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NAS158AK3R9

View detailed technical data, stock status, and sourcing information for: NAS158AK3R9

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NAS158AK3R9
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-01-334-3621
Item Name Code
29294
Assigment Date
02/21/1991 (35 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, flat countersunk head style, 3a thread class, right-hand thread direction, 0.338 inches minimum and 0.388 inches maximum thread length

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
0.1890 inches minimum and 0.1895 inches maximum
Internal Drive Style
torque-set ribbed
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
Material
titanium alloy uns r56400 overall
Material Document And Classification
ams 4928 assn std single material response or ams 4967 assn std single material response overall
Thread Series Designator
unjf
Specification/Standard Data
80205-nas1581 professional/industrial association standard

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
NAS1581AK3R9 Close Tolerance Screw
NAS1581V3R9 Close Tolerance Screw
NAS158AK3R9 Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-334-3621?
The FSCG of the NSN 5305-01-334-3621 is 5305
Does the NSN 5305-01-334-3621 have a Schedule B code assigned?
Yes, the Schedule B code is 8109900000
Does NSN 5305-01-334-3621 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 5305-01-334-3621 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-01-334-3621 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 5305-01-334-3621 was assigned to the Federal Catalog?
It was assigned 35 years ago, on Thu, Feb 21, 1991

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