PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS51981-46Setscrew

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use · NSN 5305-00-715-1215 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-715-1215 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-715-1215. Primary manufacturer part number: MS51981-46.
Features
  • Setscrew — FSC 5305
  • Thread Quantity Per Inch: 20
  • Material Document and Classification: AISI ASSN STD ALL MATERIAL RESPONSES OVERALL
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
  • Surface Treatment: CADMIUM AND CHROMATE OVERALL
  • Material: STEEL COMP 4032 OR STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
  • Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
Applications
  • Applications requiring Steel Comp 4032 or Steel Comp 4037 or Steel Comp 4137 or Steel Comp 4140 or Steel Comp 8630 or Steel Comp 8740 Overall construction
General Description

The Setscrew, cataloged under National Stock Number 5305-00-715-1215, 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 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5305-00-715-1215
Primary Part NumberMS51981-46
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
Thread Quantity Per Inch20
Material Document and ClassificationAISI ASSN STD ALL MATERIAL RESPONSES OVERALL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Hardness Rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
Surface TreatmentCADMIUM AND CHROMATE OVERALL
MaterialSTEEL COMP 4032 OR STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
Head StyleHEADLESS (SETSCREW)
Thread Class3A A
Thread Length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Width Across Flats0.125 INCHES NOMINAL IN
Nominal Thread Diameter0.250 INCHES IN
Point StyleOVAL
Fastener Length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
Internal Drive StyleHEXAGON
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
4320-00-076-7787052715-00 INTERCHANGEABLE
Sleeve
Curtiss-Wright Electro-Mechanical Corporation Div Epd
5905-00-174-150815458 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
3455-00-232-409463461 INTERCHANGEABLE
Reamer,machine
Jcorps Dba Lashundra Craig
5306-00-828-976053A68A116 INTERCHANGEABLE
Bolt,externally Relieved Body
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5305-01-133-0799AES38C250250EJ1A11 INTERCHANGEABLE
Screw
The American Society of Mechanical Engineers
5930-01-388-0852016640404-2-016 INTERCHANGEABLE
Switch,pressure
Windham Lifts Inc
6515-01-492-111815458L INTERCHANGEABLE
Staple Unit,surgical
Tyco United States Surgical Corp
6545-01-581-8551UA T662 INTERCHANGEABLE
Kit,tent Temper-Med
Department of the Army U S Army Medical Material Agency Mcmr-Mmo-Sa
Cross-Reference Index
Part NumberManufacturer
MS51981-46 PRIMARY National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use (USA)
MS51049-46 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
589570 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
FFS200 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
MS51981-46 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
589570 General Motors Corp (USA)
15458 Zf Industrieantriebe Witten Gmbh (DEU)
Related Parts
4320-00-076-7787INTERCHANGEABLE
SLEEVE
052715-00
5905-00-174-1508INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
15458
3455-00-232-4094INTERCHANGEABLE
REAMER,MACHINE
63461
5306-00-828-9760INTERCHANGEABLE
BOLT,EXTERNALLY RELIEVED BODY
53A68A116
5305-01-133-0799INTERCHANGEABLE
SCREW
AES38C250250EJ1A11
5930-01-388-0852INTERCHANGEABLE
SWITCH,PRESSURE
016640404-2-016
6515-01-492-1118INTERCHANGEABLE
STAPLE UNIT,SURGICAL
15458L
6545-01-581-8551INTERCHANGEABLE
KIT,TENT TEMPER-MED
UA T662

Frequently Asked Questions

What is NSN 5305-00-715-1215?

NSN 5305-00-715-1215 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 5305-00-715-1215?

NSN 5305-00-715-1215 has 7 cross-referenced part numbers: MS51981-46 (National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use), MS51049-46 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 589570 (U S Army Tank Automotive Command Amsta-Im-Mm), FFS200 (Federal Specifications Promulgated by General Services Administration Washington DC), MS51981-46 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M) and 2 more.

What NSN replaces 5305-00-715-1215?

There are 8 known substitutes for 5305-00-715-1215: 4320-00-076-7787, 5905-00-174-1508, 3455-00-232-4094 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS51981-46?

Key specifications for MS51981-46: Thread Quantity Per Inch: 20; Material Document and Classification: AISI ASSN STD ALL MATERIAL RESPONSES OVERALL; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC); Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-00-715-1215 still in active supply?

NSN 5305-00-715-1215 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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