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120240-7

View detailed technical data, stock status, and sourcing information for: 120240-7

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120240-7
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5307 Studs
National Stock Number
5307-00-007-1071
Item Name Code
16012
Assigment Date
07/06/1972 (54 years ago)

A headless fastener externally threaded on both ends with each threaded portion of one but not necessarily the same nominal diameter. It is designed to be locked in place by either a ring, lock, serrated or a ring, lock, keyed.

3a nut thread thread class, right-hand nut thread thread direction, +0.2778 to 0.2795 inches stud thread thread pitch diameters, 0.485 inches minimum and 0.515 inches maximum nut thread thread length, right-hand stud thread 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
3a nut thread
Thread Pitch Diameters
+0.2778 to 0.2795 inches stud thread
Thread Direction
right-hand nut thread
Thread Direction
right-hand stud thread
Thread Length
0.485 inches minimum and 0.515 inches maximum nut thread
Thread Length
0.375 inches minimum and 0.405 inches maximum stud thread
Locking Feature
ring, lock serrated
Overall Length
1.155 inches minimum and 1.215 inches maximum
Distance From Serrated Portion To Nut End
0.610 inches minimum and 0.640 inches maximum
Distance From Serrated Portion To Stud End
0.545 inches minimum and 0.575 inches maximum
Distance From Serrated Portion To End Of Stud Thread
0.140 inches minimum and 0.200 inches maximum
Serration Quantity
17
Thread Quantity Per Inch
18 stud thread
Thread Quantity Per Inch
28 nut thread
Hardness Rating
26.0 rockwell c minimum
Nominal Thread Size
0.250 inches nut thread
Nominal Thread Size
0.312 inches stud thread
Surface Finish
32.0 microinches nut thd
Serration Included Angle
86.0 degrees nominal
Material
steel comp 4130
Material Document And Classification
mil-s-6758 mil spec single material response
Surface Treatment
cadmium overall
Surface Treatment Document And Classification
qq-p-416,ty 2,cl 3 fed spec single treatment response overall
Style Designator
locked in
Thread Series Designator
unf nut thread
Thread Series Designator
uns stud thread

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
5307-00-497-4004 No Name Available 11/01/1989

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
120240-7 Locked in Stud
124590 Locked in Stud
3X124590 Locked in Stud
92597-8 Locked in Stud
MS51989-105-10 Locked in Stud
SF101-19SA10A Locked in Stud
SF101-9SA10A Locked in Stud

FAQs

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

What is the FSCG of the NSN 5307-00-007-1071?
The FSCG of the NSN 5307-00-007-1071 is 5307
Does the NSN 5307-00-007-1071 have a Schedule B code assigned?
Yes, the Schedule B code is 7318155000
Does NSN 5307-00-007-1071 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 5307-00-007-1071 contain precious materials?
Precious metal content is unknown
Does NSN 5307-00-007-1071 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 5307-00-007-1071 was assigned to the Federal Catalog?
It was assigned 54 years ago, on Thu, Jul 6, 1972

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Pricing

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ITAR Registered

In Stock

This item is currently available and ready for prompt shipment. Units may be offered in various conditions — new, surplus, or refurbished — and stored at verified global facilities. Request a quote to confirm current stock and delivery time.

New Surplus 238
New Material 1,537
Total 1,775
Availability of this item was last updated on: 04/08/2026 07:04 AM EDT. Stock levels and pricing are subject to change.

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