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5306-01-059-1088

Close Tolerance Bolt

Find complete technical information, availability, and procurement data for NSN 5306-01-059-1088 All details are based on official government and industry records to support accurate and compliant procurement.

5306-01-059-1088
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5306 Bolts
National Stock Number
5306-01-059-1088
Item Name Code
27851
Assigment Date
04/06/1978 (48 years ago)

A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. The unthreaded portion is of specific grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. A locking feature may be incorporated in the design of the head or threads. See bolt, machine and bolt, clevis.

0.828 inches minimum and 0.878 inches maximum thread length, 2.338 inches minimum and 2.368 inches maximum fastener length, spline extended washer head style, 3a thread class, right-hand thread direction

Characteristics

Below are the official specifications and performance details for this part, including technical data, material composition, and compliance information.

Thread Class
3a
Thread Direction
right-hand
Thread Length
0.828 inches minimum and 0.878 inches maximum
Fastener Length
2.338 inches minimum and 2.368 inches maximum
Head Style
spline extended washer
Head Height
0.440 inches minimum and 0.460 inches maximum
Extended Washer Diameter
0.922 inches minimum and 0.932 inches maximum
Extended Washer Thickness
0.062 inches minimum and 0.082 inches maximum
Grip Diameter
0.4985 inches minimum and 0.4995 inches maximum
Nominal Thread Diameter
0.500 inches
Grip Length
1.490 inches minimum and 1.510 inches maximum
Thread Quantity Per Inch
20
Hardness Rating
46.0 rockwell c minimum and 50.0 rockwell c maximum overall
Surface Finish
32.0 microinches bearing surface of head
Surface Finish
32.0 microinches grip
Material
steel comp h11 overall
Surface Treatment
cadmium overall
Thread Series Designator
unjf

Related Parts & Specifications

This NSN includes a range of related parts designed for specific operational needs. Review each item below to find in-depth specifications, functional details, and guidance for correct application and replacement.

Part Number Name
MS21297-08024 Close Tolerance Bolt

Classification Data

Detailed NSN information including identification codes, classification data, and key indicators used for cataloging, logistics, and supply management.

Type of Item Identification
4 - Partial descriptive item identification (type 1 concept)
Demilitarization
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.
Criticality
X - The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Federal Item Identification Guide
A003B0
Precious Metals Indicator
U - Precious metal content is unknown
Pseudo Item Name Code
0027851
Hazardous Material Indicator
N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Schedule B Code
7318152000

Freight Information

Comprehensive freight classifications, shipping codes, and handling specifications for domestic and international transport compliance.

Major Organizational Entity
KZ
National Motor Freight Classification Item Number
093486
National Motor Freight Classification Sub-Item Number
Z
Uniform Freight Classification Item Number
48950
National Motor Freight Class Rating
W - Rating variable
Water Commodity
573 - Bolts or nuts (iron or steel),(less than 35 feet)
Type of Cargo
Z - No special type of cargo code applicable
Special Hand
9 - Other or no special handling required (sh)
Air Dimension
A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.
Air Commodity
BZ -
National Motor Freight Description
bolts,nuts or screws, noi (sub 3)

FAQs

Get insights on installation procedures, operating conditions, care instructions, industry regulations, and common issues. FAQs below provide key information for 5306-01-059-1088

What is the FSCG of the NSN 5306-01-059-1088?
The FSCG of the NSN 5306-01-059-1088 is 5306
Does the NSN 5306-01-059-1088 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5306-01-059-1088 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 5306-01-059-1088 contain precious materials?
Precious metal content is unknown
Does NSN 5306-01-059-1088 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 5306-01-059-1088 was assigned to the Federal Catalog?
It was assigned 48 years ago, on Thu, Apr 6, 1978

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Price & Availability

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Ready to Ship

This item is in stock and ready to ship. Available units may vary in condition (new, surplus, refurbished) and are stored across multiple verified facilities. Request a quote to confirm quantity and lead time.

New Surplus 1,602
New Material 184
Total 1,786
Availability of this item was last updated on: 05/01/2026 03:05 PM EDT. Stock levels and pricing are subject to change.
Aviation Suppliers Association Member AS9120-ISO9001 Certification

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