PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AN20Nut,plain,round

Fag Bearings Corporation · NSN 5310-00-185-6375 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-185-6375 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-185-6375. Primary manufacturer part number: AN20.
Features
  • Nut,plain,round — FSC 5310
  • Thread Pitch Diameters: +3.8639 TO 3.8713 INCHES IN
  • Hardness Rating: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
  • Thread Quantity Per Inch: 12
  • Thread Series: UNS
  • Nominal Thread Size: 3.918 INCHES IN
  • Nondefinitive Spec/std Data: 1 TYPE AND 1 CLASS
  • Thread Direction: RIGHT-HAND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1005 Overall construction
General Description

The Nut,plain,round, cataloged under National Stock Number 5310-00-185-6375, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Fag Bearings Corporation. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 41 commercial cross-references from 29 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-185-6375
Primary Part NumberAN20
Item NameNut,plain,round
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerFag Bearings Corporation
StatusCANCELLED
Thread Pitch Diameters+3.8639 TO 3.8713 INCHES IN
Hardness Rating66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
Thread Quantity Per Inch12
Thread SeriesUNS
Nominal Thread Size3.918 INCHES IN
Nondefinitive Spec/std Data1 TYPE AND 1 CLASS
Thread DirectionRIGHT-HAND
Nut Diameter5.1875 INCHES NOMINAL IN
Drive Point Quantity4
Drive Point Width0.375 INCHES NOMINAL IN
Nut Thickness0.750 INCHES NOMINAL IN
MaterialSTEEL COMP 1005 OVERALL
Drive Point Depth0.1563 INCHES NOMINAL IN
Nut StyleROUND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5970-00-042-1533C29.6-56-1 INTERCHANGEABLE
Insulator,pin
American National Standards Institute Incorporated Dba American National Standards Institute
5930-00-172-90663824-6 INTERCHANGEABLE
Switch,rotary
Electro Switch Corp. Dba Electro Switch Corp
4730-00-264-9171 INTERCHANGEABLE
Reducer,tube
5905-00-279-201812772-3 INTERCHANGEABLE
Variable Resistor
Electric Regulator Corp
5325-00-358-88291854M169 INTERCHANGEABLE
Ring,retaining
Meritor Heavy Vehicle Systems, Llc
6680-00-458-2295AN20 INTERCHANGEABLE
Transmitter,rate of Flow
Ametek Inc Schutte and Koerting Div
5985-00-884-6727127723 INTERCHANGEABLE
Waveguide Assembly
L3harris Technologies, Inc Div Space & Airborne Systems
5345-00-973-0824M27-J45 INTERCHANGEABLE
Stone Set and Guide
Sunnen Products Co
4710-01-045-868056385-5 INTERCHANGEABLE
Tube Assembly,metal
L3harris Technologies, Inc. Div Space and Airborne Systems
4730-01-107-4017 INTERCHANGEABLE
Connector,valve
Cross-Reference Index
Part NumberManufacturer
AN20 Fag Bearings Corporation (USA)
AN20 Westinghouse Electric Corp (USA)
AN20 Patterson Pump Co Div Patterson Pump Company (USA)
72-6971-320 Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco (USA)
WW9481225PC82 General Electric Company (USA)
AN20 Whittet-Higgins Company (USA)
12Z335-27 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
1X96 Link-Belt Cranes, L.p., Lllp (USA)
HR6660 Ecolaire Inc Baldwin-Hamilton Co Div (USA)
AN20 Dresser-Rand Co Worthington Compressor Opn a Joint Venture (USA)
AN20 General Motors Corp Delco Moraine Ndh Div (USA)
AN20 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
61255-7-75 Patterson Pump Co Div Patterson Pump Company (USA)
AN20 Federal-Mogul Corp Government Sales Dept (USA)
MILN21337 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
AN20 Elliott Company Div Jeannette (USA)
AN200 Timken Co Div the Timken Company (USA)
AN20 General Electric Company (USA)
1X96 Fmc Corp Link-Belt Div (USA)
AN20 The Timken Corporation (USA)
Related Parts
5970-00-042-1533INTERCHANGEABLE
INSULATOR,PIN
C29.6-56-1
5930-00-172-9066INTERCHANGEABLE
SWITCH,ROTARY
3824-6
4730-00-264-9171INTERCHANGEABLE
REDUCER,TUBE
5905-00-279-2018INTERCHANGEABLE
VARIABLE RESISTOR
12772-3
5325-00-358-8829INTERCHANGEABLE
RING,RETAINING
1854M169
6680-00-458-2295INTERCHANGEABLE
TRANSMITTER,RATE OF FLOW
AN20
5985-00-884-6727INTERCHANGEABLE
WAVEGUIDE ASSEMBLY
127723
5345-00-973-0824INTERCHANGEABLE
STONE SET AND GUIDE
M27-J45
4710-01-045-8680INTERCHANGEABLE
TUBE ASSEMBLY,METAL
56385-5
4730-01-107-4017INTERCHANGEABLE
CONNECTOR,VALVE
7690-01-300-5022INTERCHANGEABLE
LABEL
5920-01-433-3554INTERCHANGEABLE
FUSE,CARTRIDGE
127100 REV B IT9

Frequently Asked Questions

What is NSN 5310-00-185-6375?

NSN 5310-00-185-6375 is a Nut,plain,round, manufactured by Fag Bearings Corporation, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-185-6375?

NSN 5310-00-185-6375 has 41 cross-referenced part numbers: AN20 (Fag Bearings Corporation), AN20 (Westinghouse Electric Corp), AN20 (Patterson Pump Co Div Patterson Pump Company), 72-6971-320 (Coltec Industries Inc Dba Fairbanks Morse Engine Fm/alco), WW9481225PC82 (General Electric Company) and 36 more.

What NSN replaces 5310-00-185-6375?

There are 12 known substitutes for 5310-00-185-6375: 5970-00-042-1533, 5930-00-172-9066, 4730-00-264-9171 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AN20?

Key specifications for AN20: Thread Pitch Diameters: +3.8639 TO 3.8713 INCHES IN; Hardness Rating: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM; Thread Quantity Per Inch: 12; Thread Series: UNS. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-185-6375 still in active supply?

NSN 5310-00-185-6375 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.
PartsTable Design LLC · partstable.com