PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

505-204GSeal,plain

Bal Seal Engineering, Inc. · NSN 5330-01-037-1240 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-01-037-1240 — this item is cataloged by the U.S. Government under National Stock Number 5330-01-037-1240. Primary manufacturer part number: 505-204G.
Features
  • Seal,plain — FSC 5330
  • Construction: SOLID
  • Housing Bore Diameter: 0.625 INCHES NOMINAL IN
  • Material: STEEL COMP 302 SPRING
  • Temp Rating: 550.0 FAHRENHEIT DEGF
  • Accommodated Shaft Diameter: 0.375 INCHES NOMINAL IN
  • Seal Width: 0.170 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN
  • Material Document and Classification: QQ-W-423,COMP 302,COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Steel Comp 302 Spring construction
General Description

The Seal,plain, cataloged under National Stock Number 5330-01-037-1240, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Bal Seal Engineering, Inc.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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
NSN5330-01-037-1240
Primary Part Number505-204G
Item NameSeal,plain
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerBal Seal Engineering, Inc.
StatusACTIVE
ConstructionSOLID
Housing Bore Diameter0.625 INCHES NOMINAL IN
MaterialSTEEL COMP 302 SPRING
Temp Rating550.0 FAHRENHEIT DEGF
Accommodated Shaft Diameter0.375 INCHES NOMINAL IN
Seal Width0.170 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN
Material Document and ClassificationQQ-W-423,COMP 302,COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5999-00-097-112011452 INTERCHANGEABLE
Contact,electrical
Leslie Controls, Inc. Dba Leslie Controls Inc
5136-00-261-3215 INTERCHANGEABLE
Tap,thread Cutting
5133-00-262-2192 INTERCHANGEABLE
Drill,twist
4820-00-592-994911452 INTERCHANGEABLE
Valve,check
Eaton Aerospace Llc
2815-00-627-3479114-0051 INTERCHANGEABLE
Connecting Rod,piston
Cummins Power Generation Inc.
5945-00-683-8334 INTERCHANGEABLE
Relay,electromagnetic
5950-00-763-3828 INTERCHANGEABLE
Transformer,power
4730-00-839-6380 INTERCHANGEABLE
Elbow,tube
5950-00-962-2116 INTERCHANGEABLE
Reactor
5340-01-013-421025676 INTERCHANGEABLE
Clamp,loop
Williams International Co., L.l.c.
Cross-Reference Index
Part NumberManufacturer
25676 Jetstream of Houston, Llp Dba Jetstream of Houston Llp (USA)
11452 Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group (USA)
505-204G PRIMARY Bal Seal Engineering, Inc. (USA)
Related Parts
5999-00-097-1120INTERCHANGEABLE
CONTACT,ELECTRICAL
11452
5136-00-261-3215INTERCHANGEABLE
TAP,THREAD CUTTING
5133-00-262-2192INTERCHANGEABLE
DRILL,TWIST
4820-00-592-9949INTERCHANGEABLE
VALVE,CHECK
11452
2815-00-627-3479INTERCHANGEABLE
CONNECTING ROD,PISTON
114-0051
5945-00-683-8334INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5950-00-763-3828INTERCHANGEABLE
TRANSFORMER,POWER
4730-00-839-6380INTERCHANGEABLE
ELBOW,TUBE
5950-00-962-2116INTERCHANGEABLE
REACTOR
5340-01-013-4210INTERCHANGEABLE
CLAMP,LOOP
25676
6830-01-037-1161INTERCHANGEABLE
NITROGEN
25676
4730-01-263-9681INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
11452

Frequently Asked Questions

What is NSN 5330-01-037-1240?

NSN 5330-01-037-1240 is a Seal,plain, manufactured by Bal Seal Engineering, Inc., classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-01-037-1240?

NSN 5330-01-037-1240 has 3 cross-referenced part numbers: 25676 (Jetstream of Houston, Llp Dba Jetstream of Houston Llp), 11452 (Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group), 505-204G (Bal Seal Engineering, Inc.).

What NSN replaces 5330-01-037-1240?

There are 12 known substitutes for 5330-01-037-1240: 5999-00-097-1120, 5136-00-261-3215, 5133-00-262-2192 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 505-204G?

Key specifications for 505-204G: Construction: SOLID; Housing Bore Diameter: 0.625 INCHES NOMINAL IN; Material: STEEL COMP 302 SPRING; Temp Rating: 550.0 FAHRENHEIT DEGF. 7 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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