Close Tolerance Screw

NSN: 5305-01-256-5800 | Model: NAS4703-5

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

5305-01-256-5800

DEMIL

Thread Class

Thread Direction

Right-hand

Thread Length

0.323 inches

Fastener Length

Between 0.620 inches and 0.650 inches

Head Style

Flat countersunk

Head Diameter

Between 0.266 inches and 0.303 inches

Grip Diameter

Between 0.1885 inches and 0.1895 inches

Internal Drive Style

Tri-wing recess

Thread Diameter

0.190 inches

Grip Length

Between 0.302 inches and 0.322 inches

Thready Qty Per Inch (tpi)

Countersink Angle

Between 99.0 degrees and 101.0 degrees

Material

Steel comp 4340 or steel comp 8740

Material Specification

Mil-s-5000, uns g43406 military specification 1st material response or ams 6322 assn standard 2nd material response or mil-s-6049, uns g87400 military specification 2nd material response

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416, type 2, class 2 federal specification all treatment responses

Supplementary Features

Tri-wing recess no. Nas4000-4

Thread Series Designator

Unjf

Specification Data

80205-nas4703 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 5305-01-256-5800 Datasheet

Supply Class (FSC):

Screws

Cross Reference:

NAS4703-5

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

U - Precious metal content is unknown

CRITL

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

Questions & Answers:
What are the historical prices recorded for this stock number?
No pre-dated pricing for this NSN could be found.
Does NSN 5305-01-256-5800 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Brazil, and Canada
What is the NIIN of NSN 5305-01-256-5800?
012565800 or 01-256-5800
Does NSN 5305-01-256-5800 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5305-01-256-5800?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jun 06, 1987