Model: ST3M552-8

Concave Washer

Properties:

Hole Diameter
0.685 inches
Radius
0.375 inches
Outside Diameter
Between 0.935 inches and 0.945 inches
Recess Depth
0.156 inches
Material Thickness
0.252 inches
Material
Steel comp 630 or steel comp 631 or steel comp 632
Material Specification
Ams 5643 assn standard 1st material response or ams 5528 assn standard 2nd material response or ams 5520 assn standard 3rd material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type 2, cl 3 federal specification single treatment response
Style Designator
Concave
Specification Data
76301-st3-552 manufacturers standard
NSN
5310-00-237-7705
Part Number
ST3M552-8
Description
Washer,concave
CAGE
76301

A washer which is round with a centrally located hole. One bearing surface is smooth, flat, and unbroken, the other bearing surface is smooth, unbroken, and is recessed to form a curved or spherical contour. See also washer (1), convex. Excludes washer (1), recessed and bearing, washer, thrust.

Part ST3M552-8 NSN 5310-00-237-7705

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15930
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:

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: 7318220000
  • SITC: 69422
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Washers other than lock washers, iron or steel

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