PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS51861-1CScrew,tapping

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5305-01-146-2533 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-146-2533 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-146-2533. Primary manufacturer part number: MS51861-1C.
Features
  • Screw,tapping — FSC 5305
  • Minimum Tensile Strength: 90000 POUNDS PER SQUARE INCH LBS
  • Nonmachine Nominal Thread Diameter: 0.086 INCHES IN
  • Material: STEEL COMP 410 OVERALL
  • Internal Drive Style: CROSS RECESS TYPE 1
  • Head Height: 0.069 INCHES MAXIMUM IN
  • Head Style: ROUND
  • Nonmachine Thread Style: WIDE FLUTE (TYPE H OR BT)
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 410 Overall construction
General Description

The Screw,tapping, cataloged under National Stock Number 5305-01-146-2533, is classified within Federal Supply Class 5305 (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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-146-2533
Primary Part NumberMS51861-1C
Item NameScrew,tapping
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusACTIVE
Minimum Tensile Strength90000 POUNDS PER SQUARE INCH LBS
Nonmachine Nominal Thread Diameter0.086 INCHES IN
MaterialSTEEL COMP 410 OVERALL
Internal Drive StyleCROSS RECESS TYPE 1
Head Height0.069 INCHES MAXIMUM IN
Head StyleROUND
Nonmachine Thread StyleWIDE FLUTE (TYPE H OR BT)
Head Diameter0.146 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN
Fastener Length0.188 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5305-00-052-8241 INTERCHANGEABLE
Screw,tapping
5305-00-058-1082128270 INTERCHANGEABLE
Screw,tapping
Navistar Intl Corp Truck Br Ohio Plant
5305-00-147-3222MS51861-1C INTERCHANGEABLE
Screw,tapping
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-00-432-4205MS51861-49 INTERCHANGEABLE
Screw,tapping
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-00-879-794180060 INTERCHANGEABLE
Screw,tapping
Hillman Group, Inc., the
5305-01-624-3950 INTERCHANGEABLE
Screw,tapping
Cross-Reference Index
Part NumberManufacturer
100A032763 L3 Technologies, Inc. Div L3 Keo (USA)
MS51861-1C PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
FF-S-107 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
NASM51861 National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
MIL-S-6033 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
AN530C2RF3 Zf Industrieantriebe Witten Gmbh (DEU)
AN530C2RF3 Aeronautical Standards Group Dept of Navy and Air Force (USA)
Related Parts
5305-00-052-8241INTERCHANGEABLE
SCREW,TAPPING
5305-00-058-1082INTERCHANGEABLE
SCREW,TAPPING
128270
5305-00-147-3222INTERCHANGEABLE
SCREW,TAPPING
MS51861-1C
5305-00-432-4205INTERCHANGEABLE
SCREW,TAPPING
MS51861-49
5305-00-879-7941INTERCHANGEABLE
SCREW,TAPPING
80060
5305-01-624-3950INTERCHANGEABLE
SCREW,TAPPING

Frequently Asked Questions

What is NSN 5305-01-146-2533?

NSN 5305-01-146-2533 is a Screw,tapping, manufactured by National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-146-2533?

NSN 5305-01-146-2533 has 7 cross-referenced part numbers: 100A032763 (L3 Technologies, Inc. Div L3 Keo), MS51861-1C (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), FF-S-107 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), NASM51861 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), MIL-S-6033 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 2 more.

What NSN replaces 5305-01-146-2533?

There are 6 known substitutes for 5305-01-146-2533: 5305-00-052-8241, 5305-00-058-1082, 5305-00-147-3222 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS51861-1C?

Key specifications for MS51861-1C: Minimum Tensile Strength: 90000 POUNDS PER SQUARE INCH LBS; Nonmachine Nominal Thread Diameter: 0.086 INCHES IN; Material: STEEL COMP 410 OVERALL; Internal Drive Style: CROSS RECESS TYPE 1. 9 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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