PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31821Cap,filler Opening

Gates Corporation · NSN 2590-01-220-9892 · FSC 2590 · No Item Name Available
Verified by PartsTable
NSN 2590-01-220-9892 — this item is cataloged by the U.S. Government under National Stock Number 2590-01-220-9892. Primary manufacturer part number: 31821.
Features
  • Cap,filler Opening — FSC 2590
  • Locking Device Type: INTEGRAL KEY LOCK
  • Style Designator: LOCKING TYPE VENTED
  • Material: COPPER ALLOY OVERALL
  • Thread Series Designator: UN
  • System for Which Designed: NONPRESSURIZED
  • Thread Quantity: 12 PER INCH
  • Retaining Device Length: 8.250 INCHES NOMINAL IN
Applications
  • Applications requiring Copper Alloy Overall construction
General Description

The Cap,filler Opening, cataloged under National Stock Number 2590-01-220-9892, is classified within Federal Supply Class 2590 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Gates Corporation. 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. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2590-01-220-9892
Primary Part Number31821
Item NameCap,filler Opening
FSC / FSG2590 / 25 — No Item Name Available
ManufacturerGates Corporation
StatusACTIVE
Locking Device TypeINTEGRAL KEY LOCK
Style DesignatorLOCKING TYPE VENTED
MaterialCOPPER ALLOY OVERALL
Thread Series DesignatorUN
System for Which DesignedNONPRESSURIZED
Thread Quantity12 PER INCH
Retaining Device Length8.250 INCHES NOMINAL IN
Outside Diameter2.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
1680-00-024-8712 INTERCHANGEABLE
Screw-Ball,actuator
5330-00-378-9199 INTERCHANGEABLE
Gasket
5999-01-020-9542 INTERCHANGEABLE
Contact,electrical
4820-01-407-325731821 INTERCHANGEABLE
Seat,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
6625-01-602-709631821 INTERCHANGEABLE
Test Set,relay
Basler Electric Co
Cross-Reference Index
Part NumberManufacturer
31821 PRIMARY Gates Corporation (USA)
Related Parts
1680-00-024-8712INTERCHANGEABLE
SCREW-BALL,ACTUATOR
5330-00-378-9199INTERCHANGEABLE
GASKET
5999-01-020-9542INTERCHANGEABLE
CONTACT,ELECTRICAL
4820-01-407-3257INTERCHANGEABLE
SEAT,VALVE
31821
6625-01-602-7096INTERCHANGEABLE
TEST SET,RELAY
31821

Frequently Asked Questions

What is NSN 2590-01-220-9892?

NSN 2590-01-220-9892 is a Cap,filler Opening, manufactured by Gates Corporation, classified under FSC 2590 (No Item Name Available). Status: active.

What are the part numbers for NSN 2590-01-220-9892?

NSN 2590-01-220-9892 has 1 cross-referenced part number: 31821 (Gates Corporation).

What NSN replaces 2590-01-220-9892?

There are 5 known substitutes for 2590-01-220-9892: 1680-00-024-8712, 5330-00-378-9199, 5999-01-020-9542 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31821?

Key specifications for 31821: Locking Device Type: INTEGRAL KEY LOCK; Style Designator: LOCKING TYPE VENTED; Material: COPPER ALLOY OVERALL; Thread Series Designator: UN. 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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