Model: BH137M4

Extended Washer Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Washer Outside Diameter
Between 0.465 inches and 0.475 inches
Overall Height
0.340 inches
Nut Style
Hexagon
Washer Thickness
Between 0.110 inches and 0.120 inches
Width Across Flats
Between 0.305 inches and 0.313 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Thread Size
0.250 inches
Material
Iron alloy 660 nut
Material
Iron alloy 660 washer
Material Specification
Ams 5731 assn standard single material response nut or ams 5734 assn standard single material response nut or ams 5736 assn standard single material response nut
Material Specification
Ams5731 assn standard single material response washer or ams 5737 assn standard single material response washer
Surface Treatment
Disulfide molybdenum
Surface Treatment Specification
Mil-l-8937 military specification single treatment response
NSN
5310-01-352-8801
Part Number
BH137M4
Description
Nut,self-locking,extended Washer
CAGE
27238

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part BH137M4 NSN 5310-01-352-8801

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29730
FIIG:
A021A0
Concept No.:
1
App. Key:
BT
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:
0.1000lbs
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:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
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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