Model: 203688C7

Hexagon Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque with nonmetallic insert
Lubrication
Soluble lubricant
Nut Style
Hexagon
Nut Height
0.188 inches
End Application
W/s: stream (std. Tensioned replenishment at sea method); fire control system, missile mk74 (fcs); support equipment, b-1 aircraft; guided missile launching system, mk 26 (gmls); airborne mobile dir air spt ctl (2id), (02m jul83)(an/uyq-3a); support equipment, b-52 aircraft; radar set, an/tpn-18; aircraft, sof (ac-130h, mc-130h, ec-130e, hc-130); communications terminal, satellite an/gsc-3 (v) 1
Width Across Flats
Between 0.336 inches and 0.345 inches
Tempurature Rating
250.0 degrees fahrenheit
Thread Series
Unjc
Thready Qty Per Inch (tpi)
32
Thread Size
0.164 inches
Countersink Angle
88.0 degrees nut
Bearing Surface Type
Chamfered or washer faced
Bearing Surface Finish
125.0 microinches
Material
Plastic polyamide locking insert
Material
Stainless steel nut
Surface Treatment
Passivate nut
Surface Treatment Specification
Qq-p-35 federal specification single treatment response except insert
NSN
5310-00-939-0850
Part Number
203688C7
Description
Nut,self-locking,hexagon
CAGE
71313

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, cap.

Part 203688C7 NSN 5310-00-939-0850

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05277
FIIG:
A021A0
Concept No.:
1
App. Key:
BK
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:
U
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:
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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