PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

122-4322691 P/N 21Washer,flat

Naval Sea Systems Command · NSN 5310-01-445-7647 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-445-7647 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-445-7647. Primary manufacturer part number: 122-4322691 P/N 21.
Features
  • Washer,flat — FSC 5310
  • Material: STEEL OVERALL
  • Cross-Sectional Shape Style: RECTANGULAR
  • Overall Diameter: 2.000 INCHES NOMINAL IN
  • Thickness: 0.125 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
  • Center Hole Shape Style: ROUND
  • Hole Diameter: 0.812 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-445-7647, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 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
NSN5310-01-445-7647
Primary Part Number122-4322691 P/N 21
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
MaterialSTEEL OVERALL
Cross-Sectional Shape StyleRECTANGULAR
Overall Diameter2.000 INCHES NOMINAL IN
Thickness0.125 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Center Hole Shape StyleROUND
Hole Diameter0.812 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-241-285373602 INTERCHANGEABLE
Transformer,power
Hammond Mfg Co Ltd
5325-00-275-44641298861-1 INTERCHANGEABLE
Eyelet,metallic
Honeywell Intl Inc Defense Avionics Systems
5330-00-348-405336238 INTERCHANGEABLE
Gasket
Honeywell International Inc. Div Aerospace - Torrance
5999-00-369-1464563-4902-1009469PC1H INTERCHANGEABLE
Contact,electrical
Naval Ship Systems Command
5340-00-532-92313B1084 INTERCHANGEABLE
Clamp,loop
Napco International Llc Dba Napco International Inc
5975-00-819-1860BBU-400 INTERCHANGEABLE
Bushing,electrical Conduit
Egs Electrical Group Appleton Div
6640-01-086-4148 INTERCHANGEABLE
Filter Unit,microporous
5961-01-115-7387 INTERCHANGEABLE
Transistor
4820-01-267-1328519-9579 INTERCHANGEABLE
Valve,safety Relief
Landoll Company, Llc
5930-01-491-1416297704439 INTERCHANGEABLE
Switch,flow
Dometic Environmental Corp
Cross-Reference Index
Part NumberManufacturer
A-400 Crane Carrier Company, Llc (USA)
362-38 Crane Carrier Company, Llc (USA)
2 OD X 13/16 ID X 1/8 THK Naval Sea Systems Command (USA)
A362-0038 Crane Carrier Company, Llc (USA)
122-5588687 PC 21 Naval Sea Systems Command (USA)
2 OD X 13/16 ID X 1/8 LG Naval Sea Systems Command (USA)
122-4322691 P/N 21 PRIMARY Naval Sea Systems Command (USA)
Related Parts
5950-00-241-2853INTERCHANGEABLE
TRANSFORMER,POWER
73602
5325-00-275-4464INTERCHANGEABLE
EYELET,METALLIC
1298861-1
5330-00-348-4053INTERCHANGEABLE
GASKET
36238
5999-00-369-1464INTERCHANGEABLE
CONTACT,ELECTRICAL
563-4902-1009469PC1H
5340-00-532-9231INTERCHANGEABLE
CLAMP,LOOP
3B1084
5975-00-819-1860INTERCHANGEABLE
BUSHING,ELECTRICAL CONDUIT
BBU-400
6640-01-086-4148INTERCHANGEABLE
FILTER UNIT,MICROPOROUS
5961-01-115-7387INTERCHANGEABLE
TRANSISTOR
4820-01-267-1328INTERCHANGEABLE
VALVE,SAFETY RELIEF
519-9579
5930-01-491-1416INTERCHANGEABLE
SWITCH,FLOW
297704439
5945-01-520-4509INTERCHANGEABLE
RELAY,HYBRID
1616056-1
5975-01-663-5700INTERCHANGEABLE
COVER,JUNCTION BOX
A400

Frequently Asked Questions

What is NSN 5310-01-445-7647?

NSN 5310-01-445-7647 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-445-7647?

NSN 5310-01-445-7647 has 7 cross-referenced part numbers: A-400 (Crane Carrier Company, Llc), 362-38 (Crane Carrier Company, Llc), 2 OD X 13/16 ID X 1/8 THK (Naval Sea Systems Command), A362-0038 (Crane Carrier Company, Llc), 122-5588687 PC 21 (Naval Sea Systems Command) and 2 more.

What NSN replaces 5310-01-445-7647?

There are 12 known substitutes for 5310-01-445-7647: 5950-00-241-2853, 5325-00-275-4464, 5330-00-348-4053 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 122-4322691 P/N 21?

Key specifications for 122-4322691 P/N 21: Material: STEEL OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Overall Diameter: 2.000 INCHES NOMINAL IN; End Item Identification: 2320-01-452-5579. 8 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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