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5305-01-185-4644

Close Tolerance Screw

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Official Item Classification

Name
Close Tolerance Screw
(NSN) National Stock Number
5305-01-185-4644
(FSG) Federal Supply Group
53 Hardware and Abrasives
(FSC) Federal Supply Classification
5305 Screws
(INC) Item Name Code
29294
(FIIG) Federal Item Identification Guide
A003B0
Date
07/29/1984 (42 years ago)

0.763 inches minimum and 0.793 inches maximum fastener length, 0.378 inches minimum and 0.428 inches maximum thread length, flat countersunk head style, right-hand thread direction, 3a thread class

Specs & Compatibility

Thread Class

3a

Thread Direction

right-hand

Thread Length

0.378 inches minimum and 0.428 inches maximum

Fastener Length

0.763 inches minimum and 0.793 inches maximum

Head Style

flat countersunk

Head Diameter

0.464 inches minimum and 0.507 inches maximum

Grip Diameter

0.2485 inches minimum and 0.2495 inches maximum

Internal Drive Style

offset cruciform (torque set)

Nominal Thread Diameter

0.250 inches

Grip Length

0.365 inches minimum and 0.385 inches maximum

Thread Quantity Per Inch

28

Minimum Tensile Strength

16000 pounds per square inch

Countersink Angle

99.0 degrees minimum and 101.0 degrees maximum

Surface Finish

32.0 microinches grip

Surface Finish

32.0 microinches threads

Special Features

internal drive ribbed

Material

iron alloy 660 overall

Material Document And Classification

ams5731 assn std single material response or ams5732 assn std single material response or ams5737 assn std single material response overall

Surface Treatment

passivate overall

Surface Treatment Document And Classification

qq-p-35 fed spec single treatment response overall

Thread Series Designator

unjf

Specification/Standard Data

80205-nas1580 professional/industrial association standard

Regulatory Compliance

Precious Metals Indicator
A

Item does not contain precious metal.

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

0029294

Related Hardware Products

Part Number Description
NAS1580C4R6 Close Tolerance Screw

Frequently Asked Questions

What is the FSCG of the NSN 5305-01-185-4644?
The FSCG of the NSN 5305-01-185-4644 is 5305
Does the NSN 5305-01-185-4644 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-01-185-4644 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 5305-01-185-4644 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-01-185-4644 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 5305-01-185-4644 was assigned to the Federal Catalog?
It was assigned 42 years ago, on Sun, Jul 29, 1984