PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8704-3Ram,jack,second Stage

Columbus Jack Corporation Div Columbus Jack · NSN 4320-01-042-4719 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-01-042-4719 — this item is cataloged by the U.S. Government under National Stock Number 4320-01-042-4719. Primary manufacturer part number: 8704-3.
Features
  • Ram,jack,second Stage — FSC 4320
  • General Characteristics Item Description: MATERIAL 4130/4140 HOT-ROLLED STEEL 4.250 IN. OUTSIDE DIAMETER X 0.500 WALL BY 9.000 IN. LONG,FINISHED DIMENSIONS-8.750 IN. LONG BY 4.223 IN. MINIMUM/4.225 IN. MAXIMUM DIAMETER,SURFACE FINISH-SMOOTH INSIDE AND OUTSIDE SURFACES,HEAT TREAT-140,000 TO 160,000 POUNDS PER SQUARE IN. LBS
  • 3 verified cross-references
  • Primary manufacturer: Columbus Jack Corporation Div Columbus Jack
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Ram,jack,second Stage, cataloged under National Stock Number 4320-01-042-4719, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Columbus Jack Corporation Div Columbus Jack. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-01-042-4719
Primary Part Number8704-3
Item NameRam,jack,second Stage
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerColumbus Jack Corporation Div Columbus Jack
StatusACTIVE
General Characteristics Item DescriptionMATERIAL 4130/4140 HOT-ROLLED STEEL 4.250 IN. OUTSIDE DIAMETER X 0.500 WALL BY 9.000 IN. LONG,FINISHED DIMENSIONS-8.750 IN. LONG BY 4.223 IN. MINIMUM/4.225 IN. MAXIMUM DIAMETER,SURFACE FINISH-SMOOTH INSIDE AND OUTSIDE SURFACES,HEAT TREAT-140,000 TO 160,000 POUNDS PER SQUARE IN. LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-110-3500 INTERCHANGEABLE
Transformer,power
5365-00-216-10238704 INTERCHANGEABLE
Spacer,sleeve
Dialight Corporation
2520-00-364-84981K2673 INTERCHANGEABLE
Yoke,universal Joint,vehicular
Caterpillar Inc Div Caterpillar Defense
2915-00-484-70718704 INTERCHANGEABLE
Arm-Stop Servo---Ap
Triumph Engine Control Systems Llc
5360-00-526-9835 INTERCHANGEABLE
Spring,helical,compression
4510-00-528-0245 INTERCHANGEABLE
Arm,waste Pipe
5950-00-875-6829201810 INTERCHANGEABLE
Transformer,power
North Atlantic Industries, Inc. Dba North Atlantic Industries
4320-01-042-4717 INTERCHANGEABLE
Ram,jack,third Stage
1730-01-042-4720 INTERCHANGEABLE
Extension,screw
4820-01-067-3971A6790-007-132 INTERCHANGEABLE
Stem,fluid Valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
8704 Age Logistics Corporation (USA)
8704-3 PRIMARY Columbus Jack Corporation Div Columbus Jack (USA)
8704-3 Age Logistics Corporation (USA)
Related Parts
5950-00-110-3500INTERCHANGEABLE
TRANSFORMER,POWER
5365-00-216-1023INTERCHANGEABLE
SPACER,SLEEVE
8704
2520-00-364-8498INTERCHANGEABLE
YOKE,UNIVERSAL JOINT,VEHICULAR
1K2673
2915-00-484-7071INTERCHANGEABLE
ARM-STOP SERVO---AP
8704
5360-00-526-9835INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
4510-00-528-0245INTERCHANGEABLE
ARM,WASTE PIPE
5950-00-875-6829INTERCHANGEABLE
TRANSFORMER,POWER
201810
4320-01-042-4717INTERCHANGEABLE
RAM,JACK,THIRD STAGE
1730-01-042-4720INTERCHANGEABLE
EXTENSION,SCREW
4820-01-067-3971INTERCHANGEABLE
STEM,FLUID VALVE
A6790-007-132
4320-01-275-4681INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT,SPRING LOADE
87043
4820-01-296-6985INTERCHANGEABLE
RETAINER,DISK,VALVE
6153-55-5 ITEM 12

Frequently Asked Questions

What is NSN 4320-01-042-4719?

NSN 4320-01-042-4719 is a Ram,jack,second Stage, manufactured by Columbus Jack Corporation Div Columbus Jack, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-01-042-4719?

NSN 4320-01-042-4719 has 3 cross-referenced part numbers: 8704 (Age Logistics Corporation), 8704-3 (Columbus Jack Corporation Div Columbus Jack), 8704-3 (Age Logistics Corporation).

What NSN replaces 4320-01-042-4719?

There are 12 known substitutes for 4320-01-042-4719: 5950-00-110-3500, 5365-00-216-1023, 2520-00-364-8498 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8704-3?

Key specifications for 8704-3: End Item Identification: 35 TON AIRCRAFT AXLE JACK MODEL 8704B; General Characteristics Item Description: MATERIAL 4130/4140 HOT-ROLLED STEEL 4.250 IN. OUTSIDE DIAMETER X 0.500 WALL BY 9.000 IN. LONG,FINISHED DIMENSIONS-8.750 IN. LONG BY 4.223 IN. MINIMUM/4.225 IN. MAXIMUM DIAMETER,SURFACE FINISH-SMOOTH INSIDE AND OUTSIDE SURFACES,HEAT TREAT-140,000 TO 160,000 POUNDS PER SQUARE IN. LBS. 2 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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