PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SMB618257-2Screw,machine

General Dynamics Mission Systems, Inc. · NSN 5305-00-402-2666 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-402-2666 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-402-2666. Primary manufacturer part number: SMB618257-2.
Features
  • Screw,machine — FSC 5305
  • Thread Direction: RIGHT-HAND
  • Head Height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
  • Head Style: PAN
  • Minimum Tensile Strength: 80000 POUNDS PER SQUARE INCH LBS
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Nondefinitive Spec/std Data: 3 TYPE AND 9C STYLE
  • Screw Surface Treatment: OXIDE
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-00-402-2666, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is General Dynamics Mission Systems, Inc.. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 16 commercial cross-references from 16 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5305-00-402-2666
Primary Part NumberSMB618257-2
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerGeneral Dynamics Mission Systems, Inc.
StatusCANCELLED
Thread DirectionRIGHT-HAND
Head Height0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
Head StylePAN
Minimum Tensile Strength80000 POUNDS PER SQUARE INCH LBS
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Nondefinitive Spec/std Data3 TYPE AND 9C STYLE
Screw Surface TreatmentOXIDE
Screw Surface Treatment Document and ClassificationMIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE
Thread Quantity Per Inch32
Screw MaterialSTEEL CORROSION RESISTING OR STEEL
Screw Material Document and ClassificationQQ-S-763,300 SERIES FED SPEC 1ST MATERIAL RESPONSE OR 66,300 SERIES FED STD 1ST MATERIAL RESPONSE OR COMP 16-18 OR 18-8 ASSN STD 2ND MATERIAL RESPONSE
Nominal Thread Diameter0.138 INCHES IN
Head Diameter0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
Internal Drive StyleCROSS RECESS TYPE 1
Thread Length0.157 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
Thread Class2A A
Fastener Length0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
5305-00-054-6650 INTERCHANGEABLE
Screw,machine
5305-01-505-2420H99-0002-226 INTERCHANGEABLE
Screw,machine
L3harris Technologies, Inc. Dba Harris Corp Div Harris Defense Communications
5305-01-551-4436MS51957-26 INTERCHANGEABLE
Screw,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
Cross-Reference Index
Part NumberManufacturer
SMB618257-2 General Dynamics Mission Systems, Inc. (USA)
05000-00-247 General Dynamics Land Systems Canada Corporation (CAN)
99930704M Elbit Systems C4i and Cyber Ltd Div C4i and Cyber (ISR)
H99-0002-226 Nd Industries Inc Div Nd Industries, Inc. - Midwestern Division (USA)
140300026 Elac Sonar Gmbh (DEU)
5305PL2215094 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MS51957-26 Zf Industrieantriebe Witten Gmbh (DEU)
540176-026 Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc (USA)
MS51957-26B Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
950726-10 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
AH726-10 Airhardware Inc (USA)
P343-0032-000 Allied Products Corp Pheoll Mfg Co Div (USA)
FFS92 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
CAV70-6-4B Recon/optical, Inc. (USA)
M2145026 Aero Vodochody A.s. (CZE)
10125275 Nimikkeistokeskus Ncb Finland (FIN)
Related Parts
5305-00-054-6650INTERCHANGEABLE
SCREW,MACHINE
5305-01-505-2420INTERCHANGEABLE
SCREW,MACHINE
H99-0002-226
5305-01-551-4436INTERCHANGEABLE
SCREW,MACHINE
MS51957-26

Frequently Asked Questions

What is NSN 5305-00-402-2666?

NSN 5305-00-402-2666 is a Screw,machine, manufactured by General Dynamics Mission Systems, Inc., classified under FSC 5305 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5305-00-402-2666?

NSN 5305-00-402-2666 has 16 cross-referenced part numbers: SMB618257-2 (General Dynamics Mission Systems, Inc.), 05000-00-247 (General Dynamics Land Systems Canada Corporation), 99930704M (Elbit Systems C4i and Cyber Ltd Div C4i and Cyber), H99-0002-226 (Nd Industries Inc Div Nd Industries, Inc. - Midwestern Division), 140300026 (Elac Sonar Gmbh) and 11 more.

What NSN replaces 5305-00-402-2666?

There are 3 known substitutes for 5305-00-402-2666: 5305-00-054-6650, 5305-01-505-2420, 5305-01-551-4436. Verify interchangeability with system specifications before substitution.

What are the specifications of SMB618257-2?

Key specifications for SMB618257-2: Thread Direction: RIGHT-HAND; Head Height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN; Head Style: PAN; Minimum Tensile Strength: 80000 POUNDS PER SQUARE INCH LBS. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-00-402-2666 still in active supply?

NSN 5305-00-402-2666 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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