PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21318Washer,flat

Stanley Black & Decker, Inc. Dba Stanley Hydraulic Tools Div Stanley Hydraulic Tools · NSN 5310-01-678-1070 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-678-1070 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-678-1070. Primary manufacturer part number: 21318.
Features
  • Washer,flat — FSC 5310
  • Overall Diameter: 1.375 INCHES NOMINAL IN
  • Hole Diameter: 0.812 INCHES NOMINAL IN
  • Thickness: 0.100 INCHES NOMINAL IN
  • Surface Treatment: ZINC OVERALL
  • 1 verified cross-reference
  • Primary manufacturer: Stanley Black & Decker, Inc. Dba Stanley Hydraulic Tools Div Stanley Hydraulic Tools
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-678-1070, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Stanley Black & Decker, Inc. Dba Stanley Hydraulic Tools Div Stanley Hydraulic Tools. Government technical data includes 4 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-678-1070
Primary Part Number21318
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerStanley Black & Decker, Inc. Dba Stanley Hydraulic Tools Div Stanley Hydraulic Tools
StatusACTIVE
Overall Diameter1.375 INCHES NOMINAL IN
Hole Diameter0.812 INCHES NOMINAL IN
Thickness0.100 INCHES NOMINAL IN
Surface TreatmentZINC OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
3520-00-390-0194 INTERCHANGEABLE
Cutter,trimmer
9540-00-596-3010 INTERCHANGEABLE
Angle,structural
4030-01-098-700821318 INTERCHANGEABLE
Wire Clamp
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
3120-01-190-414221318 INTERCHANGEABLE
Bushing,sleeve
Moog Inc. Dba Ampac-Isp Corp
4320-01-324-371421318 INTERCHANGEABLE
Balance Ring and Pin
Eaton Corporation Div Eaton Fluid Power
4320-01-336-180021318 INTERCHANGEABLE
Pump,centrifugal
Industrial Technologies and Services Llc
7045-01-406-405198310 INTERCHANGEABLE
Cd-Rom Storage Case
Abm Federal Sales, Inc. Dba Abm Federal
7490-01-459-826435250 INTERCHANGEABLE
Oil,shredding Machine
Fellowes Inc
5340-01-522-734962-40-211-2 INTERCHANGEABLE
Latch,rim
Southco Inc
1005-01-562-091321318 INTERCHANGEABLE
Handguard Freefloat
Charles Reed Knight Jr Dba Knight's Armament Company
Cross-Reference Index
Part NumberManufacturer
21318 PRIMARY Stanley Black & Decker, Inc. Dba Stanley Hydraulic Tools Div Stanley Hydraulic Tools (USA)
Related Parts
3520-00-390-0194INTERCHANGEABLE
CUTTER,TRIMMER
9540-00-596-3010INTERCHANGEABLE
ANGLE,STRUCTURAL
4030-01-098-7008INTERCHANGEABLE
WIRE CLAMP
21318
3120-01-190-4142INTERCHANGEABLE
BUSHING,SLEEVE
21318
4320-01-324-3714INTERCHANGEABLE
BALANCE RING AND PIN
21318
4320-01-336-1800INTERCHANGEABLE
PUMP,CENTRIFUGAL
21318
7045-01-406-4051INTERCHANGEABLE
CD-ROM STORAGE CASE
98310
7490-01-459-8264INTERCHANGEABLE
OIL,SHREDDING MACHINE
35250
5340-01-522-7349INTERCHANGEABLE
LATCH,RIM
62-40-211-2
1005-01-562-0913INTERCHANGEABLE
HANDGUARD FREEFLOAT
21318

Frequently Asked Questions

What is NSN 5310-01-678-1070?

NSN 5310-01-678-1070 is a Washer,flat, manufactured by Stanley Black & Decker, Inc. Dba Stanley Hydraulic Tools Div Stanley Hydraulic Tools, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-678-1070?

NSN 5310-01-678-1070 has 1 cross-referenced part number: 21318 (Stanley Black & Decker, Inc. Dba Stanley Hydraulic Tools Div Stanley Hydraulic Tools).

What NSN replaces 5310-01-678-1070?

There are 10 known substitutes for 5310-01-678-1070: 3520-00-390-0194, 9540-00-596-3010, 4030-01-098-7008 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21318?

Key specifications for 21318: Overall Diameter: 1.375 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: WASHER; Hole Diameter: 0.812 INCHES NOMINAL IN; End Item Identification: 016691345,ENGINE AND BLOWER PARTS. 7 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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