NSN NAS720B8-4

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.

pan no. 2 head style, 0.306 inches minimum and 0.322 inches maximum head diameter, 0.218 inches minimum and 0.250 inches maximum fastener length, offset cruciform (torque set) internal drive style, 0.085 inches minimum and 0.096 inches maximum head height.

NSN 5305-01-121-2689 Datasheet

(NSN) National Stock Number

5305-01-121-2689

(FSG) Federal Supply Group

53 - Hardware and Abrasives

(FSC) Federal Supply Classification

5305 - Screws

(NIIN) National Item Identification Number

01-121-2689

Requires Demilitarization

Yes

(INC) Item Name Code

06660

Date

Wed, Nov 4, 1981

Schedule B Code

7415338550

Fastener Length

0.218 inches minimum and 0.250 inches maximum

Head Height

0.085 inches minimum and 0.096 inches maximum

Head Diameter

0.306 inches minimum and 0.322 inches maximum

Head Style

pan no. 2

Internal Drive Style

offset cruciform (torque set)

Material Document And Classification

unable to decode

Material

Material

unable to decode

Minimum Tensile Strength

55000 pounds per square inch

Nominal Thread Diameter

0.164 inches

Primary Washer Style

split helical ring

Primary Washer Material Thickness

0.040 inches minimum

Primary Washer Outside Diameter

0.293 inches maximum

Secondary Washer Material Thickness

0.013 inches minimum and 0.019 inches maximum

Secondary Washer Outside Diameter

0.307 inches minimum and 0.317 inches maximum

Secondary Washer Style

flat

Secondary Washer Relationship To Primary Washer

not identical

Specification/Standard Data

80205-nas720 professional/industrial association standard

Surface Treatment Document And Classification

unable to decode

Surface Treatment

unable to decode

Thread Class

2a

Thread Direction

right-hand

Thread Length

0.202 inches minimum and 0.250 inches maximum

Thread Quantity Per Inch

32

Thread Series Designator

unified national coarse (unc)

Washer Quantity

2

Identification

Demilitarization Code

A - 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.

Precious Metals Indicator

A - Item does not contain precious metal.

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

0006660

Cross Reference

CAGE Codes

80205

National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use

Civilian standards and standards organizations (ex:iso,din,bs,ansi)

Freight Information

Air Commodity

BZ -

Air Dimension

A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

National Motor Freight Class Rating

Q - 70.0

Special Handling

9 - Other or no special handling required (sh)

Type of Cargo

Z - No special type of cargo code applicable

Uniform Freight Classification Item Number

48930

Water Commodity

713 - Metal hardware

National Motor Freight Classification Item Number

093460

Schedule B & Trade

Schedule B

7415-33-8550

Description

other copper screws (not for wood) bolts and nuts

End Use

12300 - Finished metal shapes

Unit of Quantity

KG

USDA

Yes

(SITC) Standard International Trade Classification

69433

(NAICS) North American Industrial Classification System

332722

Questions & Answers

1. What is the FSCG of the NSN 5305-01-121-2689?

   The FSCG of the NSN 5305-01-121-2689 is 5305

2. Does the NSN 5305-01-121-2689 have a Schedule B code assigned?

   Yes, the Schedule B code is 7415338550

3. Does NSN 5305-01-121-2689 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.

4. Does NSN 5305-01-121-2689 contain precious materials?

   Item does not contain precious metal.

5. Does NSN 5305-01-121-2689 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.

6. When the NSN 5305-01-121-2689 was assigned to the Federal Catalog?

   It was assigned 44 years ago, on Wed, Nov 4, 1981