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Worldwide distributor of NSN parts and consumables located in the USA.

Machine Bolt

Model / MPN: 321890 | NSN: 5306-00-680-9481
ITAR Registered seal

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 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.

Product Details
NATO Stock Number
5306-00-680-9481
Sold in multiples of
50 EA
DEMIL
NO
Thread Direction
Right-hand
Thread Length
Between 0.419 inches and 0.439 inches
Fastener Length
Between 0.490 inches and 0.510 inches
Head Style
Double hexagon w/hole
Head Height
Between 0.320 inches and 0.340 inches
Width Between Flats
Between 0.304 inches and 0.313 inches
Extended Washer Diameter
Between 0.428 inches and 0.448 inches
Extended Washer Thickness
Between 0.060 inches and 0.070 inches
Hole Diameter
0.062 inches
Thread Diameter
0.250 inches
Grip Length
0.071 inches
Hole Quantity
4
Hole Type
Drilled
Features Provided
Finished head
Nonstandard Thread Pitch Diameter
+0.2213/+0.2238 inches
Thready Qty Per Inch (tpi)
28
Hole Configuration Style
Double hexagon longitudinal hole
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
Precious Material
Silver
Surface Treatment
Silver
Surface Treatment Specification
Ams 2410 assn standard single treatment response
Thread Series Designator
Unf
Solicitations
Solicitation Description Qty UOM Close Date
SPE5E415TF540 Bolt, Machine 7257 EA 09/14/2015
SPE5E318T2972 Bolt, Machine 3747 EA 12/07/2017
SPE5E318T6578 Bolt, Machine 9000 EA 02/20/2018
SPE5E319T284G Bolt, Machine 15000 EA 08/02/2019

Pricing and Availability

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321890 Cross Reference
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