PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1681Washer,flat

Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic · NSN 5310-01-117-5063 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-117-5063 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-117-5063. Primary manufacturer part number: 1681.
Features
  • Washer,flat — FSC 5310
  • Thickness: 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
  • Material: STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
  • Material Document and Classification: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
  • Center Hole Shape Style: ROUND
  • Peripheral Shape Style: ROUND
  • Hole Diameter: 0.386 INCHES MINIMUM AND 0.396 INCHES MAXIMUM IN
  • Overall Diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1010 or Steel Comp 1012 or Steel Comp 1015 or Steel Comp 1016 or Steel Comp 1017 or Steel Comp 1018 or Steel Comp 1019 or Steel Comp 1020 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-117-5063, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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
NSN5310-01-117-5063
Primary Part Number1681
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTwin Disc, Incorporated Dba Twin Disc Mid-Atlantic
StatusACTIVE
Thickness0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN
MaterialSTEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
Material Document and ClassificationSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
Center Hole Shape StyleROUND
Peripheral Shape StyleROUND
Hole Diameter0.386 INCHES MINIMUM AND 0.396 INCHES MAXIMUM IN
Overall Diameter0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
Hardness Rating88.0 ROCKWELL SUPERFICIAL 15-N MINIMUM AND 92.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM
Cross-Sectional Shape StyleRECTANGULAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6610-00-128-77621681 INTERCHANGEABLE
Plate Assy,roll,ind
Mission Systems Davenport Inc.
5905-00-192-3497 INTERCHANGEABLE
Resistor,fixed,film
6240-00-255-01633024A8737 INTERCHANGEABLE
Lamp,incandescent
Middleby Marshall Inc Toastmaster Cooking and Warming Equipment Div
6210-00-299-6386168-1 INTERCHANGEABLE
Light,panel
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
2920-00-401-428216-81 INTERCHANGEABLE
Cable
Motorola Automotive Electronics
3020-00-541-68331681 INTERCHANGEABLE
Gear,spur
L3harris Technologies, Inc. Div Space and Airborne Systems
5950-00-681-72701681 INTERCHANGEABLE
Transformer,power
Comspace Corp Munston Electronics Div
5910-00-891-23900170-0002 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
Keysight Technologies Inc
5815-00-976-1239 INTERCHANGEABLE
Arm
4820-01-154-1195 INTERCHANGEABLE
Control Valve,gear
Cross-Reference Index
Part NumberManufacturer
1TD674 Oshkosh Corp (USA)
1681 PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
1TD674 PRIMARY Oshkosh Defense Llc (USA)
Related Parts
6610-00-128-7762INTERCHANGEABLE
PLATE ASSY,ROLL,IND
1681
5905-00-192-3497INTERCHANGEABLE
RESISTOR,FIXED,FILM
6240-00-255-0163INTERCHANGEABLE
LAMP,INCANDESCENT
3024A8737
6210-00-299-6386INTERCHANGEABLE
LIGHT,PANEL
168-1
2920-00-401-4282INTERCHANGEABLE
CABLE
16-81
3020-00-541-6833INTERCHANGEABLE
GEAR,SPUR
1681
5950-00-681-7270INTERCHANGEABLE
TRANSFORMER,POWER
1681
5910-00-891-2390INTERCHANGEABLE
CAPACITOR,FIXED,PLASTIC DIELECTR
0170-0002
5815-00-976-1239INTERCHANGEABLE
ARM
4820-01-154-1195INTERCHANGEABLE
CONTROL VALVE,GEAR
5305-01-174-8935INTERCHANGEABLE
SCREW,MACHINE
930810
5315-01-205-4186INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
1681

Frequently Asked Questions

What is NSN 5310-01-117-5063?

NSN 5310-01-117-5063 is a Washer,flat, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-117-5063?

NSN 5310-01-117-5063 has 3 cross-referenced part numbers: 1TD674 (Oshkosh Corp), 1681 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic), 1TD674 (Oshkosh Defense Llc).

What NSN replaces 5310-01-117-5063?

There are 12 known substitutes for 5310-01-117-5063: 6610-00-128-7762, 5905-00-192-3497, 6240-00-255-0163 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1681?

Key specifications for 1681: Thickness: 0.021 INCHES MINIMUM AND 0.041 INCHES MAXIMUM IN; Material: STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL; Material Document and Classification: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL; Center Hole Shape Style: ROUND. 9 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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