Aerospace Hardware Store

Aerospace

Hardware

HT3C6 Machine Screw

5305-00-803-0421

Specifications, compliance details, and sourcing options for this NSN. Request a quote to confirm availability, pricing, and lead time.

Request for Quote

Send us a request for quote using the form below. Our team will promptly provide you with the latest pricing and availability details.

AS9120 ISO9001 Aviation Suppliers Association Global Shipping

Featured Parts

BACD40B003-072-3-10
4720-01-365-5257
Air Duct Hose
BACD40B003-080-4-11
4720-01-047-5601
Air Duct Hose
BACD40B003-092-3-10
4720-01-365-5255
Air Duct Hose
BACD40B003-12-3-4
4720-01-199-3859
Air Duct Hose
BACD40B003-120-3-4
4720-01-199-3859
Air Duct Hose
BACD40B003-160-3-11
4720-01-140-6300
Air Duct Hose
BACD40B003-181-3-10
4720-01-365-5253
Air Duct Hose
BACD40B003-268-3-10
4720-01-365-5254
Air Duct Hose

Need Assistance?

Our catalog is extensive, but we understand that sometimes specific needs might not be immediately available. If you could not find the exact products you were searching for, we are here to help!

Contact us directly, and our team will assist you in finding the perfect solution for your requirements.

Contact Us

Certified Supplier

Order with confidence. We are a valued certified supplier serving customers in the military and aerospace industries.

  • Genuine Manufacturers Parts
  • 100% Product Inspection
  • 7 Year Sales Record Retention
  • Fast On-Time Delivery
  • HAZMAT Certified
  • Global Shipping

Official Item Classification

Name
Machine Screw
Part Number
HT3C6
(NSN) National Stock Number
5305-00-803-0421
(FSG) Federal Supply Group
53 Hardware and Abrasives
(FSC) Federal Supply Classification
5305 Screws
(INC) Item Name Code
06657
(FIIG) Federal Item Identification Guide
A500D0
Date
01/01/1962 (64 years ago)

flat countersunk head style, 3a thread class, right-hand thread direction, 0.651 inches nominal fastener length, 0.276 inches minimum thread length

Specs & Compatibility

Thread Class

3a

Thread Direction

right-hand

Thread Length

0.276 inches minimum

Fastener Length

0.651 inches nominal

Head Style

flat countersunk

Head Diameter

0.297 inches minimum and 0.302 inches maximum

Internal Drive Style

high-torque

Nominal Thread Diameter

0.190 inches

Thread Quantity Per Inch

32

Hardness Rating

45.0 rockwell c minimum and 49.0 rockwell c maximum

Countersink Angle

100.0 degrees nominal

Screw Material

steel comp 431

Screw Material Document And Classification

qq-s-763 fed spec single material response

Screw Surface Treatment

passivate

Thread Series Designator

unf

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.

Source of Supply Code

S9I

Pseudo Item Name Code

0006657

Related Hardware Products

Part Number Description
HT3C6 Machine Screw

Frequently Asked Questions

What is the FSCG of the NSN 5305-00-803-0421?
The FSCG of the NSN 5305-00-803-0421 is 5305
Does the NSN 5305-00-803-0421 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-803-0421 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 5305-00-803-0421 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-803-0421 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 5305-00-803-0421 was assigned to the Federal Catalog?
It was assigned 64 years ago, on Mon, Jan 1, 1962