Description
Add a small but important piece of Korean War-era military Jeep hardware to your collection with this Ribbed Shoulder Bolt for the M38 G-740 Jeep, identified by Part Number 7328293 and NSN 5306-00-732-8293. This is a part-numbered U.S. military hardware component tied to the Truck, Utility: 1/4-Ton, 4x4, M38, the post-World War II military Jeep better known to collectors as the Willys M38.
Public NSN data identifies 5306-00-732-8293 as Bolt, Ribbed Shoulder, with P/N 7328293 listed as the design-control reference under U.S. Army Tank-Automotive Command. The same listing places the item under FSC 5306 – Bolts.
Historical Significance
The M38 G-740 Jeep is one of the most collectible postwar U.S. military Jeeps. It followed the World War II MB/GPW pattern but added key Cold War military features, including a stronger frame and suspension, waterproofed 24-volt ignition system, and venting provisions for deep-water fording.
The M38 is documented in the Army supply system as the Truck, Utility: 1/4-Ton, 4x4, M38, under SNL G-740. The September 1955 ORD 9 SNL G-740 supply manual lists service parts for this vehicle, making the G-740 designation especially important for restorers and parts collectors.
That history gives this bolt value beyond ordinary hardware. It belongs to the support-parts world of the M38 military Jeep, a Korean War-era vehicle that remained in service and in collector interest long after its original production period.
The Ribbed Shoulder Bolt
A ribbed shoulder bolt is a specific fastener type with a ribbed shoulder section beneath the head. In vehicle hardware, this kind of bolt is often used where alignment, grip, indexing, or controlled seating is important.
Known identification details include:
- Item: Ribbed Shoulder Bolt
- Vehicle Application: M38 G-740 Jeep
- Part Number: 7328293
- NSN: 5306-00-732-8293
- NIIN: 00-732-8293
- Catalog Nomenclature: Bolt, Ribbed Shoulder
- Federal Supply Group: 53 – Hardware and Abrasives
- Federal Supply Class: 5306 – Bolts
- Design-Control Reference: U.S. Army Tank-Automotive Command
- Associated Vehicle: Truck, Utility: 1/4-Ton, 4x4, M38
- Included Item: Bolt only, unless otherwise shown or stated
Public NSN data also shows Kelsey-Hayes Co. as a discontinued / replaced reference entry under reference number 33550, while 7328293 is listed as the active design-control reference.
Technical Details
Public technical data for NSN 5306-00-732-8293 lists the following specifications:
- Fastener Length: 1.420 in. nominal
- Head Style: Pan No. 2
- Head Diameter: 0.820 in. nominal
- Head Height: 0.160 in. nominal
- Shoulder Shape: Ribbed first shoulder
- Shoulder Diameter: 0.6020–0.6050 in.
- Shoulder Length: 0.340–0.350 in.
- Rib Quantity: 39
- Rib Length: 0.120 in. nominal
- Rib Major Diameter: 0.618–0.628 in.
- Thread Diameter: 0.500 in. nominal
- Thread Series: UNF
- Thread Class: 3A
- Thread Direction: Right-hand
- Threads Per Inch: 20
- Thread Length: 0.960 in. minimum
- Material: listed steel compositions include 1018, 1019, 1020, 1022, 1023, 1025, 1026, 1029, or 1030
- Minimum Tensile Strength: 110,000 psi
- Feature: Casehardened
- Hardness Range: 170–248 Brinell
These details make the bolt useful for collectors, restorers, and parts researchers who value original-style, part-numbered military hardware with traceable catalog data.
Why This Part Matters
Small hardware is often what separates a generic restoration from a correct military vehicle build. The M38 Jeep had many unique postwar military features, and part-numbered hardware helps preserve that original Army supply and maintenance story.
This Ribbed Shoulder Bolt is especially useful for collectors who focus on authenticity, correct fasteners, and traceable military parts. It pairs well with M38 Jeep manuals, SNL G-740 parts lists, Korean War vehicle displays, M-series Jeep hardware, and military vehicle restoration projects.
About This Bolt
This listing is for one Ribbed Shoulder Bolt for the M38 G-740 Jeep, identified by P/N 7328293 and NSN 5306-00-732-8293.
This listing is for the bolt only unless otherwise stated. No Jeep, bracket, nut, washer, mounting hardware set, tools, storage packaging, manual, or additional accessories are included unless specifically shown or noted.
This item is intended for collection, display, restoration reference, historical research, or military surplus parts study.
Ideal For
This bolt is a strong fit for:
- M38 G-740 Jeep restorers
- Korean War military vehicle collectors
- M-series Jeep parts collections
- U.S. Army surplus hardware collectors
- Willys M38 restoration-reference projects
- military vehicle museum displays
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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