PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20-7843Screw,machine

Ontic Engineering & Manufacturing, Inc Dba Ontic Us · NSN 5305-00-718-9719 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-718-9719 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-718-9719. Primary manufacturer part number: 20-7843.
Features
  • Screw,machine — FSC 5305
  • Nominal Thread Diameter: 0.164 INCHES IN
  • Screw Material Document and Classification: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE
  • Fastener Length: 0.625 INCHES NOMINAL IN
  • Internal Drive Style: SLOT
  • Screw Material: STEEL COMP 1010
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
  • Thread Quantity Per Inch: 32
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-00-718-9719, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5305-00-718-9719
Primary Part Number20-7843
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerOntic Engineering & Manufacturing, Inc Dba Ontic Us
StatusCANCELLED
Nominal Thread Diameter0.164 INCHES IN
Screw Material Document and ClassificationQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE
Fastener Length0.625 INCHES NOMINAL IN
Internal Drive StyleSLOT
Screw MaterialSTEEL COMP 1010
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Thread Quantity Per Inch32
Head Height0.106 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN
Head StyleFLAT CHAMFER
Departure From Cited DesignatorAS MODIFIED BY QUALITY CONTROL NUMBER
Head Diameter0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
Thread Class2A A
Thread Length0.625 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Screw Surface TreatmentCADMIUM
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5330-01-190-1828207843 INTERCHANGEABLE
Seal,plain
Brp Us Inc
5310-01-294-94463232 INTERCHANGEABLE
Washer,shouldered
Keystone Electronics Corp
Cross-Reference Index
Part NumberManufacturer
AN500A8-10 Aeronautical Standards Group Dept of Navy and Air Force (USA)
P0S0913457 Ordnance Supply Office (USA)
20-7843 Donallco Inc (USA)
20-7843 PRIMARY Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)
Related Parts
5330-01-190-1828INTERCHANGEABLE
SEAL,PLAIN
207843
5310-01-294-9446INTERCHANGEABLE
WASHER,SHOULDERED
3232

Frequently Asked Questions

What is NSN 5305-00-718-9719?

NSN 5305-00-718-9719 is a Screw,machine, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5305 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5305-00-718-9719?

NSN 5305-00-718-9719 has 4 cross-referenced part numbers: AN500A8-10 (Aeronautical Standards Group Dept of Navy and Air Force), P0S0913457 (Ordnance Supply Office), 20-7843 (Donallco Inc), 20-7843 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).

What NSN replaces 5305-00-718-9719?

There are 2 known substitutes for 5305-00-718-9719: 5330-01-190-1828, 5310-01-294-9446. Verify interchangeability with system specifications before substitution.

What are the specifications of 20-7843?

Key specifications for 20-7843: Nominal Thread Diameter: 0.164 INCHES IN; Screw Material Document and Classification: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE; Fastener Length: 0.625 INCHES NOMINAL IN; Internal Drive Style: SLOT. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5305-00-718-9719 still in active supply?

NSN 5305-00-718-9719 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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