PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21553Plate,identification

Smiths Aerospace, Inc., Electronic Systems-Grand Rapids · NSN 9905-01-100-4934 · FSC 9905 · No Item Name Available
Verified by PartsTable
NSN 9905-01-100-4934 — this item is cataloged by the U.S. Government under National Stock Number 9905-01-100-4934. Primary manufacturer part number: 21553.
Features
  • Plate,identification — FSC 9905
  • Material: ALUMINUM ALLOY
  • Marking Designation: LEGEND SINGLE SIDE
  • Material Document and Classification: QQ-A-250/1, ALLOY 1100, H14 FED SPEC SINGLE MATERIAL RESPONSE
  • Basic Shape Style: RECTANGULAR
  • Thickness: 0.032 INCHES NOMINAL IN
  • Length: 3.050 INCHES MINIMUM AND 3.070 INCHES MAXIMUM IN
  • Width: 1.120 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
Applications
  • Applications requiring Aluminum Alloy construction
General Description

The Plate,identification, cataloged under National Stock Number 9905-01-100-4934, is classified within Federal Supply Class 9905 (No Item Name Available) of the Miscellaneous group. The primary manufacturer of record is Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. Government technical data includes 7 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. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN9905-01-100-4934
Primary Part Number21553
Item NamePlate,identification
FSC / FSG9905 / 99 — No Item Name Available
ManufacturerSmiths Aerospace, Inc., Electronic Systems-Grand Rapids
StatusACTIVE
MaterialALUMINUM ALLOY
Marking DesignationLEGEND SINGLE SIDE
Material Document and ClassificationQQ-A-250/1, ALLOY 1100, H14 FED SPEC SINGLE MATERIAL RESPONSE
Basic Shape StyleRECTANGULAR
Thickness0.032 INCHES NOMINAL IN
Length3.050 INCHES MINIMUM AND 3.070 INCHES MAXIMUM IN
Width1.120 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
6685-00-183-7811TA350-1297149 INTERCHANGEABLE
Indicator,humidity,plug
Agm Container Controls Inc Dba Agm Container Controls Inc
4820-00-506-28702155-3 INTERCHANGEABLE
Disk,valve
Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
4820-00-595-2761284142N INTERCHANGEABLE
Valve,safety Relief
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
4310-00-810-2818P8650A124 INTERCHANGEABLE
Plunger,valve
Elliott Company Div Jeannette
6515-01-185-8836022110-10 INTERCHANGEABLE
Curette,uterine,suction
Olympus America Inc
4820-01-517-3077 INTERCHANGEABLE
Valve,ball
Cross-Reference Index
Part NumberManufacturer
21553 PRIMARY Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA)
Related Parts
6685-00-183-7811INTERCHANGEABLE
INDICATOR,HUMIDITY,PLUG
TA350-1297149
4820-00-506-2870INTERCHANGEABLE
DISK,VALVE
2155-3
4820-00-595-2761INTERCHANGEABLE
VALVE,SAFETY RELIEF
284142N
4310-00-810-2818INTERCHANGEABLE
PLUNGER,VALVE
P8650A124
6515-01-185-8836INTERCHANGEABLE
CURETTE,UTERINE,SUCTION
022110-10
4820-01-517-3077INTERCHANGEABLE
VALVE,BALL

Frequently Asked Questions

What is NSN 9905-01-100-4934?

NSN 9905-01-100-4934 is a Plate,identification, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 9905 (No Item Name Available). Status: active.

What are the part numbers for NSN 9905-01-100-4934?

NSN 9905-01-100-4934 has 1 cross-referenced part number: 21553 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).

What NSN replaces 9905-01-100-4934?

There are 6 known substitutes for 9905-01-100-4934: 6685-00-183-7811, 4820-00-506-2870, 4820-00-595-2761 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21553?

Key specifications for 21553: Material: ALUMINUM ALLOY; Marking Designation: LEGEND SINGLE SIDE; Material Document and Classification: QQ-A-250/1, ALLOY 1100, H14 FED SPEC SINGLE MATERIAL RESPONSE; Basic Shape Style: RECTANGULAR. 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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