PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18691Cap,socket,piston Pump

Eaton Aerospace, Llc Dba Jackson South · NSN 4320-00-168-0315 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-168-0315 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-168-0315. Primary manufacturer part number: 18691.
Features
  • Cap,socket,piston Pump — FSC 4320
  • General Characteristics Item Description: CONSISTS OF BRASSE BODY,1.470 IN. LG,1.311 IN. OD,W/0.875-20 UNEF 2B RH THDS,0.562 IN. THD LG,AND STEEL INSERT,0.808 IN. MINIMUM OD,@1.125 IN. MAXIMUM OD,W/0.875-20 UNEF 2A THD,0.280 IN. THD LG,AND 2 SHIMS 0.360 IN. W A
  • 2 verified cross-references
  • Primary manufacturer: Eaton Aerospace, Llc Dba Jackson South
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Cap,socket,piston Pump, cataloged under National Stock Number 4320-00-168-0315, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4320-00-168-0315
Primary Part Number18691
Item NameCap,socket,piston Pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerEaton Aerospace, Llc Dba Jackson South
StatusACTIVE
General Characteristics Item DescriptionCONSISTS OF BRASSE BODY,1.470 IN. LG,1.311 IN. OD,W/0.875-20 UNEF 2B RH THDS,0.562 IN. THD LG,AND STEEL INSERT,0.808 IN. MINIMUM OD,@1.125 IN. MAXIMUM OD,W/0.875-20 UNEF 2A THD,0.280 IN. THD LG,AND 2 SHIMS 0.360 IN. W A
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
2990-00-566-892418691 INTERCHANGEABLE
Starter,engine,hand
R.h. Industries, Inc.
5950-00-891-9165SM-D-414452 INTERCHANGEABLE
Transformer,radio Frequency
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5310-00-913-5965 INTERCHANGEABLE
Washer,spring Tension
5910-00-946-6728 INTERCHANGEABLE
Capacitor,variable,glass Dielect
3930-01-006-063618691 INTERCHANGEABLE
Frame Assembly
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
7520-01-416-4322 INTERCHANGEABLE
Hanger,file
6150-01-546-990618691 INTERCHANGEABLE
Lead,storage Battery
Generac Mobile Products, Llc
5305-01-624-120918691 INTERCHANGEABLE
Screw,lock Plate
Teledyne Flir Unmanned Ground Systems, Inc
Cross-Reference Index
Part NumberManufacturer
18691 PRIMARY Eaton Aerospace, Llc Dba Jackson South (USA)
18691 Reidville Hydraulics & Mfg Inc (USA)
Related Parts
2990-00-566-8924INTERCHANGEABLE
STARTER,ENGINE,HAND
18691
5950-00-891-9165INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
SM-D-414452
5310-00-913-5965INTERCHANGEABLE
WASHER,SPRING TENSION
5910-00-946-6728INTERCHANGEABLE
CAPACITOR,VARIABLE,GLASS DIELECT
3930-01-006-0636INTERCHANGEABLE
FRAME ASSEMBLY
18691
7520-01-416-4322INTERCHANGEABLE
HANGER,FILE
6150-01-546-9906INTERCHANGEABLE
LEAD,STORAGE BATTERY
18691
5305-01-624-1209INTERCHANGEABLE
SCREW,LOCK PLATE
18691

Frequently Asked Questions

What is NSN 4320-00-168-0315?

NSN 4320-00-168-0315 is a Cap,socket,piston Pump, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-168-0315?

NSN 4320-00-168-0315 has 2 cross-referenced part numbers: 18691 (Eaton Aerospace, Llc Dba Jackson South), 18691 (Reidville Hydraulics & Mfg Inc).

What NSN replaces 4320-00-168-0315?

There are 8 known substitutes for 4320-00-168-0315: 2990-00-566-8924, 5950-00-891-9165, 5310-00-913-5965 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18691?

Key specifications for 18691: General Characteristics Item Description: CONSISTS OF BRASSE BODY,1.470 IN. LG,1.311 IN. OD,W/0.875-20 UNEF 2B RH THDS,0.562 IN. THD LG,AND STEEL INSERT,0.808 IN. MINIMUM OD,@1.125 IN. MAXIMUM OD,W/0.875-20 UNEF 2A THD,0.280 IN. THD LG,AND 2 SHIMS 0.360 IN. W A. 1 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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