PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51721Screw,machine

Mcculloch Corp · NSN 5305-01-070-2042 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-070-2042 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-070-2042. Primary manufacturer part number: 51721.
Features
  • Screw,machine — FSC 5305
  • Thread Quantity Per Inch: 40
  • Head Height: 0.075 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
  • Fastener Length: 0.250 INCHES NOMINAL IN
  • Head Style: ROUND
  • Thread Length: 0.200 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
  • Head Diameter: 0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
  • Nominal Thread Diameter: 0.112 INCHES IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-01-070-2042, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mcculloch Corp. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-070-2042
Primary Part Number51721
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerMcculloch Corp
StatusACTIVE
Thread Quantity Per Inch40
Head Height0.075 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN
Fastener Length0.250 INCHES NOMINAL IN
Head StyleROUND
Thread Length0.200 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
Head Diameter0.193 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
Nominal Thread Diameter0.112 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3110-00-083-128251721 INTERCHANGEABLE
Bearing,roller,cylindrical
Parker Hannifin Corporation Div Hydraulic Systems Division
5977-00-265-290010680 INTERCHANGEABLE
Brush,electrical Contact
Miraj Corp
5330-00-738-2106517-21 INTERCHANGEABLE
Gasket
Fl Industries Inc Pneumotive Div
Cross-Reference Index
Part NumberManufacturer
51721 PRIMARY Mcculloch Corp (USA)
Related Parts
3110-00-083-1282INTERCHANGEABLE
BEARING,ROLLER,CYLINDRICAL
51721
5977-00-265-2900INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
10680
5330-00-738-2106INTERCHANGEABLE
GASKET
517-21

Frequently Asked Questions

What is NSN 5305-01-070-2042?

NSN 5305-01-070-2042 is a Screw,machine, manufactured by Mcculloch Corp, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-070-2042?

NSN 5305-01-070-2042 has 1 cross-referenced part number: 51721 (Mcculloch Corp).

What NSN replaces 5305-01-070-2042?

There are 3 known substitutes for 5305-01-070-2042: 3110-00-083-1282, 5977-00-265-2900, 5330-00-738-2106. Verify interchangeability with system specifications before substitution.

What are the specifications of 51721?

Key specifications for 51721: Thread Quantity Per Inch: 40; Part Name Assigned by Controlling Agency: NAVY SPECIAL PROJECT; Head Height: 0.075 INCHES MINIMUM AND 0.086 INCHES MAXIMUM IN; Fastener Length: 0.250 INCHES NOMINAL IN. 8 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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