Model: NAS1287C4

Extended Washer Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Washer Outside Diameter
0.416 inches
Counterbore Diameter
0.254 inches nut
Overall Height
0.280 inches
Nut Style
Hexagon
Nut Counterbore Depth
0.090 inches nut
Width Across Flats
Between 0.304 inches and 0.316 inches
Tempurature Rating
1400.0 degrees fahrenheit
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Hardness Rating
Between 36.0 rockwell c and 42.0 rockwell c
Thread Size
0.250 inches
Part Name Assigned By Controlling Agency
Navy special project
Material
Nickel alloy m252
Material Specification
Ams 5756 assn standard single material response
Surface Treatment
Nickel locking insert and zinc locking insert
Surface Treatment
Nickel and zinc locking insert
Surface Treatment Specification
Ams 6304 assn standard single treatment response locking insert
NSN
5310-00-056-9524
Part Number
NAS1287C4
Description
Nut,self-locking,extended Washer
CAGE
80205

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 NAS1287C4 NSN 5310-00-056-9524

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

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: 7508900000
  • SITC: 69975
  • End Use: Finished metal shapes
  • NAICS: 332999
  • USDA: 1

Freight Class: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)

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