PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31156Washer,flat

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5310-00-637-2106 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-637-2106 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-637-2106. Primary manufacturer part number: 31156.
Features
  • Washer,flat — FSC 5310
  • Peripheral Shape Style: ROUND
  • Thickness: 0.094 INCHES NOMINAL IN
  • Material: STEEL COMP 1212 AND STEEL COMP 1010 OVERALL
  • Material Document and Classification: SAE FED SPEC ALL MATERIAL RESPONSES AND AMS 5040 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5042 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5044 ASSN STD 2ND MATERIAL RESPONSE OVERALL
  • Overall Diameter: 0.875 INCHES NOMINAL IN
  • Hole Diameter: 0.391 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1212 and Steel Comp 1010 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-637-2106, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 8 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-637-2106
Primary Part Number31156
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusACTIVE
Peripheral Shape StyleROUND
Thickness0.094 INCHES NOMINAL IN
MaterialSTEEL COMP 1212 AND STEEL COMP 1010 OVERALL
Material Document and ClassificationSAE FED SPEC ALL MATERIAL RESPONSES AND AMS 5040 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5042 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5044 ASSN STD 2ND MATERIAL RESPONSE OVERALL
Overall Diameter0.875 INCHES NOMINAL IN
Hole Diameter0.391 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5935-00-145-561610-074614-002 INTERCHANGEABLE
Insert,electrical Connector
Amphenol Corp Div Amphenol Aerospace Operations
5315-00-389-864531156 INTERCHANGEABLE
Pin,disc Assembly
Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions
5365-00-391-3328152862 INTERCHANGEABLE
Spacer,sleeve
Honeywell International Inc Dba Honeywell Div Consumer Products Group
4730-01-036-7829299-5472868 INTERCHANGEABLE
Nozzle,spray,fluid-Emulsion
Naval Sea Systems Command
4530-01-283-386331156 INTERCHANGEABLE
Parts Kit,oil Burner
Scott and Fetzer Co the Wayne Home Equipment Div
3130-01-350-0600 INTERCHANGEABLE
Bearing Unit,roller
5961-01-365-923831156 INTERCHANGEABLE
Rectifier,semiconductor Device
Adams Rite Aerospace, Inc
5307-01-377-1802 INTERCHANGEABLE
Stud,continuous Thread
5930-01-399-333431156 INTERCHANGEABLE
Switch,sensitive
Wilshire Corp
5120-01-437-1838 INTERCHANGEABLE
Wrench,box and Open End,combinat
Cross-Reference Index
Part NumberManufacturer
31156 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
5935-00-145-5616INTERCHANGEABLE
INSERT,ELECTRICAL CONNECTOR
10-074614-002
5315-00-389-8645INTERCHANGEABLE
PIN,DISC ASSEMBLY
31156
5365-00-391-3328INTERCHANGEABLE
SPACER,SLEEVE
152862
4730-01-036-7829INTERCHANGEABLE
NOZZLE,SPRAY,FLUID-EMULSION
299-5472868
4530-01-283-3863INTERCHANGEABLE
PARTS KIT,OIL BURNER
31156
3130-01-350-0600INTERCHANGEABLE
BEARING UNIT,ROLLER
5961-01-365-9238INTERCHANGEABLE
RECTIFIER,SEMICONDUCTOR DEVICE
31156
5307-01-377-1802INTERCHANGEABLE
STUD,CONTINUOUS THREAD
5930-01-399-3334INTERCHANGEABLE
SWITCH,SENSITIVE
31156
5120-01-437-1838INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
5307-01-607-2814INTERCHANGEABLE
STUD,CONTINUOUS THREAD
31156

Frequently Asked Questions

What is NSN 5310-00-637-2106?

NSN 5310-00-637-2106 is a Washer,flat, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-637-2106?

NSN 5310-00-637-2106 has 1 cross-referenced part number: 31156 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).

What NSN replaces 5310-00-637-2106?

There are 11 known substitutes for 5310-00-637-2106: 5935-00-145-5616, 5315-00-389-8645, 5365-00-391-3328 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31156?

Key specifications for 31156: Peripheral Shape Style: ROUND; Thickness: 0.094 INCHES NOMINAL IN; Material: STEEL COMP 1212 AND STEEL COMP 1010 OVERALL; Material Document and Classification: SAE FED SPEC ALL MATERIAL RESPONSES AND AMS 5040 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5042 ASSN STD 2ND MATERIAL RESPONSE OR AMS 5044 ASSN STD 2ND MATERIAL RESPONSE OVERALL. 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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