F55-2552-02

View detailed technical data, stock status, and sourcing information for: F55-2552-02
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-01-129-7612

Item Name Code

15891

Assigment Date

04/10/1982 (44 years ago)

An internally threaded item with a cylindrical and/or square, hexagonal, octagonal, or dodecagonal outer periphery (parallel to the threaded axis) a portion(s) of which may or may not be enlarged, forming a flange(s) and/or shoulder(s). Items not having an enlarged outer portion may be threaded, a part of the full length, or tapped from both ends. Items having an enlarged outer portion (flange(s) or shoulder(s)) may be threaded the full length, threaded a part of the full length, or tapped from both ends. Items tapped from both ends shall have either right-hand threads on both ends or left-hand threads on both ends. For items conforming to any of the above and having a length overall exceeding two times the largest outside diameter or width across flats, use post, electrical-mechanical equipment. For items with an outside contour that is the same the full length, having a continuous thread through its entire length, and the length does not exceed two times the diameter or width across the flats use nut (1), plain (as modified). Excludes:nut (1), plain, cap. See also turnbuckle body.

prevailing torque with nonmetallic insert locking feature, 0.222 inches minimum and 0.232 inches maximum base counterbore diameter, 3b thread class, floating self-locking barrel nut style, right-hand thread direction

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque with nonmetallic insert
Counterbore Diameter: 0.222 inches minimum and 0.232 inches maximum base
Nut Style: floating self-locking barrel
Nut Diameter: 0.3990 inches minimum and 0.4020 inches maximum
Nut Length: 0.360 inches minimum and 0.390 inches maximum
Barrel Height: 0.245 inches minimum and 0.265 inches maximum
Nut Height: 0.309 inches minimum and 0.359 inches maximum
Nut Counterbore Depth: 0.089 inches minimum and 0.109 inches maximum base
Temp Rating: 250.0 fahrenheit maximum
Thread Series: unjf
Thread Quantity Per Inch: 32
Nominal Thread Size: 0.190 inches
Material: aluminum alloy 7075 base
Material: plastic polyamide (nylon) locking insert
Material: steel comp 4130 nut

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
10109543	Barrel Self-Locking Nut
F55-2552-02	Barrel Self-Locking Nut
ST3M875-3	Barrel Self-Locking Nut

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5310-01-129-7612?

The FSCG of the NSN 5310-01-129-7612 is 5310

Does the NSN 5310-01-129-7612 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-01-129-7612 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 5310-01-129-7612 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-01-129-7612 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 5310-01-129-7612 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Sat, Apr 10, 1982