Model: 81581-0

Round Self-locking Nut

Properties:

Thread Pitch Diameters
+2.5119/+2.5170 inches
Thread Direction
Right-hand
Locking Feature
Prevailing torque with nonmetallic insert
Small End Diameter
2.922 inches
Drive Point Depth
Between 0.240 inches and 0.255 inches
Nut Style
Round
Nut Diameter
Between 3.360 inches and 3.375 inches
Nut Thickness
Between 0.609 inches and 0.641 inches
Drive Point Width
Between 0.230 inches and 0.260 inches
Undercut Thickness
0.141 inches
Drive Point Quantity
4
Thread Series
Uns
Thready Qty Per Inch (tpi)
18
Thread Size
2.548 inches
Material
Plastic polyamide locking insert
Material
Steel comp 1015 nut or steel comp 1018 nut or steel comp 1020 nut or steel comp 1117 nut or steel comp 1118 nut or steel comp 1213 nut
NSN
5310-01-063-1758
Part Number
81581-0
Description
Nut,self-locking,round
CAGE

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protusions, slots or splines in or on the periphery or in the face opposite the bearing surface. An integral feature is incorporated for locking on the threads of a mating member. Do not use if a more specific item name applies. Excludes collar, pin-rivet, threaded; insert, screw thread; nut (1), sleeve; nut(1), plain, cap; and turnbuckle body.

Part 81581-0 NSN 5310-01-063-1758

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15895
FIIG:
A021A0
Concept No.:
1
App. Key:
CA
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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.5000lbs
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:
E
LVL_B:
Q

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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