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5305-01-303-3905

Find complete technical information, availability, and procurement data for: 5305-01-303-3905

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5305-01-303-3905
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-01-303-3905
Item Name Code
29294
Assigment Date
06/29/1989 (37 years ago)

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

0.910 inches minimum and 0.940 inches maximum fastener length, 3a thread class, 0.338 inches minimum and 0.388 inches maximum thread length, right-hand thread direction, flat countersunk 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
0.338 inches minimum and 0.388 inches maximum
Fastener Length
0.910 inches minimum and 0.940 inches maximum
Head Style
flat countersunk
Head Diameter
0.258 inches minimum and 0.305 inches maximum
Grip Diameter
0.1885 inches minimum and 0.1895 inches maximum
Internal Drive Style
high-torque
Nominal Thread Diameter
0.190 inches
Grip Length
0.552 inches minimum and 0.572 inches maximum
Thread Quantity Per Inch
32
Minimum Tensile Strength
160000 pounds per square inch
Countersink Angle
99.0 degrees minimum and 101.0 degrees maximum
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches grip
Surface Finish
32.0 microinches threads
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-nas1581 professional/industrial association standard

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Part Number Name
NAS1581C3H9 Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-303-3905?
The FSCG of the NSN 5305-01-303-3905 is 5305
Does the NSN 5305-01-303-3905 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-01-303-3905 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 5305-01-303-3905 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-01-303-3905 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 5305-01-303-3905 was assigned to the Federal Catalog?
It was assigned 37 years ago, on Thu, Jun 29, 1989

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