PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS51021-9Setscrew

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5305-00-800-7261 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-800-7261 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-800-7261. Primary manufacturer part number: MS51021-9.
Features
  • Setscrew — FSC 5305
  • Internal Drive Style: HEXAGON
  • Thread Class: 3A A
  • Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
  • Material Document and Classification: QQ-S-763 FED SPEC ALL MATERIAL RESPONSES OVERALL
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Material: STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OVERALL
  • Surface Treatment: PASSIVATE OVERALL
Applications
  • Applications requiring Steel Comp 302 or Steel Comp 304 or Steel Comp 305 Overall construction
General Description

The Setscrew, cataloged under National Stock Number 5305-00-800-7261, 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 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 37 commercial cross-references from 30 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5305-00-800-7261
Primary Part NumberMS51021-9
Item NameSetscrew
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNational Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
StatusCANCELLED
Internal Drive StyleHEXAGON
Thread Class3A A
Surface Treatment Document and ClassificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Material Document and ClassificationQQ-S-763 FED SPEC ALL MATERIAL RESPONSES OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
MaterialSTEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OVERALL
Surface TreatmentPASSIVATE OVERALL
Thread DirectionRIGHT-HAND
Head StyleHEADLESS (SETSCREW)
Nominal Thread Diameter0.112 INCHES IN
Thread Quantity Per Inch40
Width Across Flats0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN
Point StyleCUP
Fastener Length0.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
5310-00-021-85651249S INTERCHANGEABLE
Nut,plain,hexagon
Dorsey Trailers Inc
5305-00-045-1684 INTERCHANGEABLE
Setscrew
5935-00-080-5568Y116A INTERCHANGEABLE
Socket,plug-in Electronic Compon
Communications & Power Industries Llc Dba Cpi Div Microwave Power Products Division - Eimac Operations
5305-00-638-1832AN565DC4H2 INTERCHANGEABLE
Setscrew
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5360-00-734-67327346732 INTERCHANGEABLE
Spring,helical,compression
U S Army Tank Automotive Command Amsta-Im-Mm
6520-01-136-584801-0137 INTERCHANGEABLE
Retractor,oral
Biomet Microfixation, Llc Div Biomet Microfixation
5305-01-175-6935 INTERCHANGEABLE
Setscrew
6105-01-220-051401-0137 INTERCHANGEABLE
Motor,alternating Current
Ward Leonard Ct Llc
5120-01-308-2803Y116 INTERCHANGEABLE
Die,crimping Tool
Daniels Manufacturing Corporation
Cross-Reference Index
Part NumberManufacturer
5305008007261 E.c.a Etablissement Centrald'approvisionnement Des Forces Armee
317166 Lucas France Sa Div Aerospace France (FRA)
5581476 General Motors Llc Dba General Motors Llc (USA)
AN565DC4H2 Northrop Grumman Systems Corporation (USA)
10125496 Nimikkeistokeskus Ncb Finland (FIN)
N634P902 Bae Systems Information and Electronic Systems Integration I (USA)
MS51022-9 Zf Industrieantriebe Witten Gmbh (DEU)
FFS103 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Y11+6 Roller Bearing Co of America, Inc Div Pic Design (USA)
010137 Diehl Defence Gmbh & Co. Kg (DEU)
003-07941-009 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA)
70073-0802 Sypris Electronics, Llc (USA)
5305PL1336594 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MS51021-9 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
592816 Army Weapons Command Attn Amswe-Ree-S (USA)
43S90591-210 Naval Ordnance Standards (USA)
0455-128 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
P2497-235 Zf Industrieantriebe Witten Gmbh (DEU)
RT-VA 207 039-2 Elbit Systems of America - Night Vision Llc (USA)
AN565DC4H2 Zf Industrieantriebe Witten Gmbh (DEU)
Related Parts
5310-00-021-8565INTERCHANGEABLE
NUT,PLAIN,HEXAGON
1249S
5305-00-045-1684INTERCHANGEABLE
SETSCREW
5935-00-080-5568INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
Y116A
5305-00-638-1832INTERCHANGEABLE
SETSCREW
AN565DC4H2
5360-00-734-6732INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
7346732
6520-01-136-5848INTERCHANGEABLE
RETRACTOR,ORAL
01-0137
5305-01-175-6935INTERCHANGEABLE
SETSCREW
6105-01-220-0514INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
01-0137
5120-01-308-2803INTERCHANGEABLE
DIE,CRIMPING TOOL
Y116

Frequently Asked Questions

What is NSN 5305-00-800-7261?

NSN 5305-00-800-7261 is a Setscrew, 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: cancelled.

What are the part numbers for NSN 5305-00-800-7261?

NSN 5305-00-800-7261 has 37 cross-referenced part numbers: 5305008007261 (E.c.a Etablissement Centrald'approvisionnement Des Forces Armee), 317166 (Lucas France Sa Div Aerospace France), 5581476 (General Motors Llc Dba General Motors Llc), AN565DC4H2 (Northrop Grumman Systems Corporation), 10125496 (Nimikkeistokeskus Ncb Finland) and 32 more.

What NSN replaces 5305-00-800-7261?

There are 9 known substitutes for 5305-00-800-7261: 5310-00-021-8565, 5305-00-045-1684, 5935-00-080-5568 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS51021-9?

Key specifications for MS51021-9: Internal Drive Style: HEXAGON; Thread Class: 3A A; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: QQ-S-763 FED SPEC ALL MATERIAL RESPONSES OVERALL. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-00-800-7261 still in active supply?

NSN 5305-00-800-7261 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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