Model: 1/2-UNC3B QQN-2 81D CL A OR B

Hexagon Plain Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Nut Style
Hexagon
Nut Height
Between 0.427 inches and 0.448 inches
Width Across Flats
Between 0.736 inches and 0.750 inches
Thread Series
Unc
Thready Qty Per Inch (tpi)
13
Thread Size
0.500 inches
Bearing Surface Type
Chamfered
Material
Nickel alloy r-405 or nickel alloy 400
Material Specification
Qq-n-281d cl a or cl b federal specification single material response
NSN
5310-01-440-5794
Part Number
1/2-UNC3B QQN-2 81D CL A OR B
Description
Nut,plain,hexagon
CAGE
D9182

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 1/2-UNC3B QQN-2 81D CL A OR B NSN 5310-01-440-5794

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01857
FIIG:
A021A0
Concept No.:
1
App. Key:
AG
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:
A
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7508900000
  • SITC: 69975
  • End Use: Finished metal shapes
  • NAICS: 332999
  • USDA: 1

Freight Class: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)

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