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5305-00-026-6550

Find complete technical information, availability, and procurement data for: 5305-00-026-6550

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5305-00-026-6550
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-026-6550
Item Name Code
18257
Assigment Date
01/01/1963 (63 years ago)

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

right-hand thread direction, 3a thread class, 1.000 inches minimum thread length, 1.125 inches nominal fastener length, hexagon head style

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class
3a
Thread Direction
right-hand
Thread Length
1.000 inches minimum
Fastener Length
1.125 inches nominal
Head Style
hexagon
Head Height
0.273 inches minimum and 0.289 inches maximum
Width Between Flats
0.551 inches minimum and 0.562 inches maximum
Hole Diameter
0.062 inches nominal
Nominal Thread Diameter
0.375 inches
Hole Quantity
3
Hole Type
drilled
Thread Quantity Per Inch
16
Minimum Tensile Strength
125000 pounds per square inch
Hole Configuration Style
hexagon flats
Material
steel overall
Material Document And Classification
mil-s-890,alloy no. 2 mil spec single material response overall
Surface Treatment
zinc overall
Surface Treatment Document And Classification
qq-z-325,ty 2,cl 3 fed spec single treatment response overall
Thread Series Designator
unc
Nondefinitive Spec/Std Data
a type
Departure From Cited Designator
as mod by head hole configuration

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number Name
306-40083 Hexagon Head Cap Screw
734908PC101 Hexagon Head Cap Screw

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5305-00-026-6550?
The FSCG of the NSN 5305-00-026-6550 is 5305
Does the NSN 5305-00-026-6550 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-026-6550 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5305-00-026-6550 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-026-6550 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5305-00-026-6550 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

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