(50) Rare Vintage Aerospace Bolt 1023H4-15 Undercut Countersunk 1/4"-28 Lot / 50 For Sale

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

(50) Rare Vintage Aerospace Bolt 1023H4-15 Undercut Countersunk 1/4"-28 Lot / 50:
$50.99

Lot of 50

New surplus

There is no publicly available info on this fastener

I believe the groove around the countersunk portion of bolt classifies it as "undercut"

The groove appears to be a perfect 90° to match parallel with both the head and shaft

Dimensions

Grip length: 15/16"

Overall length:  1-5/16"

Diameter: 1/4"

Head diameter: 0.420"

Groove diameter: 0.324"

Top of groove to top of bolt: 0.055" flat to flat

Thread pitch: 1/4"-28

Drive: offset cruciform

$5 shippi

(50) Rare Vintage Aerospace Bolt 1023H4-15 Undercut Countersunk 1/4"-28 Lot / 50

$50.99

PLANTRONICS Boeing Pilot Aviation Headset with User Guide MS50/T30 Vintage Rare

$130.00

50-001-14 Astronautics P1-TC1 Turn Coordinator Indicator Made In USA VTG RARE

$499.99