PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

NASM51861-39CScrew,tapping

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5305-00-133-1985 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-133-1985 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-133-1985. Primary manufacturer part number: NASM51861-39C.
Features
  • Screw,tapping — FSC 5305
  • Fastener Length: 0.953 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
  • Nonmachine Thread Style: DOG TYPE (TYPE B OR C)
  • Surface Treatment: PASSIVATE OVERALL
  • Internal Drive Style: CROSS RECESS TYPE 1
  • Head Style: PAN
  • Material: STEEL COMP 410 OR STEEL COMP 420 OVERALL
  • Departure From Cited Designator: AS MODIFIED BY MAT
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 410 or Steel Comp 420 Overall construction
General Description

The Screw,tapping, cataloged under National Stock Number 5305-00-133-1985, 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 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-133-1985
Primary Part NumberNASM51861-39C
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
Fastener Length0.953 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
Nonmachine Thread StyleDOG TYPE (TYPE B OR C)
Surface TreatmentPASSIVATE OVERALL
Internal Drive StyleCROSS RECESS TYPE 1
Head StylePAN
MaterialSTEEL COMP 410 OR STEEL COMP 420 OVERALL
Departure From Cited DesignatorAS MODIFIED BY MAT
Material Document and Classification66 FED STD ALL MATERIAL RESPONSES OVERALL
Nondefinitive Spec/std DataB TYPE
Head Height0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
Nonmachine Nominal Thread Diameter0.164 INCHES IN
Head Diameter0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-014-3189 INTERCHANGEABLE
Screw,tapping
5305-00-017-2046 INTERCHANGEABLE
Screw,tapping
5305-00-081-6794161818 INTERCHANGEABLE
Screw,tapping
U S Army Tank Automotive Command Amsta-Im-Mm
5305-00-145-8368 INTERCHANGEABLE
Screw,tapping
5305-00-253-5616MS21318-22 INTERCHANGEABLE
Screw,drive
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-00-253-5630MS21318-54 INTERCHANGEABLE
Screw,drive
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-00-281-5993MD-2-421 INTERCHANGEABLE
Screw,tapping
Army, United States Department of the Dba Rock Island Arsenal Jmtc
5305-00-465-662689096-16J INTERCHANGEABLE
Screw Tapping
Trico Products Corporation
5305-00-476-7554NASM51861-72C INTERCHANGEABLE
Screw,tapping
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5305-00-638-1761 INTERCHANGEABLE
Screw,drive
Cross-Reference Index
Part NumberManufacturer
FFS107 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
NASM51861-39C PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
FF-S-107C Federal Specifications Promulgated by General Services Administration Washington DC (USA)
MS24622-34 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5305-00-014-3189INTERCHANGEABLE
SCREW,TAPPING
5305-00-017-2046INTERCHANGEABLE
SCREW,TAPPING
5305-00-081-6794INTERCHANGEABLE
SCREW,TAPPING
161818
5305-00-145-8368INTERCHANGEABLE
SCREW,TAPPING
5305-00-253-5616INTERCHANGEABLE
SCREW,DRIVE
MS21318-22
5305-00-253-5630INTERCHANGEABLE
SCREW,DRIVE
MS21318-54
5305-00-281-5993INTERCHANGEABLE
SCREW,TAPPING
MD-2-421
5305-00-465-6626INTERCHANGEABLE
SCREW TAPPING
89096-16J
5305-00-476-7554INTERCHANGEABLE
SCREW,TAPPING
NASM51861-72C
5305-00-638-1761INTERCHANGEABLE
SCREW,DRIVE
5305-00-754-4355INTERCHANGEABLE
SCREW,TAPPING
127851
5305-00-883-0635INTERCHANGEABLE
SCREW,TAPPING

Frequently Asked Questions

What is NSN 5305-00-133-1985?

NSN 5305-00-133-1985 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 5305-00-133-1985?

NSN 5305-00-133-1985 has 4 cross-referenced part numbers: FFS107 (Federal Specifications Promulgated by General Services Administration Washington DC), NASM51861-39C (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), FF-S-107C (Federal Specifications Promulgated by General Services Administration Washington DC), MS24622-34 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5305-00-133-1985?

There are 12 known substitutes for 5305-00-133-1985: 5305-00-014-3189, 5305-00-017-2046, 5305-00-081-6794 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of NASM51861-39C?

Key specifications for NASM51861-39C: Fastener Length: 0.953 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN; Nonmachine Thread Style: DOG TYPE (TYPE B OR C); Surface Treatment: PASSIVATE OVERALL; Internal Drive Style: CROSS RECESS TYPE 1. 12 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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