PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

D4012Coupling,shaft,flexible

Diamond Chain Co Div of Amsted Industries Inc · NSN 3010-00-850-5309 · FSC 3010 · No Item Name Available
Verified by PartsTable
NSN 3010-00-850-5309 — this item is cataloged by the U.S. Government under National Stock Number 3010-00-850-5309. Primary manufacturer part number: D4012.
Features
  • Coupling,shaft,flexible — FSC 3010
  • Outside Diameter: 2.406 INCHES NOMINAL IN
  • Threaded Hole Location: BOTH ENDS: LOCATED ON TOP KEYWAY
  • Securing Method: THREADED HOLE(S) SECOND END
  • Keyway Width: 0.188 INCHES NOMINAL BOTH ENDS IN
  • Bore Shape: STRAIGHT BOTH ENDS
  • Keying Facility Type: KEYWAY BOTH ENDS
  • Furnished Items and Quantity: SETSCREWS 1
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupling,shaft,flexible, cataloged under National Stock Number 3010-00-850-5309, is classified within Federal Supply Class 3010 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Diamond Chain Co Div of Amsted Industries Inc. Government technical data includes 15 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3010-00-850-5309
Primary Part NumberD4012
Item NameCoupling,shaft,flexible
FSC / FSG3010 / 30 — No Item Name Available
ManufacturerDiamond Chain Co Div of Amsted Industries Inc
StatusACTIVE
Outside Diameter2.406 INCHES NOMINAL IN
Threaded Hole LocationBOTH ENDS: LOCATED ON TOP KEYWAY
Securing MethodTHREADED HOLE(S) SECOND END
Keyway Width0.188 INCHES NOMINAL BOTH ENDS IN
Bore ShapeSTRAIGHT BOTH ENDS
Keying Facility TypeKEYWAY BOTH ENDS
Furnished Items and QuantitySETSCREWS 1
Thread Size Designator1/4-20 THD SIZE BOTH ENDS
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY BORE SHAPE,BORE DIA,BORE LENGTH,KEYING FACILITY QTY,KEYING FACILITY TYPE,KEYWAY WIDTH,KEYWAY DEPTH,BORE COUNTERBORE FEATURE
Keyway Depth0.0940 INCHES NOMINAL BOTH ENDS IN
Keying Facility Quantity1 BOTH ENDS
Bore Length2.5310 INCHES NOMINAL BOTH ENDS IN
Design TypeROLLER CHAIN
Threaded Hole Quantity1 BOTH ENDS
Bore Diameter0.7500 INCHES NOMINAL BOTH ENDS IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6685-00-036-5114 INTERCHANGEABLE
Thermometer,self-Indicating,bime
Cross-Reference Index
Part NumberManufacturer
D4012 Diamond Chain Co Div of Amsted Industries Inc (USA)
Related Parts
6685-00-036-5114INTERCHANGEABLE
THERMOMETER,SELF-INDICATING,BIME

Frequently Asked Questions

What is NSN 3010-00-850-5309?

NSN 3010-00-850-5309 is a Coupling,shaft,flexible, manufactured by Diamond Chain Co Div of Amsted Industries Inc, classified under FSC 3010 (No Item Name Available). Status: active.

What are the part numbers for NSN 3010-00-850-5309?

NSN 3010-00-850-5309 has 1 cross-referenced part number: D4012 (Diamond Chain Co Div of Amsted Industries Inc).

What NSN replaces 3010-00-850-5309?

There is 1 known substitute for 3010-00-850-5309: 6685-00-036-5114. Verify interchangeability with system specifications before substitution.

What are the specifications of D4012?

Key specifications for D4012: Outside Diameter: 2.406 INCHES NOMINAL IN; Threaded Hole Location: BOTH ENDS: LOCATED ON TOP KEYWAY; Securing Method: THREADED HOLE(S) SECOND END; Keyway Width: 0.188 INCHES NOMINAL BOTH ENDS IN. 16 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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