PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

965-4-1-4Cap Assembly,protective,muffler-

Mercury Products Corp · NSN 2990-00-352-9764 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-352-9764 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-352-9764. Primary manufacturer part number: 965-4-1-4.
Features
  • Cap Assembly,protective,muffler- — FSC 2990
  • Pipe Outside Diameter Accommodated: 4.438 INCHES IN
  • 10 verified cross-references
  • Primary manufacturer: Mercury Products Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cap Assembly,protective,muffler-, cataloged under National Stock Number 2990-00-352-9764, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Mercury Products Corp. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN2990-00-352-9764
Primary Part Number965-4-1-4
Item NameCap Assembly,protective,muffler-
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerMercury Products Corp
StatusCANCELLED
Pipe Outside Diameter Accommodated4.438 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-122-0602F2-1-2D95D INTERCHANGEABLE
Washer,flat
Pentair Pump Group, Inc. Dba Fairbanks Morse Pump
5940-00-156-7205110 INTERCHANGEABLE
Terminal,lug
Lax Electronics, Inc. Dba Automatic Connector Div Automatic Connector
5136-00-203-6504 INTERCHANGEABLE
Tap,thread Cutting
5133-00-234-5139 INTERCHANGEABLE
Drill,twist
5930-00-272-794010250H375-12 INTERCHANGEABLE
Switch,push
Eaton Corp Opns & Technical Center
2990-00-438-155111013-12 INTERCHANGEABLE
Cap Assembly,protective,muffler-
Systems Protection Group Us Llc
6615-00-471-367411014 INTERCHANGEABLE
Retainer,gyroscope
Atlantic Inertial Systems Inc Div Cheshire Division
5330-00-580-5327110-1/4 INTERCHANGEABLE
Packing with Retainer
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
5331-00-618-6020 INTERCHANGEABLE
O-Ring
6685-00-679-0908 INTERCHANGEABLE
Thermometer,self-Indicating
Cross-Reference Index
Part NumberManufacturer
965-4-1-4 PRIMARY Mercury Products Corp (USA)
63546 Davey Compressor Co Div of Keco Industries Inc (USA)
11014 Gleason Corp Anthes Div (USA)
82132053 Lucas Western Inc (USA)
965-4 1-4 PRIMARY Mercury Products Corp (USA)
PB1896 American Standard Inc Westinghouse Air Brake Co Div (USA)
63546 Jenny Products, Inc (USA)
NUMBER 13 Gleason Corp Anthes Div (USA)
4-1-40DPIPE770 PRIMARY Mercury Products Corp (USA)
HD8393 American Standard Inc Westinghouse Air Brake Co Div (USA)
Related Parts
5310-00-122-0602INTERCHANGEABLE
WASHER,FLAT
F2-1-2D95D
5940-00-156-7205INTERCHANGEABLE
TERMINAL,LUG
110
5136-00-203-6504INTERCHANGEABLE
TAP,THREAD CUTTING
5133-00-234-5139INTERCHANGEABLE
DRILL,TWIST
5930-00-272-7940INTERCHANGEABLE
SWITCH,PUSH
10250H375-12
2990-00-438-1551INTERCHANGEABLE
CAP ASSEMBLY,PROTECTIVE,MUFFLER-
11013-12
6615-00-471-3674INTERCHANGEABLE
RETAINER,GYROSCOPE
11014
5330-00-580-5327INTERCHANGEABLE
PACKING WITH RETAINER
110-1/4
5331-00-618-6020INTERCHANGEABLE
O-RING
6685-00-679-0908INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
5331-00-952-5433INTERCHANGEABLE
O-RING
AS568-014
5330-01-117-3123INTERCHANGEABLE
PACKING WITH RETAINER
16HD-5-2

Frequently Asked Questions

What is NSN 2990-00-352-9764?

NSN 2990-00-352-9764 is a Cap Assembly,protective,muffler-, manufactured by Mercury Products Corp, classified under FSC 2990 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2990-00-352-9764?

NSN 2990-00-352-9764 has 10 cross-referenced part numbers: 965-4-1-4 (Mercury Products Corp), 63546 (Davey Compressor Co Div of Keco Industries Inc), 11014 (Gleason Corp Anthes Div), 82132053 (Lucas Western Inc), 965-4 1-4 (Mercury Products Corp) and 5 more.

What NSN replaces 2990-00-352-9764?

There are 12 known substitutes for 2990-00-352-9764: 5310-00-122-0602, 5940-00-156-7205, 5136-00-203-6504 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 965-4-1-4?

Key specifications for 965-4-1-4: Pipe Outside Diameter Accommodated: 4.438 INCHES IN. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2990-00-352-9764 still in active supply?

NSN 2990-00-352-9764 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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