PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NAS1831C4B04Standoff,threaded,spacing

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5340-00-401-5966 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-401-5966 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-401-5966. Primary manufacturer part number: NAS1831C4B04.
Features
  • Standoff,threaded,spacing — FSC 5340
  • Thread Direction: RIGHT-HAND RIGHT INTERNAL
  • Width Across Flats: 0.250 INCHES NOMINAL IN
  • Thread Class: 2B RIGHT INTERNAL
  • Nominal Thread Size: 0.112 INCHES RIGHT INTERNAL IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD)
  • Cross-Sectional Length: 0.250 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 40 RIGHT INTERNAL
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Standoff,threaded,spacing, cataloged under National Stock Number 5340-00-401-5966, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-401-5966
Primary Part NumberNAS1831C4B04
Item NameStandoff,threaded,spacing
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusCANCELLED
Thread DirectionRIGHT-HAND RIGHT INTERNAL
Width Across Flats0.250 INCHES NOMINAL IN
Thread Class2B RIGHT INTERNAL
Nominal Thread Size0.112 INCHES RIGHT INTERNAL IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD)
Cross-Sectional Length0.250 INCHES NOMINAL IN
Thread Quantity Per Inch40 RIGHT INTERNAL
Cross-Sectional ShapeHEXAGON
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Unit of IssueEA
Verified Substitutes 1
5340-01-067-718912H4-06-X40C SUCCESSOR
Standoff,threaded,spacing
Positronic Industries Inc Div Amphenol Military Aerospace Operations
Cross-Reference Index
Part NumberManufacturer
ES3684-01B08A08 Drs Sustainment Systems Inc (USA)
2994953-3 Zf Industrieantriebe Witten Gmbh (DEU)
NAS1831 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
8211SS0440-7 New Haven Mfg Corp Amatom Electronic Hardware Div (USA)
8211-SS-0440-S New Haven Mfg Corp Amatom Electronic Hardware Div (USA)
ES3684-01B08A08 Drs Sustainment Systems, Inc. (USA)
CAPNUTS18-8STAINLESS Federal Screw Products, Inc. (USA)
NAS1831C4B04 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
11437857-7 Us Army Aviation and Missile Command (USA)
4V10380 ITEM 17 Lockheed Martin Corp (USA)
Related Parts
5340-01-067-7189SUCCESSOR
STANDOFF,THREADED,SPACING
12H4-06-X40C

Frequently Asked Questions

What is NSN 5340-00-401-5966?

NSN 5340-00-401-5966 is a Standoff,threaded,spacing, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5340 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5340-00-401-5966?

NSN 5340-00-401-5966 has 10 cross-referenced part numbers: ES3684-01B08A08 (Drs Sustainment Systems Inc), 2994953-3 (Zf Industrieantriebe Witten Gmbh), NAS1831 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), 8211SS0440-7 (New Haven Mfg Corp Amatom Electronic Hardware Div), 8211-SS-0440-S (New Haven Mfg Corp Amatom Electronic Hardware Div) and 5 more.

What NSN replaces 5340-00-401-5966?

There is 1 known substitute for 5340-00-401-5966: 5340-01-067-7189. Verify interchangeability with system specifications before substitution.

What are the specifications of NAS1831C4B04?

Key specifications for NAS1831C4B04: Thread Direction: RIGHT-HAND RIGHT INTERNAL; Width Across Flats: 0.250 INCHES NOMINAL IN; Thread Class: 2B RIGHT INTERNAL; Nominal Thread Size: 0.112 INCHES RIGHT INTERNAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5340-00-401-5966 still in active supply?

NSN 5340-00-401-5966 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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