PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18998Fixture,aircraft Maintenance

Ritchie Engineering Co Inc · NSN 4920-01-732-4440 · FSC 4920 · No Item Name Available
Verified by PartsTable
NSN 4920-01-732-4440 — this item is cataloged by the U.S. Government under National Stock Number 4920-01-732-4440. Primary manufacturer part number: 18998.
Features
  • Fixture,aircraft Maintenance — FSC 4920
  • Nominal Overall Diameter: 0.25 INCHES IN
  • 2 verified cross-references
  • Primary manufacturer: Ritchie Engineering Co Inc
Applications
  • Maintenance depot operations
  • Field repair and servicing
  • Vehicle maintenance facilities
General Description

The Fixture,aircraft Maintenance, cataloged under National Stock Number 4920-01-732-4440, is classified within Federal Supply Class 4920 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Ritchie Engineering Co Inc. 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4920-01-732-4440
Primary Part Number18998
Item NameFixture,aircraft Maintenance
FSC / FSG4920 / 49 — No Item Name Available
ManufacturerRitchie Engineering Co Inc
StatusACTIVE
Nominal Overall Diameter0.25 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
2995-00-138-0735707795 INTERCHANGEABLE
Ring,nozzle and Manifold Assembl
Hamilton Sundstrand Corporation
4140-01-143-966118998 INTERCHANGEABLE
Impeller,fan,centrifugal
Kurz & Root Generator Company, Llc
5360-01-372-6376707795PS INTERCHANGEABLE
Spring,helical,extension
Seats Inc Div Seats Incorporated
5340-01-418-569918998 INTERCHANGEABLE
Bracket,mounting
Parker-Hannifin Corporation Dba Racor Division Div Racor Division
5306-01-542-134012759-00345 INTERCHANGEABLE
Bolt,machine
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
707795 Baker Distributing Company Llc (USA)
18998 PRIMARY Ritchie Engineering Co Inc (USA)
Related Parts
2995-00-138-0735INTERCHANGEABLE
RING,NOZZLE AND MANIFOLD ASSEMBL
707795
4140-01-143-9661INTERCHANGEABLE
IMPELLER,FAN,CENTRIFUGAL
18998
5360-01-372-6376INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
707795PS
5340-01-418-5699INTERCHANGEABLE
BRACKET,MOUNTING
18998
5306-01-542-1340INTERCHANGEABLE
BOLT,MACHINE
12759-00345

Frequently Asked Questions

What is NSN 4920-01-732-4440?

NSN 4920-01-732-4440 is a Fixture,aircraft Maintenance, manufactured by Ritchie Engineering Co Inc, classified under FSC 4920 (No Item Name Available). Status: active.

What are the part numbers for NSN 4920-01-732-4440?

NSN 4920-01-732-4440 has 2 cross-referenced part numbers: 707795 (Baker Distributing Company Llc), 18998 (Ritchie Engineering Co Inc).

What NSN replaces 4920-01-732-4440?

There are 5 known substitutes for 4920-01-732-4440: 2995-00-138-0735, 4140-01-143-9661, 5360-01-372-6376 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18998?

Key specifications for 18998: Part Name Assigned by Controlling Agency: 1/4 INCH TORQUE CRT ASSEMBLY IN; Nominal Overall Diameter: 0.25 INCHES IN. 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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