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5305-00-143-1840

Socket Head Cap Screw

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Official Item Classification

Name
Socket Head Cap Screw
(NSN) National Stock Number
5305-00-143-1840
(FSG) Federal Supply Group
53 Hardware and Abrasives
(FSC) Federal Supply Classification
5305 Screws
(INC) Item Name Code
16282
(FIIG) Federal Item Identification Guide
A003B0
Date
09/20/1968 (58 years ago)

right-hand thread direction, 0.225 inches minimum and 0.291 inches maximum thread length, 3a thread class, flat countersunk head style, 0.485 inches minimum and 0.531 inches maximum fastener length

Specs & Compatibility

Thread Class

3a

Thread Direction

right-hand

Thread Length

0.225 inches minimum and 0.291 inches maximum

Fastener Length

0.485 inches minimum and 0.531 inches maximum

Head Style

flat countersunk

Head Diameter

0.200 inches minimum and 0.225 inches maximum

Internal Drive Style

cross recess type 1

Nominal Thread Diameter

0.112 inches

Thread Quantity Per Inch

40

Minimum Tensile Strength

125000 pounds per square inch

Hardness Rating

26.0 rockwell c minimum and 32.0 rockwell c maximum overall

Countersink Angle

99.0 degrees minimum and 101.0 degrees maximum

Material

steel comp 4037 or steel comp 8630 overall

Material Document And Classification

ams 6300 assn std 1st material response or mil-s-6050 mil spec 2nd material response overall

Surface Treatment

cadmium and chromate overall

Surface Treatment Document And Classification

qq-p-416,ty 2,cl 3 fed spec all treatment responses overall

Thread Series Designator

unc

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0016282

Related Hardware Products

Part Number Description
LK21091-04004 Socket Head Cap Screw
MS21091-04004 Socket Head Cap Screw

Frequently Asked Questions

What is the FSCG of the NSN 5305-00-143-1840?
The FSCG of the NSN 5305-00-143-1840 is 5305
Does the NSN 5305-00-143-1840 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-143-1840 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 5305-00-143-1840 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-143-1840 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 5305-00-143-1840 was assigned to the Federal Catalog?
It was assigned 58 years ago, on Fri, Sep 20, 1968