Model: MS21281-08

Machine Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.667 inches and 0.750 inches
Fastener Length
0.750 inches
Head Style
Double hexagon w/hole
Head Height
0.375 inches
Width Between Flats
Between 0.367 inches and 0.376 inches
Extended Washer Diameter
0.500 inches
Extended Washer Thickness
Between 0.070 inches and 0.080 inches
Thread Diameter
0.312 inches
Features Provided
Finished head
Thready Qty Per Inch (tpi)
24
Min. Tensile Strength (psi)
130000 pounds per square inch
Hardness Rating
248.0 brinell standard and 341.0 brinell standard
Minimum Yield Strength
85000 pounds per square inch
Surface Finish
32.0 microinches threads
Surface Finish
63.0 microinches bearing surface of head
Material
Iron alloy 660
Material Specification
Ams 5735 assn standard single material response
Thread Series Designator
Unjf
NSN
5306-00-118-2940
Part Number
MS21281-08
Description
Bolt,machine
CAGE
96906

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

Part MS21281-08 NSN 5306-00-118-2940

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01847
FIIG:
A003B0
Concept No.:
App. Key:
BR
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:
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: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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