Model: 91X12

Lock Washer

Properties:

Hole Diameter
Between 0.636 inches and 0.653 inches
Outside Diameter
1.079 inches
Material Thickness
Between 0.156 inches and 0.166 inches
End Application
W/s: boilers, 1200 psi; support equipment, b-1 aircraft; elevators, aircraft; vehicle, aircraft refueler r-14; stream (std. Tensioned replenishment at sea method); airborne mobile dir air ctl (2id), (02mjul83)(an/uyq-3a); mtvr family (includes tamcns d0198, d1062, d1073, & d1213); fire pumps; l.P. Compressors; communications terminal, satellite an/gsc-3 (v)1; 2320-01-097-0260 hemtt (heavy expanded mobility tactical trucks)
Hardness Rating
Between 45.0 rockwell c and 53.0 rockwell c
Material
Steel comp 1060 or steel comp 1561 or steel comp 1064 or steel comp 1065 or steel comp 1566 or steel comp 1069 or steel comp 1070 or steel comp 1572 or steel comp 1074 or steel comp 1075 or steel comp 1080
Material Specification
66 federal standard all material responses
Surface Treatment
Cadmium and chromate
Style Designator
Split helical-right hand
Departure From Cited Designator
As modified by surface treatment
NSN
5310-00-820-6653
Part Number
91X12
Description
Washer,lock
CAGE
83120

A washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces

Part 91X12 NSN 5310-00-820-6653

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
14218
FIIG:
A022B0
Concept No.:
1
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:
A
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
2.3000lbs
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:

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
194160
UFC:
55210
LTL:
50.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318210000
  • SITC: 69422
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Spring washers and other lock washers, iron or steel

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