PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet
MRO / Aircraft Components and Accessories / 1660-00-166-6502

50D42Valve,head

Grimes Aerospace Company · NSN 1660-00-166-6502 · FSC 1660 · No Item Name Available
Verified by PartsTable
NSN 1660-00-166-6502 — this item is cataloged by the U.S. Government under National Stock Number 1660-00-166-6502. Primary manufacturer part number: 50D42.
MRO FSG 16 NO ITEM NAME AVAILABLE Technical Drawing
1660-00-166-6502 — No Item Name Available illustration
Features
  • Valve,head — FSC 1660
  • General Characteristics Item Description: ALUMINUM ALLOY; 1.250 IN. O/A H; 2.810 IN. W ACROSS FLATS;1 INLET INTERNAL; INLET COUNTERBORE 0.1562 IN. MIN,0.1567 IN. MAX;0.160 IN. DEEP 6 MOUNTING HOLES; 0.125 IN. DIA OF BYPASS HOLE;COUNTERBORED; 0.234 IN. MIN,0.236 IN. MAX; 0.095 IN. DEEP IN
  • 1 verified cross-reference
  • Primary manufacturer: Grimes Aerospace Company
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,head, cataloged under National Stock Number 1660-00-166-6502, is classified within Federal Supply Class 1660 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Grimes Aerospace Company. Government technical data includes 1 verified specification, 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1660-00-166-6502
Primary Part Number50D42
Item NameValve,head
FSC / FSG1660 / 16 — No Item Name Available
ManufacturerGrimes Aerospace Company
StatusACTIVE
General Characteristics Item DescriptionALUMINUM ALLOY; 1.250 IN. O/A H; 2.810 IN. W ACROSS FLATS;1 INLET INTERNAL; INLET COUNTERBORE 0.1562 IN. MIN,0.1567 IN. MAX;0.160 IN. DEEP 6 MOUNTING HOLES; 0.125 IN. DIA OF BYPASS HOLE;COUNTERBORED; 0.234 IN. MIN,0.236 IN. MAX; 0.095 IN. DEEP IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
⇄ Verified Substitutes 1
2590-00-424-0891205267N INTERCHANGEABLE
Bracket,vehicular Components
Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems
Cross-Reference Index
Part NumberManufacturer
50D42 PRIMARY Grimes Aerospace Company (USA)
Related Parts
2590-00-424-0891INTERCHANGEABLE
BRACKET,VEHICULAR COMPONENTS
205267N

Frequently Asked Questions

What is NSN 1660-00-166-6502?

NSN 1660-00-166-6502 is a Valve,head, manufactured by Grimes Aerospace Company, classified under FSC 1660 (No Item Name Available). Status: active.

What are the part numbers for NSN 1660-00-166-6502?

NSN 1660-00-166-6502 has 1 cross-referenced part number: 50D42 (Grimes Aerospace Company).

What NSN replaces 1660-00-166-6502?

There is 1 known substitute for 1660-00-166-6502: 2590-00-424-0891. Verify interchangeability with system specifications before substitution.

What are the specifications of 50D42?

Key specifications for 50D42: General Characteristics Item Description: ALUMINUM ALLOY; 1.250 IN. O/A H; 2.810 IN. W ACROSS FLATS;1 INLET INTERNAL; INLET COUNTERBORE 0.1562 IN. MIN,0.1567 IN. MAX;0.160 IN. DEEP 6 MOUNTING HOLES; 0.125 IN. DIA OF BYPASS HOLE;COUNTERBORED; 0.234 IN. MIN,0.236 IN. MAX; 0.095 IN. DEEP IN. 1 total characteristics are documented in the Federal Logistics Information System.

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