PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

K21Connecting Rod,piston

Emglo Products Corp · NSN 4310-01-021-6649 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-01-021-6649 — this item is cataloged by the U.S. Government under National Stock Number 4310-01-021-6649. Primary manufacturer part number: K21.
Features
  • Connecting Rod,piston — FSC 4310
  • Fabrication Method: MACHINED
  • Shaft Connecting End Style: AUTOMOTIVE STANDARD SPLIT BEARING 2 BOLT
  • Material: STEEL
  • 1 verified cross-reference
  • Primary manufacturer: Emglo Products Corp
Applications
  • Applications requiring Steel construction
General Description

The Connecting Rod,piston, cataloged under National Stock Number 4310-01-021-6649, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Emglo Products Corp. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN4310-01-021-6649
Primary Part NumberK21
Item NameConnecting Rod,piston
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerEmglo Products Corp
StatusACTIVE
Fabrication MethodMACHINED
Shaft Connecting End StyleAUTOMOTIVE STANDARD SPLIT BEARING 2 BOLT
MaterialSTEEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3040-00-217-5294K2-1 INTERCHANGEABLE
Hub,body
Roller Bearing Co of America, Inc Div Pic Design
3110-00-616-7554400021 INTERCHANGEABLE
Cup,ball Bearing
Zf Active Safety and Electronics Us Llc Div Trw Commercial Steering Systems
5430-00-922-2406016825-2 INTERCHANGEABLE
Tank,liquid Storage
Sea Cure Technology, Inc
6685-01-045-8510 INTERCHANGEABLE
Thermocouple,contact
5120-01-243-9273K-21 INTERCHANGEABLE
Knife,putty
Ampco Partners, Ltd. Dba Ampco Safety Tools
3460-01-339-7309K-21 INTERCHANGEABLE
Wheel,abrasive
Sioux Tools Inc
Cross-Reference Index
Part NumberManufacturer
K21 PRIMARY Emglo Products Corp (USA)
Related Parts
3040-00-217-5294INTERCHANGEABLE
HUB,BODY
K2-1
3110-00-616-7554INTERCHANGEABLE
CUP,BALL BEARING
400021
5430-00-922-2406INTERCHANGEABLE
TANK,LIQUID STORAGE
016825-2
6685-01-045-8510INTERCHANGEABLE
THERMOCOUPLE,CONTACT
5120-01-243-9273INTERCHANGEABLE
KNIFE,PUTTY
K-21
3460-01-339-7309INTERCHANGEABLE
WHEEL,ABRASIVE
K-21

Frequently Asked Questions

What is NSN 4310-01-021-6649?

NSN 4310-01-021-6649 is a Connecting Rod,piston, manufactured by Emglo Products Corp, classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-01-021-6649?

NSN 4310-01-021-6649 has 1 cross-referenced part number: K21 (Emglo Products Corp).

What NSN replaces 4310-01-021-6649?

There are 6 known substitutes for 4310-01-021-6649: 3040-00-217-5294, 3110-00-616-7554, 5430-00-922-2406 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of K21?

Key specifications for K21: Fabrication Method: MACHINED; Shaft Connecting End Style: AUTOMOTIVE STANDARD SPLIT BEARING 2 BOLT; Material: STEEL. 3 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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