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NAS1633-20

View detailed technical data, stock status, and sourcing information for: NAS1633-20

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NAS1633-20
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-443-6796
Item Name Code
06657
Assigment Date
04/14/1969 (57 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

1.511 inches minimum and 1.541 inches maximum fastener length, 0.251 inches minimum and 0.301 inches maximum thread length, pan head style, right-hand thread direction, 3a thread class

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
0.251 inches minimum and 0.301 inches maximum
Fastener Length
1.511 inches minimum and 1.541 inches maximum
Head Style
pan
Head Diameter
0.357 inches minimum and 0.373 inches maximum
Head Height
0.122 inches minimum and 0.133 inches maximum
Internal Drive Style
torque set
Nominal Thread Diameter
0.190 inches
Thread Quantity Per Inch
32
Minimum Tensile Strength
160000 pounds per square inch
Hardness Rating
36.0 rockwell c minimum and 40.0 rockwell c maximum
Screw Material
steel comp 4140 or steel comp e4340 or steel comp 6150 or steel comp 8735 or steel comp 8740 or steel comp 4037
Screw Material Document And Classification
mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-8503 mil spec 3rd material response or mil-s-6098 mil spec 4th material response or mil-s-6049 mil spec 5th material response or ams 6300 assn std 6th material response
Screw Surface Treatment
cadmium and chromate
Screw Surface Treatment Document And Classification
qq-p-416,type 2,class 3 fed spec all treatment responses
Thread Series Designator
unjf

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
NAS1633-20 Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-443-6796?
The FSCG of the NSN 5305-00-443-6796 is 5305
Does the NSN 5305-00-443-6796 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-443-6796 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 5305-00-443-6796 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-443-6796 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 5305-00-443-6796 was assigned to the Federal Catalog?
It was assigned 57 years ago, on Mon, Apr 14, 1969

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