FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
General Description
The Nut,coupling,flexible Casing, cataloged under National Stock Number 3040-00-703-1598, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3040-00-703-1598
Item Name
Nut,coupling,flexible Casing
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Status
ACTIVE
Thread Length
0.125 INCHES NOMINAL IN
Seat End Inside Diameter
0.375 INCHES NOMINAL IN
Thread Direction
RIGHT-HAND
Thread Size
5/8 IN.-32 IN
Screw Thread Series Designator
UN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5950-00-810-87163-60916-1POSSIBLE MATCH
TRANSFORMER,POWER AUTOTRANSFORME
Possible match (shared part number)Northrop Grumman Systems Corporation
4920-00-838-6174POSSIBLE MATCH
COMPONENT MODULE
Possible match (shared part number)
5930-00-972-8452304JK08APOSSIBLE MATCH
SWITCH,ROTARY
Possible match (shared part number)Electro Switch Corp. Dba Electro Switch Corp
1680-01-692-50935117-1POSSIBLE MATCH
HEATING ELEMENT,ELECTRICAL,NONIM
Possible match (shared part number)Birk Manufacturing, Inc. Dba Birk Manufacturing Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
SCB69689
3/2Design control — primary reference
U.S. Government activity
51171
5/9Secondary reference
U.S. Government activity
Related Parts
5950-00-810-8716POSSIBLE MATCH
TRANSFORMER,POWER AUTOTRANSFORME
3-60916-1
4920-00-838-6174POSSIBLE MATCH
COMPONENT MODULE
5930-00-972-8452POSSIBLE MATCH
SWITCH,ROTARY
304JK08A
1680-01-692-5093POSSIBLE MATCH
HEATING ELEMENT,ELECTRICAL,NONIM
5117-1
Frequently Asked Questions
What is NSN 3040-00-703-1598?
NSN 3040-00-703-1598 is a Nut,coupling,flexible Casing, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What NSN replaces 3040-00-703-1598?
4 possible matches (shared part number, not a government interchangeability claim): 5950-00-810-8716, 4920-00-838-6174, 5930-00-972-8452. Verify interchangeability with system specifications before substitution.
What are the specifications of 3040-00-703-1598?
Key specifications for 3040-00-703-1598: Thread Length: 0.125 INCHES NOMINAL IN; Overall Length: 0.250 INCHES NOMINAL IN; Seat End Inside Diameter: 0.375 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND. 5 specifications are documented in the U.S. Government catalog.
Is NSN 3040-00-703-1598 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.