PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31521Cap,filler Opening

Gates Corporation · NSN 2930-01-240-6120 · FSC 2930 · No Item Name Available
Verified by PartsTable
NSN 2930-01-240-6120 — this item is cataloged by the U.S. Government under National Stock Number 2930-01-240-6120. Primary manufacturer part number: 31521.
Features
  • Cap,filler Opening — FSC 2930
  • Style Designator: CLOSED COOLING SYSTEM TYPE W/ LOOSE VACUUM VALVE
  • Material: STEEL CORROSION RESISTING OVERALL
  • Outside Diameter: 2.250 INCHES NOMINAL IN
  • System for Which Designed: PRESSURIZED
  • Pressure Relief Method: AUTOMATIC
  • 3 verified cross-references
  • Primary manufacturer: Gates Corporation
Applications
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Cap,filler Opening, cataloged under National Stock Number 2930-01-240-6120, is classified within Federal Supply Class 2930 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Gates Corporation. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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
NSN2930-01-240-6120
Primary Part Number31521
Item NameCap,filler Opening
FSC / FSG2930 / 29 — No Item Name Available
ManufacturerGates Corporation
StatusACTIVE
Style DesignatorCLOSED COOLING SYSTEM TYPE W/ LOOSE VACUUM VALVE
MaterialSTEEL CORROSION RESISTING OVERALL
Outside Diameter2.250 INCHES NOMINAL IN
System for Which DesignedPRESSURIZED
Pressure Relief MethodAUTOMATIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5940-00-107-1481MS20659-104 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
5920-00-221-58927478924P16 INTERCHANGEABLE
Fuse,cartridge
Lockheed Martin Corporation Div Rms
1650-00-497-7296572581 INTERCHANGEABLE
Filter Assy Fluid
Purolator Facet Inc. Div Parker Aerospace Filtration Division Dba Purolator Facet, in
2530-00-528-9090121-501 INTERCHANGEABLE
Brake Drum
Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc
4730-00-529-514072-2289-1 INTERCHANGEABLE
Clamp,hose
Department of Defense Project Manager-Mobile Electric Power
3110-00-533-67781795928 INTERCHANGEABLE
Cup,tapered Roller Bearing
Chrysler Realty Company Llc Dba Daimler Chrysler
4730-00-554-7832 INTERCHANGEABLE
Adapter,straight,tube to Hose
4730-01-035-8354 INTERCHANGEABLE
Clamp,hose
3110-01-172-6473100382 INTERCHANGEABLE
Bearing,ball,annular
Champion Industries Inc.
5306-01-236-614331310 INTERCHANGEABLE
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Moog Inc. Dba Ampac-Isp Corp
Cross-Reference Index
Part NumberManufacturer
ER-10 Stant Corp Edelmann Div (USA)
31310 Gates Corporation (USA)
31521 PRIMARY Gates Corporation (USA)
Related Parts
5940-00-107-1481INTERCHANGEABLE
TERMINAL,LUG
MS20659-104
5920-00-221-5892INTERCHANGEABLE
FUSE,CARTRIDGE
7478924P16
1650-00-497-7296INTERCHANGEABLE
FILTER ASSY FLUID
572581
2530-00-528-9090INTERCHANGEABLE
BRAKE DRUM
121-501
4730-00-529-5140INTERCHANGEABLE
CLAMP,HOSE
72-2289-1
3110-00-533-6778INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
1795928
4730-00-554-7832INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4730-01-035-8354INTERCHANGEABLE
CLAMP,HOSE
3110-01-172-6473INTERCHANGEABLE
BEARING,BALL,ANNULAR
100382
5306-01-236-6143INTERCHANGEABLE
BOLT,MACHINE
31310
3110-01-316-5324INTERCHANGEABLE
BEARING,ROLLER,TAPERED
31310
5305-01-354-4679INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
3152-1

Frequently Asked Questions

What is NSN 2930-01-240-6120?

NSN 2930-01-240-6120 is a Cap,filler Opening, manufactured by Gates Corporation, classified under FSC 2930 (No Item Name Available). Status: active.

What are the part numbers for NSN 2930-01-240-6120?

NSN 2930-01-240-6120 has 3 cross-referenced part numbers: ER-10 (Stant Corp Edelmann Div), 31310 (Gates Corporation), 31521 (Gates Corporation).

What NSN replaces 2930-01-240-6120?

There are 12 known substitutes for 2930-01-240-6120: 5940-00-107-1481, 5920-00-221-5892, 1650-00-497-7296 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31521?

Key specifications for 31521: Special Features: FOR BUICK,PASSENGER CARS.1969-70; Style Designator: CLOSED COOLING SYSTEM TYPE W/ LOOSE VACUUM VALVE; Material: STEEL CORROSION RESISTING OVERALL; Outside Diameter: 2.250 INCHES NOMINAL IN. 6 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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