Model: 71X749

Lock Washer

Properties:

Hole Diameter
Between 0.195 inches and 0.204 inches
Outside Diameter
Between 0.395 inches and 0.410 inches
Material Thickness
Between 0.020 inches and 0.025 inches
End Application
W/s: shipboard material handling equipment (mhe); airborne mobile dir air spt ctl (2id), (02m jul83)(an/uyq-3a); aircraft (ac-130h, mc-130h, ec-130e, hc-130); close in weapon system (ciws-phalanx); support equipment, b-1 aircraft; missile, air intercept, sidewinder (aim-9); fire control system, missile mk 74 (fcs); engine, aircraft tf33-p-3/5/9 (c/ec-135, b-52h); gun mount, mk 75 (gm); fire pumps
Hardness Rating
Between 40.0 rockwell c and 50.0 rockwell c
Material
Steel comp 1050 or steel comp 1551 or steel comp 1059 or steel comp 1060 or steel comp 1561 or steel comp 1064
Material Specification
66 federal standard all material responses
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 3 federal specification single treatment response
Style Designator
Flat external teeth
NSN
5310-00-596-7691
Part Number
71X749
Description
Washer,lock
CAGE
24446

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 71X749 NSN 5310-00-596-7691

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:
--
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:
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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