Model: 3991-024

Quick Disconnect Coupling Half

Properties:

Thread Class
3a all ends
Overall Length
2.300 inches
Quick Disconnect Method
Quick lead thread all ends
Maximum Operating Temp
54.0 degrees celsius single response
Maximum Operating Temp
71.1 degrees celsius 1st response
End Application
Aircraft application
Connection Style
Flared all ends
Connection Type
Threaded external tube first fluid end connection
Features Provided
Self-sealing
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
0.750 inches all ends
Seat Angle
37.0 degrees
Outside Diameter Tube Accommodated
0.500 inches all ends
Material
Aluminum alloy body
Surface Treatment
Anodize body
Surface Treatment Specification
Mil-a-8625 military specification single treatment response body
Style Designator
Male coupling half
Thread Series Designator
Unf all ends
NSN
4730-00-554-7737
Part Number
3991-024
Description
Coupling Half,quick Disconnect
CAGE
82386

A fluid line fitting having a pipe, tube or hose connection or a through hole to accommodate a bolt, fluid passage on one end. The other end must have an internal or external quick disconnect feature for connecting a mating part to form a quick disconnect coupling assembly. The fitting may incorporate a self-sealing feature for the purpose of automatically shutting off the flow of fluid when disconnected from its mating half. For self-sealing fittings with an external or internal threaded disconnect end, see coupling half, self-sealing. See also, connector, multiple, fluid pressure line.

Part 3991-024 NSN 4730-00-554-7737

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
18681
FIIG:
A531T0
Concept No.:
App. Key:
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.3000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
051400
UFC:
29700
LTL:
77.5
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7609000000
  • SITC: 68427
  • End Use: Finished metal shapes
  • NAICS: 332919
  • USDA: 1

Freight Class: Aluminum tube or pipe fittings (couplings,elbows sleeves)

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