface TreatmentOXIDE
General Characteristics Item DescriptionINTERNAL INVOLUTE SPLINE DATA: 52 TOOTH SPLINE, ACTUAL NO. OF TEETH 35;SPLINE PITCH 12/24;PRESSURE ANGLE 30 DEG;BASE DIA 3.752777 REF;PITCH DIA 4.333333 REF;MAJOR DIA 4.450 MAX;FORM DIA 4.426;MINOR DIA 4.255/4.250;CIRCULAR SPACE WIDTH MIN 0.1309-MAX 0.1348
Overall Diameter7.962 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4030-01-506-886833212 INTERCHANGEABLE
Swivel and Link Assembly
Mjt Holdings Llc
3040-01-514-3540H841-0310-40 INTERCHANGEABLE
Adjusting Device,belt-Chain Tens
Electric Boat Corporation Div General Dynamics Electric Boat
Cross-Reference Index
Part NumberManufacturer
6402992 Naval Sea Systems Command (USA)
751-6402991-ITEM 1 Naval Sea Systems Command (USA)
211097028 Naval Sea Systems Command (USA)
751-6402991 ITE Naval Sea Systems Command (USA)
751-6402992-2 PRIMARY Naval Sea Systems Command (USA)
Related Parts
4030-01-506-8868INTERCHANGEABLE
SWIVEL AND LINK ASSEMBLY
33212
3040-01-514-3540INTERCHANGEABLE
ADJUSTING DEVICE,BELT-CHAIN TENS
H841-0310-40

Frequently Asked Questions

What is NSN 3040-01-493-3818?

NSN 3040-01-493-3818 is a Collar,gagging, manufactured by Naval Sea Systems Command, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-01-493-3818?

NSN 3040-01-493-3818 has 5 cross-referenced part numbers: 6402992 (Naval Sea Systems Command), 751-6402991-ITEM 1 (Naval Sea Systems Command), 211097028 (Naval Sea Systems Command), 751-6402991 ITE (Naval Sea Systems Command), 751-6402992-2 (Naval Sea Systems Command).

What NSN replaces 3040-01-493-3818?

There are 2 known substitutes for 3040-01-493-3818: 4030-01-506-8868, 3040-01-514-3540. Verify interchangeability with system specifications before substitution.

What are the specifications of 751-6402992-2?

Key specifications for 751-6402992-2: Material: STEEL; Surface Treatment: OXIDE; Overall Height: 3.000 INCHES NOMINAL IN; Special Features: MATERIAL IS CRMOSTL, MIL-S-5626-COND-E-4;C-SHAPED COLLAR;SURFACE TREAT WITH BLACK OXIDE PER MIL-C-13924C, CLASS 1;NHA 3040-01-493-3483. 7 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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