PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20000687Screw,machine

Waltham Aircraft Clock Corp · NSN 5305-00-719-8681 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-719-8681 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-719-8681. Primary manufacturer part number: 20000687.
Features
  • Screw,machine — FSC 5305
  • Screw Material: STEEL
  • Nominal Thread Diameter: 1.0 MILLIMETERS MM
  • Thread Series Designator: UNM
  • Fastener Length: 2.10 MILLIMETERS NOMINAL MM
  • Screw Surface Treatment: NICKEL
  • Thread Length: 1.7 MILLIMETERS NOMINAL MM
  • Thread Quantity Per Inch: 140
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Screw,machine, cataloged under National Stock Number 5305-00-719-8681, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Waltham Aircraft Clock Corp. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-00-719-8681
Primary Part Number20000687
Item NameScrew,machine
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerWaltham Aircraft Clock Corp
StatusACTIVE
Screw MaterialSTEEL
Nominal Thread Diameter1.0 MILLIMETERS MM
Thread Series DesignatorUNM
Fastener Length2.10 MILLIMETERS NOMINAL MM
Screw Surface TreatmentNICKEL
Thread Length1.7 MILLIMETERS NOMINAL MM
Thread Quantity Per Inch140
Thread DirectionRIGHT-HAND
Thread Class3A A
Head StyleFLAT CHAMFER
Head Diameter1.47 MILLIMETERS NOMINAL MM
Internal Drive StyleSLOT
Head Height0.9 MILLIMETERS NOMINAL MM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-0676687 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
4730-00-189-3041 INTERCHANGEABLE
Reducer,pipe
5310-00-354-5927 INTERCHANGEABLE
Washer,flat
5120-00-473-74707082084 INTERCHANGEABLE
Inserter,seal
U S Army Tank Automotive Command Amsta-Im-Mm
5325-00-616-596153-480 INTERCHANGEABLE
Grommet,nonmetallic
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
1680-00-631-7344687 INTERCHANGEABLE
Seat,aircraft
Ami Industries, Inc Div Utc Aerospace Systems
3110-00-938-4023E104644PC84 INTERCHANGEABLE
Bearing,roller,needle
Control Flow, Inc. Dba Control Flow Inc
2920-01-038-1329687 INTERCHANGEABLE
Spark Plug
Allied-Signal Inc Autolite Div
6240-01-044-00717646 INTERCHANGEABLE
Lamp,incandescent
Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
5950-01-053-4101 INTERCHANGEABLE
Transformer,radio Frequency
Cross-Reference Index
Part NumberManufacturer
687 Waltham Clock Co Inc (USA)
WCM687 Waltham Clock Co Inc (USA)
20000687 Waltham Clock Co Inc (USA)
20000687 PRIMARY Waltham Aircraft Clock Corp (USA)
Related Parts
3110-00-100-0676INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
687
4730-00-189-3041INTERCHANGEABLE
REDUCER,PIPE
5310-00-354-5927INTERCHANGEABLE
WASHER,FLAT
5120-00-473-7470INTERCHANGEABLE
INSERTER,SEAL
7082084
5325-00-616-5961INTERCHANGEABLE
GROMMET,NONMETALLIC
53-480
1680-00-631-7344INTERCHANGEABLE
SEAT,AIRCRAFT
687
3110-00-938-4023INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
E104644PC84
2920-01-038-1329INTERCHANGEABLE
SPARK PLUG
687
6240-01-044-0071INTERCHANGEABLE
LAMP,INCANDESCENT
7646
5950-01-053-4101INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
5315-01-068-4709INTERCHANGEABLE
PIN,GROOVED,HEADLESS
687
5120-01-310-2768INTERCHANGEABLE
JACK,LEVELING-SUPPORT
687

Frequently Asked Questions

What is NSN 5305-00-719-8681?

NSN 5305-00-719-8681 is a Screw,machine, manufactured by Waltham Aircraft Clock Corp, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-719-8681?

NSN 5305-00-719-8681 has 4 cross-referenced part numbers: 687 (Waltham Clock Co Inc), WCM687 (Waltham Clock Co Inc), 20000687 (Waltham Clock Co Inc), 20000687 (Waltham Aircraft Clock Corp).

What NSN replaces 5305-00-719-8681?

There are 12 known substitutes for 5305-00-719-8681: 3110-00-100-0676, 4730-00-189-3041, 5310-00-354-5927 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20000687?

Key specifications for 20000687: Screw Material: STEEL; Nominal Thread Diameter: 1.0 MILLIMETERS MM; Thread Series Designator: UNM; Fastener Length: 2.10 MILLIMETERS NOMINAL MM. 13 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com