Close Tolerance Screw

NSN: 5305-01-443-8385 | Model: NAS1581C4T18

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 major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the shank diameter, but not below the major diameter for applicable class of fit, as shown in the screw thread standards, federal standard 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.

NSN Properties and Flags

NATO Stock Number

5305-01-443-8385

DEMIL

Thread Class

Thread Direction

Right-hand

Thread Length

0.403 inches

Fastener Length

Between 1.513 inches and 1.543 inches

Head Style

Flat countersunk

Head Diameter

Between 0.350 inches and 0.399 inches

Grip Diameter

Between 0.2485 inches and 0.2495 inches

Internal Drive Style

Offset cruciform (torque set)

Thread Diameter

0.250 inches

Grip Length

Between 1.115 inches and 1.135 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

160000 pounds per square inch

Countersink Angle

Between 99.0 degrees and 101.0 degrees

Surface Finish

32.0 microinches threads

Material

Iron alloy 660

Material Specification

Ams5731 assn standard single material response or ams5732 assn standard single material response or ams5737 assn standard single material response

Surface Treatment

Passivate

Thread Series Designator

Unjf

Specification Data

80205-nas1581 professional/industrial association standard

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

NSN 5305-01-443-8385 Datasheet

Supply Class (FSC):

Screws

Cross Reference:

NAS1581C4T18

Cage Codes:

National Aerospace Standards (CAGE 80205)

Schedule B & Trade:

Schedule B: 7318152000 (NAICS 332722)

Bolts and bolts and their nuts or washers exported in the same shipment
SITC: 69421

Screws, bolts, nuts, screw hooks, rivets, washers and similar articles, threaded, of iron or steel
End Use: 12110

Iron and steel products, other

Identification:

HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

A - Item does not contain precious metal.

ADPE

- Represents items with no adp components

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:

NMFC:

093486 - Bolts, nuts or screws, noi (sub 3)
WCC:

573 - Bolts or nuts (iron or steel),(less than 35 feet)
SHC:

9 - Other or no special handling required (sh)
ADC:

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

B - Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater
LTL:

W - Rating variable
TCC:

Z - No special type of cargo code applicable

NSN Management Codes:

SOS
Sms
AAC
Z
Quantity per pack
No qup
Unit of Measure
Ea
Shelf Life
N/A
Classification Control
U
MGMT_CTL
Sf9---n
Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $10.85 to $18.09..
Does NSN 5305-01-443-8385 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Air Force, Department Of The Navy, Spain, Canada, and Nato Maintenance and Supply Agency
What is the NIIN of NSN 5305-01-443-8385?
014438385 or 01-443-8385
Does NSN 5305-01-443-8385 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5305-01-443-8385?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Apr 18, 1997