Model: 0-521-220

Union Nut

Special Features:

Knurl 24 teeth per in. On outer surface

Properties:

Thread Class
2b
Thread Direction
Right-hand
Shoulder Width
0.125 inches
Nut Style
Round
Nut Diameter
1.500 inches
Nut Height
0.656 inches
Smallest Inside Diameter
1.130 inches
Thread Series
Un
Shoulder Step Width
0.125 inches
Shoulder Seat Diameter
Between 1.244 inches and 1.247 inches
Thready Qty Per Inch (tpi)
16
Thread Size
1.312 inches
Material
Aluminum alloy 2017
Material Specification
Qq-a-225/5; temper t451 federal specification single material response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625; type 1, class 1 military specification single treatment response
NSN
4730-00-032-7471
Part Number
0-521-220
Description
Nut,union
CAGE
04577

An internally threaded nut which has an internal seat or shoulder designed to engage the nut retaining flange of a union tailpiece. The threaded portion is used to engage the thread piece of a union, union elbor or the like. Excludes nut (1), tube coupling.

Part 0-521-220 NSN 4730-00-032-7471

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
19964
FIIG:
A021A0
Concept No.:
1
App. Key:
DB
Cond. Code:
2
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:
--
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:
013540
UFC:
05680
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7616106000
  • SITC: 69440
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Threaded fasteners of aluminum

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