Model: S1640-61212

Round Plain Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Counterbore Diameter
1.450 inches nut and 1.470 inches nut
Nut Style
Round
Nut Diameter
Between 1.719 inches and 1.781 inches
Nut Thickness
Between 0.469 inches and 0.531 inches
Nut Counterbore Depth
0.094 inches nut and 0.156 inches nut
Width Across Flats
Between 1.531 inches and 1.594 inches
Thread Series
Unf
Thready Qty Per Inch (tpi)
12
Thread Size
1.375 inches
Countersink Angle
109.5 degrees nut and 110.5 degrees nut
Material
Steel comp 4130
Material Specification
Mil-s-6758 military specification single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416 federal specification single treatment response
NSN
5310-00-638-1148
Part Number
S1640-61212
Description
Nut,plain,round
CAGE
78286

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part S1640-61212 NSN 5310-00-638-1148

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15887
FIIG:
A021A0
Concept No.:
1
App. Key:
AY
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:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318160000
  • SITC: 69421
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Nuts of iron or steel

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