Model: AN893-31D

Boss Reducer

Special Features:

Three 0.065 in.Min, 0.075 in.Max diameter holes drilled through hex corners, 0.156 in. From first end; weapon system essential

Properties:

Thread Class
3a 2nd end
Thread Class
3b 1st end
Reducer Type
Concentric
End Application
Aircraft, stratofortress b-52
Connection Style
External seat for gasket seal (boss) 2nd end
Connection Style
Gasket seal (boss) 1st end
Connection Type
Threaded external boss 2nd end
Connection Type
Threaded internal boss 1st end
Thread Size
0.438 inches 1st end
Thread Size
0.875 inches 2nd end
Criticality Code Justification
Feat
Nominallength
0.844 inches
Material
Aluminum alloy
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 2 military specification single treatment response inside
Surface Treatment Specification
Mil-a-8625, type 2 military specification single treatment response outside
Thread Series Designator
Unjf all ends
NSN
4730-00-057-4554
Part Number
AN893-31D
Description
Reducer,boss
CAGE
88044

A straight fitting having a boss connection of a different size at each end. Both connections have external or internal machine threads (straight threads other than pipe or hose series) and are designed to facilitate a gasket, preformed packing, washer, or the like to form a seal at the boss. Excludes bushing (as modified).

Part AN893-31D NSN 4730-00-057-4554

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
23541
FIIG:
A080B0
Concept No.:
App. Key:
A
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:
Y

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
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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