PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B8556Washer,flat

Dresser, Llc · NSN 5310-00-274-9870 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-274-9870 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-274-9870. Primary manufacturer part number: B8556.
Features
  • Washer,flat — FSC 5310
  • Thickness: 0.062 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
  • Material: COPPER OVERALL
  • Overall Diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
  • Cross-Sectional Shape Style: RECTANGULAR
  • Peripheral Shape Style: ROUND
  • Hole Diameter: 0.396 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-274-9870, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Dresser, Llc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-274-9870
Primary Part NumberB8556
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerDresser, Llc
StatusCANCELLED
Thickness0.062 INCHES NOMINAL IN
Center Hole Shape StyleROUND
MaterialCOPPER OVERALL
Overall Diameter0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN
Cross-Sectional Shape StyleRECTANGULAR
Peripheral Shape StyleROUND
Hole Diameter0.396 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5940-00-143-466310-301-1-05 INTERCHANGEABLE
Terminal,stud
Concord Electronics, Inc.
4310-00-468-0031 INTERCHANGEABLE
Cap,main Bearing
4720-00-790-668520271 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5962-01-171-0986MM54C901J INTERCHANGEABLE
Microcircuit,digital
National Semiconductor Corporation
4820-01-182-078120271HS41M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
6220-01-196-954813450-1 INTERCHANGEABLE
Yoke,mounting
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5325-01-270-835920271 INTERCHANGEABLE
Ring,retaining
Kone Inc.
3020-01-274-4912 INTERCHANGEABLE
Pulley,groove
6515-01-463-4233 INTERCHANGEABLE
Drainage Unit,pleural Cavity
6350-01-695-152620271 INTERCHANGEABLE
Alarm,smoke,automatic
Aqualarm Inc
Cross-Reference Index
Part NumberManufacturer
6627386 General Electric Company (USA)
6627386 General Electric Co Air Conditioning Division of Consumer Products Group (USA)
8333156 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
FF-W-92B TY A CL F Federal Specifications Promulgated by General Services Administration Washington DC (USA)
B8556 PRIMARY Dresser, Llc (USA)
20-271 PRIMARY Dresser Industries Inc Leroi Div (USA)
Related Parts
5940-00-143-4663INTERCHANGEABLE
TERMINAL,STUD
10-301-1-05
4310-00-468-0031INTERCHANGEABLE
CAP,MAIN BEARING
4720-00-790-6685INTERCHANGEABLE
HOSE,PREFORMED
20271
5962-01-171-0986INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
MM54C901J
4820-01-182-0781INTERCHANGEABLE
VALVE,SAFETY RELIEF
20271HS41M
6220-01-196-9548INTERCHANGEABLE
YOKE,MOUNTING
13450-1
5325-01-270-8359INTERCHANGEABLE
RING,RETAINING
20271
3020-01-274-4912INTERCHANGEABLE
PULLEY,GROOVE
6515-01-463-4233INTERCHANGEABLE
DRAINAGE UNIT,PLEURAL CAVITY
6350-01-695-1526INTERCHANGEABLE
ALARM,SMOKE,AUTOMATIC
20271

Frequently Asked Questions

What is NSN 5310-00-274-9870?

NSN 5310-00-274-9870 is a Washer,flat, manufactured by Dresser, Llc, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-274-9870?

NSN 5310-00-274-9870 has 6 cross-referenced part numbers: 6627386 (General Electric Company), 6627386 (General Electric Co Air Conditioning Division of Consumer Products Group), 8333156 (U S Army Tank Automotive Command Amsta-Im-Mm), FF-W-92B TY A CL F (Federal Specifications Promulgated by General Services Administration Washington DC), B8556 (Dresser, Llc) and 1 more.

What NSN replaces 5310-00-274-9870?

There are 10 known substitutes for 5310-00-274-9870: 5940-00-143-4663, 4310-00-468-0031, 4720-00-790-6685 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B8556?

Key specifications for B8556: Thickness: 0.062 INCHES NOMINAL IN; Center Hole Shape Style: ROUND; Material: COPPER OVERALL; Overall Diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-274-9870 still in active supply?

NSN 5310-00-274-9870 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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