PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

71998Connecting Link,rigid

L3harris Technologies, Inc Div Space & Airborne Systems · NSN 3040-00-138-8613 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-00-138-8613 — this item is cataloged by the U.S. Government under National Stock Number 3040-00-138-8613. Primary manufacturer part number: 71998.
Features
  • Connecting Link,rigid — FSC 3040
  • Body Diameter: 0.875 INCHES NOMINAL IN
  • Surface Treatment: PAINT
  • End Attachment Hole Diameter: 0.625 INCHES NOMINAL FIRST END IN
  • Material: STEEL
  • Body Construction: TUBULAR
  • End Attachment Width: 0.969 INCHES NOMINAL SECOND END IN
  • End Attachment Hole Diameter: 0.875 INCHES NOMINAL SECOND END IN
Applications
  • Applications requiring Steel construction
General Description

The Connecting Link,rigid, cataloged under National Stock Number 3040-00-138-8613, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is L3harris Technologies, Inc Div Space & Airborne Systems. Government technical data includes 11 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
NSN3040-00-138-8613
Primary Part Number71998
Item NameConnecting Link,rigid
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerL3harris Technologies, Inc Div Space & Airborne Systems
StatusACTIVE
Body Diameter0.875 INCHES NOMINAL IN
Surface TreatmentPAINT
End Attachment Hole Diameter0.625 INCHES NOMINAL FIRST END IN
MaterialSTEEL
Body ConstructionTUBULAR
End Attachment Width0.969 INCHES NOMINAL SECOND END IN
End Attachment Hole Diameter0.875 INCHES NOMINAL SECOND END IN
End Attachment Length3.875 INCHES NOMINAL SECOND END IN
End Attachment Length3.750 INCHES NOMINAL FIRST END IN
Link StyleTUBULAR SHANK
End Attachment Width0.938 INCHES NOMINAL FIRST END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5815-00-126-864171998 INTERCHANGEABLE
Collar,locking
Telemechanics Inc
1650-00-306-295971998 INTERCHANGEABLE
Adapter,hydraulic M
Northrop Grumman Systems Corporation
5950-01-069-9395 INTERCHANGEABLE
Coil,radio Frequency
4820-01-221-21216608 INTERCHANGEABLE
Stem,fluid Valve
Lawler Manufacturing Company, Inc.
6150-01-288-484310-4472 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Kidde Technologies, Inc Div Kidde Aerospace and Defense
4820-01-478-36264040-201 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
71998 PRIMARY L3harris Technologies, Inc Div Space & Airborne Systems (USA)
Related Parts
5815-00-126-8641INTERCHANGEABLE
COLLAR,LOCKING
71998
1650-00-306-2959INTERCHANGEABLE
ADAPTER,HYDRAULIC M
71998
5950-01-069-9395INTERCHANGEABLE
COIL,RADIO FREQUENCY
4820-01-221-2121INTERCHANGEABLE
STEM,FLUID VALVE
6608
6150-01-288-4843INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
10-4472
4820-01-478-3626INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
4040-201

Frequently Asked Questions

What is NSN 3040-00-138-8613?

NSN 3040-00-138-8613 is a Connecting Link,rigid, manufactured by L3harris Technologies, Inc Div Space & Airborne Systems, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-00-138-8613?

NSN 3040-00-138-8613 has 1 cross-referenced part number: 71998 (L3harris Technologies, Inc Div Space & Airborne Systems).

What NSN replaces 3040-00-138-8613?

There are 6 known substitutes for 3040-00-138-8613: 5815-00-126-8641, 1650-00-306-2959, 5950-01-069-9395 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 71998?

Key specifications for 71998: Special Features: EFFECTIVE LENGTH: 14.875 TO 16.875; THREAD LINK INFO: LEFT AND RIGHT HAND, LENGTH 1.625, 5/8-18 NF, END ATTACHMENT INFO: MATERIAL STEEL 1ST END, STAINLESS STEEL 2ND END, SURFACE TREATMENT CADMIUM PLATED 1ST END, PASSIVATE 2ND END, CONNECTING BEARING LOCATION BOTH ENDS, LOCKNUT INCLUDED, PAINT OLIVE DRAB; Body Diameter: 0.875 INCHES NOMINAL IN; Surface Treatment: PAINT; End Attachment Hole Diameter: 0.625 INCHES NOMINAL FIRST END IN. 13 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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