PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AP356AWasher,spring Tension

Mkt Geotechnical Systems · NSN 5310-00-871-8387 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-871-8387 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-871-8387. Primary manufacturer part number: AP356A.
Features
  • Washer,spring Tension — FSC 5310
  • Material: STEEL OVERALL
  • Outside Diameter: 2.000 INCHES NOMINAL IN
  • Hole Diameter: 0.750 INCHES NOMINAL IN
  • Material Thickness: 0.095 INCHES NOMINAL IN
  • 6 verified cross-references
  • Primary manufacturer: Mkt Geotechnical Systems
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Mechanical energy storage
  • Vibration dampening
General Description

The Washer,spring Tension, cataloged under National Stock Number 5310-00-871-8387, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mkt Geotechnical Systems. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 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
NSN5310-00-871-8387
Primary Part NumberAP356A
Item NameWasher,spring Tension
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMkt Geotechnical Systems
StatusCANCELLED
MaterialSTEEL OVERALL
Outside Diameter2.000 INCHES NOMINAL IN
Hole Diameter0.750 INCHES NOMINAL IN
Material Thickness0.095 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
3120-00-352-5755 INTERCHANGEABLE
Bearing,sleeve
5970-00-481-3350 INTERCHANGEABLE
Insulator,feedthru
Cross-Reference Index
Part NumberManufacturer
AP356A Mkt Geotechnical Systems (USA)
D408A Mkt Geotechnical Systems (USA)
D308A Mkt Geotechnical Systems (USA)
0200800 M K T Manufacturing Inc (USA)
AP356 Mkt Geotechnical Systems (USA)
D208A Mkt Geotechnical Systems (USA)
Related Parts
3120-00-352-5755INTERCHANGEABLE
BEARING,SLEEVE
5970-00-481-3350INTERCHANGEABLE
INSULATOR,FEEDTHRU

Frequently Asked Questions

What is NSN 5310-00-871-8387?

NSN 5310-00-871-8387 is a Washer,spring Tension, manufactured by Mkt Geotechnical Systems, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-871-8387?

NSN 5310-00-871-8387 has 6 cross-referenced part numbers: AP356A (Mkt Geotechnical Systems), D408A (Mkt Geotechnical Systems), D308A (Mkt Geotechnical Systems), 0200800 (M K T Manufacturing Inc), AP356 (Mkt Geotechnical Systems) and 1 more.

What NSN replaces 5310-00-871-8387?

There are 2 known substitutes for 5310-00-871-8387: 3120-00-352-5755, 5970-00-481-3350. Verify interchangeability with system specifications before substitution.

What are the specifications of AP356A?

Key specifications for AP356A: Material: STEEL OVERALL; Outside Diameter: 2.000 INCHES NOMINAL IN; Hole Diameter: 0.750 INCHES NOMINAL IN; Material Thickness: 0.095 INCHES NOMINAL IN. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-871-8387 still in active supply?

NSN 5310-00-871-8387 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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